EUROCONTROL

EUROCONTROL
EUROPEAN ORGANISATION
FOR THE SAFETY OF AIR NAVIGATION
EUROCONTROL
EUROCONTROL EXPERIMENTAL CENTRE
MODE-S SPECIFIC SERVICES
AND DATA LINK TEST BENCH
EEC Note No. 11/98
EEC Task C07
EATCHIP Task SUR-3-E1
Issued: April 1998
The information contained in this document is the property of the EUROCONTROL Agency and no part should be reproduced in
any form without the Agency’s permission.
The views expressed herein do not necessarily reflect the official views or policy of the Agency.
REPORT DOCUMENTATION PAGE
Reference:
EEC Note No. 11/98
Security Classification:
Unclassified
Originator:
EEC - COM
( CoE Communications)
Originator (Corporate Author) Name/Location:
EUROCONTROL Experimental Centre
B.P.15
F - 91222 Brétigny-sur-Orge CEDEX
FRANCE
Telephone : +33 (0)1 69 88 75 00
Sponsor:
EATCHIP Development Directorate
DED.3
Sponsor (Contract Authority) Name/Location:
EUROCONTROL Agency
Rue de la Fusée, 96
B -1130 BRUXELLES
Telephone : +32 2 729 9011
TITLE:
MODE-S SPECIFIC SERVICES AND DATA LINK TEST BENCH
Author
P.Hunt / P.Brun
EATCHIP Task
Specification
SUR-3-E1
Date
Pages
Figures
Tables
Appendix
References
04/98
v + 19
9
-
1
5
EEC Task No.
Task No. Sponsor
C07
SUR-3-E1
Period
4/97 to 1/98
Distribution Statement:
(a) Controlled by:
Head of COM
(b) Special Limitations: None
(c) Copy to NTIS:
YES / NO
Descriptors (keywords):
“Mode-S Specific Services” IIMSES DAP “Data Link” ModeS
Abstract:
This note describes a Mode-S test bench and test facility developed at the EUROCONTROL Experimental
Centre. An aircraft fitted with MODE-S specific services and data link equipment may be fully tested using
this mobile ground station. Downlink Aircraft Parameters (DAPs) may be validated, uplink and downlink
messages sent and controlled and all types of Broadcast messages may also be extracted and verified. The
hardware and software used is described within this note.
This document has been collated by mechanical means. Should there be missing pages, please report to:
EUROCONTROL Experimental Centre
Publications Office
B.P. 15
91222 - BRETIGNY-SUR-ORGE CEDEX
France
EEC Note No. 11/98
EEC Task No. C07
Issued : April 1998
MODE-S SPECIFIC SERVICES
AND
DATA LINK TEST BENCH
by
Patrick HUNT
Philippe BRUN
Summary
This note describes a Mode-S test bench and test facility developed at the EUROCONTROL
Experimental Centre. An aircraft fitted with MODE-S specific services and data link equipment may be
fully tested using this mobile ground station. Downlink Aircraft Parameters (DAPs) may be validated,
uplink and downlink messages sent and controlled and all types of Broadcast messages may also be
extracted and verified. The hardware and software used is described within this note.
iii
TABLE OF CONTENTS
1. INTRODUCTION ..................................................................................................................... 1
2. HARDWARE............................................................................................................................ 2
3. SOFTWARE ............................................................................................................................ 3
3.1. FUNCTIONS PERFORMED BY TEST BENCH SOFTWARE.............................................................. 3
3.1.1. Listen for Mode S acquisition squitters........................................................................... 3
3.1.2. Listen for Mode S extended squitters............................................................................. 3
3.1.3. Send all call requests and decode replies UF11/DF11 ................................................. 3
3.1.4. Send surveillance request and receive replies UF 4/5 DF 4/5 ..................................... 3
3.1.5. Send Comm A message/requests and receive Comm B replies UF 20/21 DF 20/21 ... 3
3.1.6. Send Comm C messages up to 16 segments UF 24 ..................................................... 3
3.1.7. Receive Comm D messages up to 16 segments DF 24................................................. 3
3.1.8. Extract all GICB messages - BDS 05 to BDS FF .......................................................... 3
3.1.9. Extract transponder Capability Report - BDS 10............................................................ 4
3.1.10. Extract Aircraft Identification Report - BDS 20 ............................................................ 4
3.1.11. Extract TCAS Report - BDS 30 .................................................................................... 4
3.1.12. Listen for and extract any Broadcast Messages emanating from Aircraft .................... 4
4. OPERATIONAL DETAILS....................................................................................................... 5
4.1. APPLICATION DETAILS ............................................................................................................ 5
4.1.1. UF 11/DF 11 ................................................................................................................... 5
4.1.2. GICB............................................................................................................................... 5
4.1.3. CommA........................................................................................................................... 5
4.1.4. CommB........................................................................................................................... 5
4.1.5. Address Mode S............................................................................................................. 6
4.1.6. CommC........................................................................................................................... 6
4.1.7. CommD........................................................................................................................... 6
4.1.8. Squitter ........................................................................................................................... 6
4.1.9. Stop Display ................................................................................................................... 6
4.1.10. ADS-B .......................................................................................................................... 6
5. COSTS .................................................................................................................................... 8
6. CONCLUSION......................................................................................................................... 9
G L O S S A R Y........................................................................................................................ 10
R E F E R E N C E S ................................................................................................................. 10
FIGURE 1 - INITIAL MENU ....................................................................................................... 11
FIGURE 2 - SQUITTER RECEPTION ....................................................................................... 12
FIGURE 3 - ALTITUDE AND MODE A CODE RECEPTION .................................................... 13
Mode-S Specific Services and Data Link Test Bench
iv
FIGURE 4 - COMM C TRANSMISSION.................................................................................... 14
FIGURE 5 - ADS B RECEPTION AND CPR DECODING........................................................ 15
FIGURE 6 - RESULT RECORDING OF GICB CONTENTS AND DECODING IN
ENGINEERING UNITS.............................................................................................................. 16
FIGURE 7 - RECORDING OF SQUITTER DATA...................................................................... 17
FIGURE 8 - PHOTO .................................................................................................................. 18
FIGURE 9 - PHOTO .................................................................................................................. 19
Mode-S Specific Services and Data Link Test Bench
v
1.
INTRODUCTION
More and more aircraft will be fitted with Mode S data link equipment in the coming
years.
In the context of the Eurocontrol IIMSES programme, Eurocontrol is paying for the
equipage of several aircraft with Mode S Specific Services capabilities. This will enable
the enhanced surveillance capability of the POEMS radars to be validated during the
pre-operational phase, and at a later stage enable ATN type messages to be
exchanged.
As no Test Bench is available on the market at the present time, a small portable Test
Bench has been developed at the EEC in order to test the Mode S installation of these
aircraft. The installations conform as far as is possible to the “Mode S Specific Services
Manual” issued by SICASP (June 97) and eventually to be included in the ICAO Annex
10.
This technical note describes the Test Bench hardware and application software.
This test bench has already been used to verify a Mode S Specific Services installation
on the Airbus Inter Transport A300/600ST aircraft (a.k.a. Beluga) at Toulouse airport.
Mode-S Specific Services and Data Link Test Bench
1
2.
HARDWARE
A low powered Ground Station developed by Dassault Electronique is used to generate
and receive Mode S interrogations and replies.
A PC driven Input/Output card also developed by Dassault enables a standard PC to
communicate with and control the Mode S Ground Station.
An omni-directional or simple directionally fixed antenna is used at the RF output of the
Test Bench.
The Test Bench has a range of about 70 Km with this type of antenna.
Mode-S Specific Services and Data Link Test Bench
2
3.
SOFTWARE
The application software package for the Test Bench has been developed by EEC.
The application is written in C and runs under the control of a real time multi-tasking
system already used by us before for several other real time applications on Pcs.
The real time operating system is from On-Time Gmbh. Germany and is called RT
Kernel.
A library of functions was provided by Dassault [2] to enable control of their PC card.
These functions have been updated and extended by Eurocontrol.
3.1.
Functions performed by Test Bench Software
3.1.1. Listen for Mode S acquisition squitters
Extract Mode S address
Extract transponder capability
3.1.2. Listen for Mode S extended squitters
Receive Position squitters
Airborne position reports
Ground position reports
Receive Air Vector Squitters
Receive Identification squitters
3.1.3. Send all call requests and decode replies UF11/DF11
3.1.4. Send surveillance request and receive replies UF 4/5 DF 4/5
3.1.5. Send Comm A message/requests and receive Comm B replies UF 20/21 DF 20/21
3.1.6. Send Comm C messages up to 16 segments UF 24
3.1.7. Receive Comm D messages up to 16 segments DF 24
3.1.8. Extract all GICB messages - BDS 05 to BDS FF
Display where relevant the aircraft parameters in engineering units
Mode-S Specific Services and Data Link Test Bench
3
3.1.9. Extract transponder Capability Report - BDS 10
3.1.10. Extract Aircraft Identification Report - BDS 20
3.1.11. Extract TCAS Report - BDS 30
3.1.12. Listen for and extract any Broadcast Messages emanating from Aircraft
Change of Capability Report
Change of Aircraft Identity Report
Air Initiated Comm B message available
Comm D message available
Mode-S Specific Services and Data Link Test Bench
4
4.
OPERATIONAL DETAILS
The software package produced by Eurocontrol is an executable programme which runs
as a stand alone application on a standard IBM compatible PC.
This executable programme can be distributed freely, if further development is
envisaged by a user it would be necessary to purchase a licence from On Time Gmbh.
for the RT Kernel system [4].
4.1.
Application Details
The main menu of the application allows you to perform the following functions. During
the tests all data sent and received by the bench is recorded on the hard disk.
4.1.1. UF 11/DF 11
This function transmits All Call interrogations (UF 11) and listens for the aircraft replies
(DF 11). When the Mode S address is acquired, the aircraft is then interrogated at a
low rate with DF 4, 5, 20 and 21 interrogations (Rate is about 1/2 Hz). The Mode A code
and barometric altitude provided by the Mode S replies are then displayed on the PC
screen.
4.1.2. GICB
All GICB registers can be extracted and displayed on the PC screen. There is a
secondary menu which enables the operator to choose one or more GICB registers or a
group of GICB registers to be extracted consecutively by the bench. The contents of
certain GICB registers are displayed in engineering units when they have been specified
by the Mode S Specific Services Manual [1] or by previous Eurocontrol documents [5].
As well as the aircraft data GICBs the GICBs 10, 20, 30 are displayed (Capability report,
Flight Identity and TCAS status).
4.1.3. CommA
CommA data link messages are sent to the aircraft. A second menu lets you choose
from an uplink message list or send a free text message. At the present time the
message list contains messages formatted for the “old” data link protocol used by
Eurocontrol. Mode S Specific Service messages (or ATN message types) could be
added at a later stage. These messages are sent to the ADLP by the transponder and
have to be validated on the aircraft side.
4.1.4. CommB
This function listens during the surveillance phase to detect if the DR (Data Request)
field of the Mode S reply has changed, indicating a downlink message has been
announced by the aircraft and is waiting to be extracted by the ground. The DR field
Mode-S Specific Services and Data Link Test Bench
5
may be 0, 1, 2, 4, or 5 depending on the type of message being downlinked. DR=0
means no message waiting, DR=1 means an AICB message is waiting, DR=2 means a
TCAS state message is waiting, and DR 4 or 5 means a Broadcast message is waiting.
The messages are extracted and displayed on the PC screen, decoding is done when
possible. CommB closeout messages are sent after successful extraction of the AICBs.
Broadcast messages time themselves out after 18 seconds. DR > 16 and < 32 are
possible but indicate CommD messages waiting and are dealt with later on.
4.1.5. Address Mode S
This function is simply to choose a Mode S address from the address list if several
aircraft are within range and it is required to test only one particular aircraft.
4.1.6. CommC
CommC (U-ELMs) are sent uplink to the aircraft. Up to 16 segments may be sent, the
message sent and the acknowledgement from the aircraft are displayed on the screen.
If retries are required for some segments the number of retries and the segments resent
are indicated.
4.1.7. CommD
CommD (D-ELMs) are extracted from the aircraft transponder and displayed on the PC
screen. Up to 16 downlink segments may be received in one burst.
The DR field is checked during surveillance replies, a DR field between 16 and 31
indicates a CommD message is waiting to be extracted and the DR value indicates the
number of segments to be extracted (Number of segments announced = DR - 15). A
close out is sent by the bench after each CommD successfully extracted.
4.1.8. Squitter
This function simply listens to aircraft squitters and displays them on the PC screen.
The Mode S addresses are decoded showing which country the aircraft is from
according to the ICAO Annex 10 list, and if possible the aircraft registration (France,
USA) otherwise the Mode S address is shown in hexadecimal code (6 digits - 24 bits).
4.1.9. Stop Display
This function simply toggles the screen updating, it is sometimes useful to hold the
screen display steady whilst checking some parameters or values. The bench continues
to function normally during this time and the screen can be restarted by selecting stop
display a second time (toggle).
4.1.10. ADS-B
Mode-S Specific Services and Data Link Test Bench
6
The bench listens for acquisition and extended squitters from aircraft. The number of
both types of squitter is counted, in order to verify the squitter rates. Extended squitter
position reports are decoded from the CPR data and the aircraft’s position is shown in
latitude and longitude, the altitude is also decoded. The identification squitter is also
decoded and the aircraft’s flight identification is displayed.
Implementation of all the new extended squitter types will be added at a later stage
when they have been finalised.
Mode-S Specific Services and Data Link Test Bench
7
5.
COSTS
In order to give the reader an idea of the costs involved to develop his own test tools
here are the prices of the main components required.
•
•
•
•
•
Mode S Station + PC I/O card
Simple omnidirectional antenna
Standard IBM compatible PC
Real Time Kernel (RTK C 4.5)
or Real Time Kernel (RTK C (32 bit))
Mode-S Specific Services and Data Link Test Bench
340
10
10
1,5
4
K FRF
K FRF
K FRF
K DEM
K DEM
8
6.
CONCLUSION
This test bench has already proved to be a very useful tool when validating Mode S
data link installations. We intend to develop other Mode S tools using the test bench.
Mode-S Specific Services and Data Link Test Bench
9
GLOSSARY
CPR
Compact Position Report [1]
GICB
Ground Initiated CommB message
AICB
Air Initiated CommB message
BDS
CommB Definition Subfield
CommA
Short data link uplink message (56 bits)
CommB
Short data link downlink message (56 bits)
CommC
Long data link uplink message (112 bits)
CommD
Long data link downlink message (112 bits)
IIMSES
Initial Implementation of Mode S in Europe
POEMS
PreOperational European Mode S Stations
ELM
Extended Length Message
U-ELM
Uplink ELM (a.k.a. Comm C)
D-ELM
Downlink ELM (a.k.a. Comm D)
REFERENCES
[1] - Mode S Specific Services Manual - ICAO Doc 9688-AN/952 June 97
[2] - Mode S Data-Link Ground Station - IRIS Software user’s Manual Dassault Electronique
1408-903-000 Issue 3
[3] - Mode S Data-Link Ground Station - Supply Description Manual
Dassault Electronique
1408-902-000 Issue 3
[4] - RTKernel C 4.5 - User’s manual -
On Time Gmbh Hamburg
[5] - DLPU Model C2 Aircraft Installation & BDS Allocation
EEC Note 25/95 by P.Hunt
Mode-S Specific Services and Data Link Test Bench
10
Figure 1 - Initial Menu
11
Figure 2 - Squitter reception
12
Figure 3 - Altitude and Mode A Code Reception
13
Figure 4 - Comm C Transmission
14
Figure 5 - ADS B Reception and CPR Decoding
15
Figure 6 - Result Recording of GICB Contents and Decoding in Engineering Units
16
Figure 7 - Recording of Squitter Data
17
APPENDIX
CONTENTS
This Appendix shows details of all the GICB registers at present decoded by the test bench.
Other registers may be added when they become available.
Page No.
Eurocontrol Format
BDS 1.0 - Capability Report
BDS 1.7 - Engine No. 1 Report
BDS 2.0 - Flight Identity
BDS 2.1 - Aircraft Referenced State Vector Report
BDS 2.4 - Weight and Balance Report
BDS 2.7 - Engine No. 2 Report
BDS 2.A - Radio System Frequency Report VHF
BDS 3.1 - Waypoint Information
BDS 3.7 - Engine No. 3 Report
BDS 4.0 - Path and Attitude Report
BDS 4.1 - Waypoint Identifier
BDS 4.7 - Engine No. 4 Report
BDS 5.0 - Speed and Track Report
BDS 5.1 - Position Report
BDS 6.0 - Ground Referenced State Vector
BDS 6.1 - G.M.T. Report
BDS 7.0 - Aircraft Intention 1 Report
BDS 7.1 - Meteorological Report
BDS 8.0 - Aircraft Intention 2 Report
BDS 9.0 - Aircraft Intention 3 Report
BDS A.0 - Deviation Report
BDS B.0 - Airspeeds Report
BDS C.0 - Altitude Report
BDS D.0 - Intention Report 1
BDS D.1 - Turn Indication Report 1
BDS D.2 - Turn Indication Report 2
Mode S Specific Services Format
BDS 0.5 - Extended Squitter Airborne Position
BDS 0.6 - Extended Squitter Surface Position
BDS 0.7 - Extended Squitter Status
BDS 1.0 - Data Link Capability Report
BDS 2.0 - Aircraft Identity
BDS 4.0 - Aircraft Intention
BDS 4.3 - Aircraft Intention
BDS 4.4 - Meteorological Routine Report
BDS 4.5 - Meteorological Hazard Report
BDS 5.0 - Track and Turn Report
BDS 5.1 - Position Report Coarse
BDS 5.2 - Position Report Fine
BDS 5.3 - Air-referenced State Vector
BDS 6.0 - Heading and Speed Report
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
BDS 1,0 Capability Report
Eurocontrol Format
Purpose: To provide the DLPU status.
Notes:
1) Bite test bit B definition
1 = Bite test successful.
0 = Bite test failure.
2) DLPU status LED bit definition
1 = LED on.
0 = LED off
3) BDS 20 output
1 = active
0 = not active
4) ADI channels active bits c1 to c10. ( 10 channels )
1 = channel active.
5) DLT ( cockpit Data Link Terminal ) bit d definition
1 = DLT present and on-line
6) MICP ( cockpit printer ) bit m definition
1 = printer present and on-line
7) GPFT ( General Purpose File Transfer ) g bit definition
1 = GPFT initialised and available
0 = GPFT not initialised.
8) Control unit bit u definition
1 = control unit connected
9) Aircraft type field tttt definition
Indicates type of aircaft field 0 to 15 which is hard wired
on aircraft. This enables DLPU to process data from 15
different types of aircraft installations.
10) SAL Sytem Address Label field ssssssss definition.
The SAL can be hard wired on the aircraft. Value from 00
to FF hexadecimal. This is used by the file transfer facility.
1
Data
bit no.
Description
Bit.
BDS 1,0
( Not used )
Bite test
Status LED
BDS 20 o/p
ADI
Channels
Active
DLT
MICP
GPFT
Not used
Control unit
msb
Aircraft type
lsb
msb
System
Address
Label
lsb
Not used
0
0
0
1
0
0
0
0
x
x
x
x
x
B
S
T
c1
c2
c3
c4
c5
c6
c7
c8
c9
c 10
d
m
g
x
x
x
x
x
x
u
t
t
t
t
s
s
s
s
s
s
s
s
x
x
x
x
x
x
x
x
Mode-S Specific Services and Data Link Test Bench
BDS 1, 7 Engine No. 1
EUROCONTROL
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Report
Eurocontrol Format
Status bit = 0 also if data too old.
2
Data
bit no.
Status
Description
1 = valid data
msb = 128 %
N1 ACTUAL
Label 346
Range = [0,256 %]
Status
lsb = 128/1024 %
1 = Valid data
msb = 16384 lb/hr
FUEL FLOW
Label 347
Range = 0, 32768 lb/hr
Status
Sign
lsb = 8 lb/hr
1 = Valid data
1 = -ve
msb = 256 C
TOTAL AIR
TEMPERATURE
Label 211
Range = +-512 deg C
Status
Sign
msb = 0.5 C
1 = Valid data
1 = -ve
msb = 256 C
STATIC AIR
TEMPERATURE
Label 213
Range = +- 512 C
lsb = 0.5 C
ARINC
bit no.
30&31
28
27
26
25
24
23
22
21
20
19
18
30&31
28
27
26
25
24
23
22
21
20
19
18
17
30&31
29
28
27
26
25
24
23
22
21
20
19
30&31
29
28
27
26
25
24
23
22
21
20
19
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
BDS 2,0 Flight Identity
Eurocontrol Format
Purpose: To report aircraft identification to the ground in
accordance with Annex.10 Volume IV, section 3.1.2.9
Notes:
1) Annex 10, Volume IV, section 3.1.2.9 provides a full
definition of BDS 2,0
2) The character coding to be used is identical to taht
defined in Table 3-6 of Chapter 3, Annex 10, Volume IV.
3) This data may be input to ther transponder from sources
other than the Mode S ADLP.
4) This format is used by the extended squitter application.
3
Data
Description
Bit
BDS
Label 2,0
0
0
1
0
0
0
0
0
Character 1
see Note 2
Character 2
see Note 2
Character 3
see Note 2
Character 4
see Note 2
Character 5
see Note 2
Character 6
see Note 2
Character 7
see Note 2
Character 8
see Note 2
Mode-S Specific Services and Data Link Test Bench
BDS 2,1
EUROCONTROL
Aircraft Referenced State Vector Report
Eurocontrol Format
Status bit = 0 also if data too old.
4
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
Data
bit no.
Status
Sign
49
50
51
52
53
54
55
56
Status
Sign
Description
1 = valid data
MAGNETIC
HEADING
Label 320
Range = [+-180 deg]
lsb = 0.18 deg
Status
TRUE AIR SPEED
Label 210
Range = [0,2048 kt]
lsb = 0.5 kt]
Status
Sign
ALTITUDE RATE
Label 212 or 365
Range =[+-16384 ft/min]
lsb = 64 ft/min
Status
Sign
STATIC AIR
TEMPERATURE
Label 213
Range = [+-512 °C]
lsb = 0.5 °C
NORMAL BODY
ACCELERATION
Label 333
Range = [+-1g]
lsb = 0.16g
ARINC
bit no.
30&31
29
28
27
26
25
24
23
22
21
20
19
30&31
28
27
26
25
24
23
22
21
20
19
18
17
30&31
29
27
26
25
24
23
22
21
20
30&31
29
28
27
26
25
24
23
22
21
20
19
30&31
29
26
25
24
23
22
21
Mode-S Specific Services and Data Link Test Bench
BDS 2,4
EUROCONTROL
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Weight and Balance Report
Eurocontrol Format
Status bit = 0 also if data too old.
5
Data
bit no.
Status
Description
1 = valid data
CENTRE OF GRAVITY
Label 066 ( BCD )
Range = 0, 99.9 %
Status
1 = valid data
msb = 65536 lbs
GROSS WEIGHT
Label 075
Range = 0, 131072 lbs
msb = 16 lbs
ARINC
bit no.
30&31
27
26
25
24
23
22
21
20
19
18
17
16
15
30&31
28
27
26
25
24
23
22
21
20
19
18
17
16
Mode-S Specific Services and Data Link Test Bench
BDS 2, 7 Engine No. 2
EUROCONTROL
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Report
Eurocontrol Format
Status bit = 0 also if data too old.
6
Data
bit no.
Status
Description
1 = valid data
msb = 128 %
N1 ACTUAL
Label 346
Range = [0,256 %]
Status
lsb = 128/1024 %
1 = Valid data
msb = 16384 lb/hr
FUEL FLOW
Label 347
Range = 0, 32768 lb/hr
Status
Sign
lsb = 8 lb/hr
1 = Valid data
1 = -ve
msb = 256 C
TOTAL AIR
TEMPERATURE
Label 211
Range = +-512 deg C
Status
Sign
msb = 0.5 C
1 = Valid data
1 = -ve
msb = 256 C
STATIC AIR
TEMPERATURE
Label 213
Range = +- 512 C
lsb = 0.5 C
ARINC
bit no.
30&31
28
27
26
25
24
23
22
21
20
19
18
30&31
28
27
26
25
24
23
22
21
20
19
18
17
30&31
29
28
27
26
25
24
23
22
21
20
19
30&31
29
28
27
26
25
24
23
22
21
20
19
Mode-S Specific Services and Data Link Test Bench
BDS 2,A
EUROCONTROL
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Radio System Frequency Report VHF
Eurocontrol Format
Status bit = 0 also if data too old.
7
Data
bit no.
Status
Description
1 = valid data
10 Mhz
1 Mhz
VHF COM 1
Label 030 ( BCD )
0.1 Mhz
Status
0.01 Mhz
1 = valid data
10 Mhz
1 Mhz
VHF COM 2
Label 030 ( BCD )
0.1 Mhz
0.01 Mhz
ARINC
bit no.
30&31
28
27
26
25
24
23
22
21
20
19
18
17
16
15
30&31
28
27
26
25
24
23
22
21
20
19
18
17
16
15
Mode-S Specific Services and Data Link Test Bench
BDS 3,1
EUROCONTROL
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Waypoint Information
Eurocontrol Format
Status bit = 0 also if data too old.
8
Data
bit no.
Status
Sign
Description
1 = valid data
BEARING TO WAYPOINT
Label 115
Range =[ +-180 deg ]
lsb = 0.18 deg ]
Status
TIME TO GO
Label 002
BCD
Range = [0,399.9 min]
ARINC
bit no.
30&31
29
28
27
26
25
24
23
22
21
20
19
30&31
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
Status
DISTANCE TO GO
BCD
Label 001
Range = [0,3999.9 nm]
SPARE
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
Mode-S Specific Services and Data Link Test Bench
BDS 3, 7 Engine No. 3
EUROCONTROL
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Report
Eurocontrol Format
Status bit = 0 also if data too old.
9
Data
bit no.
Status
Description
1 = valid data
msb = 128 %
N1 ACTUAL
Label 346
Range = [0,256 %]
Status
lsb = 128/1024 %
1 = Valid data
msb = 16384 lb/hr
FUEL FLOW
Label 347
Range = 0, 32768 lb/hr
Status
Sign
lsb = 8 lb/hr
1 = Valid data
1 = -ve
msb = 256 C
TOTAL AIR
TEMPERATURE
Label 211
Range = +-512 deg C
Status
Sign
msb = 0.5 C
1 = Valid data
1 = -ve
msb = 256 C
STATIC AIR
TEMPERATURE
Label 213
Range = +- 512 C
lsb = 0.5 C
ARINC
bit no.
30&31
28
27
26
25
24
23
22
21
20
19
18
30&31
28
27
26
25
24
23
22
21
20
19
18
17
30&31
29
28
27
26
25
24
23
22
21
20
19
30&31
29
28
27
26
25
24
23
22
21
20
19
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS 4,0 Path & Attitude Report
Eurocontrol Format
Status bit = 0 also if data too old.
10
BDS
bit 1
2
3
4
5
6
7
8
9
10
11
12
Data
bit
Status
Sign
13
14
15
16
17
18
19
20
21
22
23
24
25
26
Status
Sign
27
28
29
30
31
32
33
34
35
36
37
38
39
40
Status
Sign
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Status
Sign
Description
1 = valid data
msb=90 deg
FLIGHT PATH ANGLE
Label 322
Range = [+-180 deg ]
lsb=0.18 deg
1 = valid data
msb = 2g
FLIGHT PATH ACCEL.
Label 323
Range = [+-4g ]
lsb=0.001g
1 = valid data
msb=90 deg
CORRECTED ANGLE
OF ATTACK
Label 241
Range = [+- 180 ]
lsb=0.044 deg
1 = valid data
msb=65,536 ft
BARO. CORRECTED
ALTITUDE
Label 204
Range [ 0,131072 ft]
lsb = 8 ft
ARINC
bit
30&31
29
28
27
26
25
24
23
22
21
20
19
30&31
29
28
27
26
25
24
23
22
21
20
19
18
17
30&31
29
28
27
26
25
24
23
22
21
20
19
18
17
30&31
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
Mode-S Specific Services and Data Link Test Bench
BDS 4,1
EUROCONTROL
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Waypoint Identifier
Eurocontrol Format
Status bit = 0 also if data too old.
11
Data
bit no.
Status
Description
1 = valid data
char 3
ACTIVE WAYPOINT 1
Label 356
ISO 5 Characters
char 2
Status
char 1
1 = valid data
char 6
ACTIVE WAYPOINT 2
Label 357
ISO 5 Characters
char 5
Status
Sign
char4
1 = valid
1 = west
msb = 90 deg
DESIRED TRACK
Label 114
Range = +- 180 deg
lsb = 90/512 deg
ARINC
bit no.
30&31
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
30&31
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
30&31
29
28
27
26
25
24
23
22
21
20
19
Mode-S Specific Services and Data Link Test Bench
BDS 4, 7 Engine No. 4
EUROCONTROL
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Report
Eurocontrol Format
Status bit = 0 also if data too old.
12
Data
bit no.
Status
Description
1 = valid data
msb = 128 %
N1 ACTUAL
Label 346
Range = [0,256 %]
Status
lsb = 128/1024 %
1 = Valid data
msb = 16384 lb/hr
FUEL FLOW
Label 347
Range = 0, 32768 lb/hr
Status
Sign
lsb = 8 lb/hr
1 = Valid data
1 = -ve
msb = 256 C
TOTAL AIR
TEMPERATURE
Label 211
Range = +-512 deg C
Status
Sign
msb = 0.5 C
1 = Valid data
1 = -ve
msb = 256 C
STATIC AIR
TEMPERATURE
Label 213
Range = +- 512 C
lsb = 0.5 C
ARINC
bit no.
30&31
28
27
26
25
24
23
22
21
20
19
18
30&31
28
27
26
25
24
23
22
21
20
19
18
17
30&31
29
28
27
26
25
24
23
22
21
20
19
30&31
29
28
27
26
25
24
23
22
21
20
19
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
BDS 5,0 Speed & Track Report
Eurocontrol Format
Status bit = 0 also if data too old.
13
Data
Description
Status 1 = valid data
msb = 2.048
MACH NUMBER
Label 205
Range = [ 0, 4.096 ]
lsb = 2.048/2048 = 0.001
Status 1 = valid data
msb = 512 kt
COMPUTED AIR
Label 206
Range = [ 0, 1023.5 ]
lsb = 0.5 kt
Status 1 = valid data
Sign 1 = westward
msb = 90 deg.
TRACK ANGLE TRUE
Label 313
Range = [ -180,+180 ]
lsb = 0.044 deg
Status 1 = valid data
Sign 1 = westward
msb = 90 deg
TRACK ANGLE
MAGNETIC
Label 317
Range = [ -180,+180 ]
lsb = 0.044 deg
ARINC
30&31
28
27
26
25
24
23
22
21
20
19
18
17
30&31
28
27
26
25
24
23
22
21
20
19
18
30&31
29
28
27
26
25
24
23
22
21
20
19
18
17
30&31
29
28
27
26
25
24
23
22
21
20
19
18
17
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
BDS 5,1 Position Report
Eurocontrol Format
Status bit = 0 also if data too old.
14
Data
bit no.
Status
Sign
Description
1 = valid data
msb = 90 deg
LATITUDE
Label 310
Range =[ +-180 deg ]
Status
Sign
lsb = 90/131072 deg
1 = valid data
msb = 90 deg
LONGITUDE
Label 311
Range =[ +-180 deg ]
Status
Sign
lsb = 90/131072 deg
1 = valid data
msb = 65536 ft
ALTITUDE
Label 203
Range = -1000,131072 ft
lsb = 8 ft
ARINC
bit no.
30&31
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
30&31
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
30&31
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS 6,0 Ground Referenced State Vector
Eurocontrol Format
Status bit = 0 also if data too old.
15
BDS
bit 1
2
3
4
5
6
7
8
9
10
11
12
Data
bit
Status
Sign
13
14
15
16
17
18
19
20
21
22
23
24
25
26
Status
27
28
29
30
31
32
33
34
35
36
Status
Sign
37
38
39
40
41
42
43
44
45
46
47
48
Status
Sign
49
50
51
52
53
54
55
56
Status
Sign
Description
1 = valid data
1 = westward
msb=90 deg
lsb=0.18 deg
ARINC
bit
30&31
29
28
27
26
25
24
23
22
21
20
19
1 = valid data
30&31
msb=1024 kt
27
26
25
24
23
22
21
20
19
18
17
16
TRACK ANGLE
MAGNETIC
Label 317
Range = [ -180, +180 ]
GROUND SPEED
Label 312
Range = [ 0, 2048 kt ]
lsb=0.5 kt
1 = valid data
msb=8192 ft/min
ALTITUDE RATE
Label 212 or 365
Range = [ +-16384 ft/m]
lsb=64 ft/min
1 = valid data
msb=256 deg
STATIC AIR TEMP.
Label 213
Range = [ +-512 deg ]
lsb=0.5 deg
1 = valid data
msb=0.5g
BODY NORMAL
ACCELERATION
Label 333
Range = [ +-1g]
msb=0.016g
30&31
29
27
26
25
24
23
22
21
20
30&31
29
28
27
26
25
24
23
22
21
20
19
30&31
29
26
25
24
23
22
21
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
BDS 6,1 G.M.T. Report
Eurocontrol Format
Status bit = 0 also if data too old.
16
Data
bit no.
Status
Description
1 = valid data
Hrs 0 -23
GMT Binary Word
Label 150
Minutes 0 - 59
Seconds 0 - 59
Status
1 = valid data
FLIGHT NUMBER (BCD)
Label 261
Status
1 = valid data
GMT BCD Word
Label 125
ARINC
bit no.
30&31
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
30&31
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
30&31
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
Mode-S Specific Services and Data Link Test Bench
BDS 7,0
Aircraft Intention 1
EUROCONTROL
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Report
Eurocontrol Format
Status bit = 0 also if data too old.
17
Data
bit no.
Status
Description
1 = valid data
SELECTED ALTITUDE
Label 102
Range = [0,65536 ft]
Status
Sign
lsb = 16 ft
1 = Valid data
SELECTED HEADING
Label 101
Range = [+-180 deg]
lsb = 0.8 deg
Status
STATUS WORD 1
Label 270
Discrete data
Status
STATUS WORD 2
Label 271
Discrete data
ARINC
bit no.
30&31
28
27
26
25
24
23
22
21
20
19
18
17
30&31
29
28
27
26
25
24
23
22
21
30&31
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
30&31
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
Mode-S Specific Services and Data Link Test Bench
BDS 7,1
EUROCONTROL
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Meteorological Report
Eurocontrol Format
Status bit = 0 also if data too old.
18
Data
bit no.
Status
Sign
Description
1 = valid data
1 = left wing down
msb = 45 deg
ROLL ANGLE
Label 325
Range =[ +-90 deg ]
Status
Sign
Status
lsb = 45/128 deg
1 = valid data
1 = down
msb = 4096 ft/min
ALTITUDE RATE or
INERTIAL VERTICAL VEL.
Label 212 or 365
Range +-8192 ft/min
lsb = 128 ft/min
1 = valid data
msb = 128 kt
WIND SPEED
Label 315
Range = 0,256 kt
Status
Sign
lsb = 1 kt
1 = valid data
1 = west
msb = 90 deg
WIND ANGLE
Label 316
Range = +-180 deg
Status
Sign
lsb = 90/1218 deg
1 = valid data
1 = -ve
msb = 256 C
STATIC AIR
TEMPERATURE
Label 213
Range +- 512 deg C
Status
Sign
lsb = 0.5 C
1 = valid data
1 = -ve
msb = 0.5 g
ACCELERATION
Label 333
lsb = 1/16 g
ARINC
bit no.
30&31
29
27
26
25
24
23
22
21
20
30&31
29
26
25
24
23
22
21
30&31
29
28
27
26
25
24
23
22
21
30&31
29
28
27
26
25
24
23
22
21
30&31
29
28
27
26
25
24
23
22
21
20
19
30&31
29
26
25
24
23
Mode-S Specific Services and Data Link Test Bench
BDS 8,0
Aircraft Intention 2
EUROCONTROL
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Report
Eurocontrol Format
Status bit = 0 also if data too old.
19
Data
bit no.
Status
Description
1 = valid data
msb = 256 kt
SELECTED AIR SPEED
Label 103
Range = [0,512 kt]
Status
Sign
lsb = 0.25 kt
1 = Valid data
1 = down
msb = 8192
SELECTED ALTITUDE
RATE
Label 104
Range = [+-16384 ft/min]
lsb = 16 ft/min
Status
msb = 32768 ft
SELECTED ALTITUDE
Label 102
Range = 0, 65536 ft
msb = 16 ft
Status
STATUS WORD 1
Label 270
Discrete data
Status
ARINC
bit no.
30&31
28
27
26
25
24
23
22
21
20
19
18
30&31
29
28
27
26
25
24
23
22
21
20
19
30&31
28
27
26
25
24
23
22
21
20
19
18
17
30 & 31
25
24
23
22
20
15
14
13
30 & 31
STATUS WORD 2
Label 271
Discrete data
27
22
21
20
Mode-S Specific Services and Data Link Test Bench
BDS 9, 0
Aircraft Intention 3
EUROCONTROL
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Report
Eurocontrol Format
Status bit = 0 also if data too old.
20
Data
bit no.
Status
Description
1 = valid data
msb = 2048 mM
SELECTED MACH
Label 106
Range = [0,4096 mM]
Status
Sign
lsb = 2 mM
1 = Valid data
1 = down
msb = 8192
SELECTED ALTITUDE
RATE
Label 104
Range = [+-16384 ft/min]
lsb = 16 ft/min
Status
msb = 32768 ft
SELECTED ALTITUDE
Label 102
Range = 0, 65536 ft
msb = 16 ft
Status
STATUS WORD 1
Label 270
Discrete data
Status
ARINC
bit no.
30&31
28
27
26
25
24
23
22
21
20
19
18
30&31
29
28
27
26
25
24
23
22
21
20
19
30&31
28
27
26
25
24
23
22
21
20
19
18
17
30 & 31
25
24
23
22
20
15
14
13
30 & 31
STATUS WORD 2
Label 271
Discrete data
27
22
21
20
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
BDS A,0 Deviation Report
Eurocontrol Format
Status bit = 0 also if data too old.
21
Data
bit no.
Status
Sign
Description
1 = valid data
msb = 64 nm
CROSS TRACK ERROR
Label 116
Range =[ 0, 128 mn] ]
Status
Sign
lsb =0.004 nm
1 = valid data
1 = low
msb = 1024 ft
VERTICAL DEVIATION
Label 117
Range = 0, 2048 ft
Status
Sign
lsb = 1 ft
1 = valid data
1 = -ve
msb = 0.5 g
BODY NORMAL
ACCELERATION
Label 333
Range = +- 1g
lsb = 1/64 g
ARINC
bit no.
30&31
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
30&31
29
28
27
26
25
24
23
22
21
20
19
18
30&31
29
26
25
24
23
22
21
Mode-S Specific Services and Data Link Test Bench
BDS B,0
EUROCONTROL
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Airspeeds Report
Eurocontrol Format
Status bit = 0 also if data too old.
22
Data
bit no.
Status
Description
1 = valid data
msb = 512 kt
COMPUTED AIR SPEED
Label 206
Range =[ 0, 1024 kt ]
Status
lsb = 0.25 kt
1 = valid data
msb = 1024 kt
TRUE AIR SPEED
Label 210
Range =[ 0, 2048 kt ]
Status
lsb = 0.5 kt
1 = valid data
msb = 2048 mM
MACH
Label 205
Range =[ 0, 4.096 ]
Status
Sign
lsb = 0.00025
1 = valid data
1 = west
msb = 90 deg
MAGNETIC HEADING
Label 320
Range =[+-180 deg ]
lsb = 90/512 deg
ARINC
bit no.
30&31
28
27
26
25
24
23
22
21
20
19
18
17
30&31
28
27
26
25
24
23
22
21
20
19
18
17
30&31
28
27
26
25
24
23
22
21
20
19
18
17
16
15
30&31
29
28
27
26
25
24
23
22
21
20
19
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
BDS C,0 Altitude Report
Eurocontrol Format
Status bit = 0 also if data too old.
23
Data
bit no.
Status
Description
1 = valid data
msb = 4096 ft
RADIO HEIGHT
Label 164
Range = 0, 8192 ft
Status
lsb = 1 ft
1 = valid data
msb = 512 mb
AVERAGE STATIC
PRESSURE
Label 246
Range 0,1024 mb
Status
lsb = 0.25 mb
1 = valid data
msb = 65536 ft
ALTITUDE
Label 203
Range = 0, 131072 ft
lsb = 1 ft
ARINC
bit no.
30&31
28
27
26
25
24
23
22
21
20
19
18
17
16
30&31
27
26
25
24
23
22
21
20
19
18
17
16
30&31
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS D,0 Intention Report 1
Eurocontrol Format
Status bit = 0 also if data too old.
24
BDS
bit 1
2
3
4
5
6
7
8
9
10
Data
bit
Status
Sign
11
12
13
14
15
16
17
18
19
20
Status
Sign
21
22
23
24
25
26
27
28
29
30
31
32
33
34
Status
Sign
35
36
37
38
39
40
41
42
43
44
Status
Sign
45
46
47
48
49
50
51
52
53
54
55
56
Status
Sign
Description
1 = valid data
msb 90 deg
SELECTED COURSE
Label 100
Range [+-180 deg ]
lsb 0.7 deg
1 = valid data
msb 90 deg
SELECTED HEADING
Label 101
Range [+-180 deg ]
lsb 0.7 deg
1 = valid data
msb 32 768 ft
SELECTED ALTITUDE
Label 102
Range [0,65 536 ft]
lsb 16 ft
1 = valid data
msb 90 deg
DESIRED TRACK
Label 114
Range [+-180 deg ]
lsb 0.7 deg
1 = valid data
msb 16339 ft/min
INERTIAL VERTICAL
VELOCITY
Label 365
Range [0,32678 ft/min]
lsb = 32 ft/min
ARINC
bit
30&31
29
28
27
26
25
24
23
22
21
30&31
29
28
27
26
25
24
23
22
21
30&31
29
28
27
26
25
24
23
22
21
20
19
18
17
30&31
29
28
27
26
25
24
23
22
21
30&31
29
28
27
26
25
24
23
22
21
20
19
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS D,1 Turn Indication Report 1
Eurocontrol Format
Status bit = 0 also if data too old.
25
BDS
bit no.
1
2
3
4
5
6
7
8
Data
bit no.
Status
Sign
9
10
11
12
13
14
15
16
17
Status
Sign
18
19
20
21
22
23
24
25
26
Status
Sign
27
28
29
30
31
32
33
34
35
36
37
38
39
40
Status
Sign
41
42
43
44
45
46
47
48
Status
49
50
51
52
53
54
55
56
Status
Description
1 = valid data
msb 22.5 deg
ROLL ANGLE
Label 325
Range [+- 45 deg ]
lsb 0.7 deg
1 = valid data
msb 56 deg/sec
ROLL RATE
Label 327
Range [0,128 deg/sec]
lsb 1 deg/sec
1 = valid data
msb 16 deg/sec
TRACK ANGLE RATE
Label 335
Range [ +- 32 deg/sec
lsb 0.25 deg/sec
1 = valid data
msb 90 deg
MAGNETIC HEADING
Label 320
Range [+-180 deg]
lsb 0.044 deg
1 = valid data
msb 0.25 g
CROSS TRACK ACCEL
Label 363
Range [0,0.5g]
lsb 0.004g
1 = valid data
msb 0.25 g
CROSS HEAD. ACCEL
Label 376
Range [0,0.5g]
lsb 0.004g
ARINC
bit no.
30&31
29
26
25
24
23
22
21
30&31
29
28
27
26
25
24
23
22
30&31
29
28
27
26
25
24
23
22
30&31
29
28
27
26
25
24
23
22
21
20
19
18
17
30&31
25
24
23
22
21
20
19
30&31
25
24
23
22
21
20
19
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS
bit 1
2
3
4
5
6
7
8
BDS D,2 Turn Indication Report 2
Eurocontrol Format
Status bit = 0 also if data too old.
Data
bit
Status
Sign
msb 22.5 deg
ROLL ANGLE
Label 325
Range [+- 45 deg ]
lsb 0.7 deg
9
10
11
12
13
14
15
16
17
26
Description
1 = valid data
msb 56 deg/sec
ROLL RATE
Label 327 or 337
Range [128 deg/sec]
lsb 1 deg/sec
18
19
20
21
22
23
24
25
26
Status
Sign
27
28
29
30
31
32
33
34
35
36
37
38
39
40
Status
Sign
41
42
43
44
45
46
47
48
Status
49
50
51
52
53
54
55
56
Status
1 = valid data
TRACK ANGLE RATE
Label 335
Range [ 0,32 deg/sec]
1 = valid data
msb 90 deg
TRACK ANGLE TRUE
Label 313
Range [+-180 deg]
lsb 0.044 deg
1 = valid data
msb 0.25 g
CROSS TRACK ACCEL
Label 363
Range [0,0.5g]
lsb 0.004 g
1 = valid data
msb 0.25 g
CROSS HEAD. ACCEL
Label 376
Range [0,0.5g]
lsb 0.004 g
ARINC
bit
30&31
29
26
25
24
23
22
21
30&31
29
28
27
26
25
24
23
22
30&31
29
28
27
26
25
24
23
22
30&31
29
28
27
26
25
24
23
22
21
20
19
18
17
30&31
25
24
23
22
21
20
19
30&31
25
24
23
22
21
20
19
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS
bit
no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
BDS 0,5 Extended Squitter Airborne Position
ModeS Specific Service Format
PURPOSE: To provide accurate airborne position
information.
TYPE coding :
0
No position information
1
Idenification (aircraft type set D)
2
Idenification (aircraft type set C)
3
Idenification (aircraft type set B)
4
Idenification (aircraft type set A)
5
Surface position
(0.001 nm)
µ ≤ 2m
6
Surface position
2m
< µ ≤ 18 m (0.01 nm)
7
Surface position
18m < µ ≤ 185 m (0.1 nm)
8
Surface position
185 m < µ
9
Airborne position *
(0.001 nm)
µ ≤ 2m
10
Airborne position * 2m
< µ ≤ 18 m (0.01 nm)
11
Airborne position * 18m < µ ≤ 185 m (0.1 nm)
12
Airborne position * 185 m < µ ≤ 740m (0.4 nm)
13
Airborne position * 740m < µ ≤ 1.85km (1 nm)
14
Airborne position * 1.85km < µ ≤ 7.4km (4 nm)
15
Airborne position * 7.4km < µ ≤ 18.5 km (10 nm)
16
Airborne position * 18.5km < µ
17
Airborne position #
(0.01nm)
µ ≤ 18 m
18
Airborne position #
18 m < µ
19
Airborne velocity information
20-28 Unassigned
29
Event-driven message C
30
Event-driven message B
31
Event-driven message A
* = 25/100 ft barometric altitude
# = GNSS height ( TBD )
µ = Horizontal position accuracy ( 95% containment value)
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Surveillance Status:
0
1
2
3
No information
Emergency conditions (ModeA codes 7700/7600/7500 )
Special position Identifier (SPI)
Change in SSR Mode A code
27
Description
TYPE
SURVEILLANCE
STATUS
Reseved for ACAS
ALTITUDE
specified by Type field
As specified in section
3.1.2.6.5.4 of Annex 10 vol
4 but with the M bit
removed
or GNSS height
Unassigned
CPR Format/Time
msb
ENCODED
LATITUDE
lsb
msb
ENCODED
LONGITUDE
lsb
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS 0,6 Extended Squitter Surface Position
ModeS Specific Service Format
PURPOSE: To provide accurate position information.
TYPE coding values :
0
No position information
1
Idenification (aircraft type set D)
2
Idenification (aircraft type set C)
3
Idenification (aircraft type set B)
4
Idenification (aircraft type set A)
5
Surface position
(0.001 nm)
µ ≤ 2m
6
Surface position
2m
< µ ≤ 18 m (0.01 nm)
7
Surface position
18m < µ ≤ 185 m (0.1 nm)
8
Surface position
185 m < µ
9
Airborne position *
(0.001 nm)
µ ≤ 2m
10
Airborne position * 2m
< µ ≤ 18 m (0.01 nm)
11
Airborne position * 18m < µ ≤ 185 m (0.1 nm)
12
Airborne position * 185 m < µ ≤ 740m (0.4 nm)
13
Airborne position * 740m < µ ≤ 1.85km (1 nm)
14
Airborne position * 1.85km < µ ≤ 7.4km (4 nm)
15
Airborne position * 7.4km < µ ≤ 18.5 km (10 nm)
16
Airborne position * 18.5km < µ
17
Airborne position #
(0.01nm)
µ ≤ 18 m
18
Airborne position #
18 m < µ
19
Airborne velocity information
20-28 Unassigned
29
Event-driven message C
30
Event-driven message B
31
Event-driven message A
* = 25/100 ft barometric altitude
# = GNSS height ( TBD )
µ = Horizontal position accuracy ( 95% containment value)
Movement values:
0
1
2-8
9-12
13-38
39-93
94-108
109-123
124
125
126
127
no information available
aircraft stopped ( ground speed < 0.125 kt )
0.125 kt (0.23 km/h) ≤ ground speed < 1 kt
1 kt (1.80 km/h) ≤ ground speed < 2 kt
2 kt (3.70 km/h) ≤ ground speed < 15 kt
15 kt ( 28 km/h) ≤ ground speed < 70 kt
70 kt ( 130 km/h) ≤ ground speed < 100 kt
100 kt ( 185 km/h) ≤ ground speed < 175 kt
ground speed ≥ 175 kt(324 km/h)
Reserved for aircraft deceleration
Reserved for aircraft acceleration
Reserved for aircraft backing up
in 0.125 kt steps
in 0.25 kt steps
in 0.5 kt steps
in 1 kt steps
in 2 kt steps
in 5 kt steps
28
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Description
TYPE
MOVEMENT
Sign bit ground track
GROUND TRACK TRUE
All zeros = no information
Range = 0, 180 degs
resolution = 180/64 deg
Unassigned
Unassigned
CPR Format/Time
msb
ENCODED
LATITUDE
Using CPR surface algorithm
lsb
msb
ENCODED
LONGITUDE
Using CPR surface algorithm
lsb
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS
bit no.
1
2
3
BDS 0,7 Extended Squitter Status
ModeS Specific Service Format
PURPOSE: To provide information on the
capability and status of the extended squitter rate of
the transponder.
Transmission rate subfield coding:
0=
1=
2=
3=
No capability to determine surface squitter rate.
High surface squitter rate selected.
Low surface squitter rate selected.
Unassigned
Altitude type subfield (ATS) coding :
0 = Barometric altitude.
1 = GNSS height.
Note : Aircraft determination of surface squitter rate.
For aircraft that have the capability to automatically determine
their surface squitter rate, the method that must be used to
switch between high and low transmission rates is as follows :
a) Switching from high to low rate:
b) Switching from low to high rate:
I) the aircraft’s position has changed by 10 metres or more
since the low rate was selected; or
ii) the aircraft’s ground speed exceeds one knot.
29
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Description
TRANSMISSION RATE
SUBFIELD (TRS)
ATS Altitude type
subfield
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
BDS 1,0 Data Link Capability Report
ModeS Specific Service Format
Purpose: To report the data link capability of the Mode
S transponder /data link installation, in accordance with
section 5.2.9 of the Mode S subnetwork SARPs ( see
paragraph 1.8 ).
Notes :
1) The Mode S subnetwork SARPs must be consulted for
the full definition of BDS 1,0.
2) Bit 25 is used as a status bit for all BDS buffers.
3) Starting from the Msb, each subsequent bit position
represents the DTE subaddresses in the range from 0 to
15.
4) The enhanced protocol indicator denotes a Level 5
transponder when set to 1 and a Level 2 to 4
transponder when set to 0.
5) The squitter capability subfield (SCS) is interpreted
as follows:
0 = squitter registers are not updated
1 = squitter registers are being updated.
6) The surveillance identifier (SI) bit is interpreted as
follows:
0 = no surveillance identifier code capability
1 = surveillance identifier code capability
7) Bit 36 is toggled to indicate that the common usage
GICB capability report (BDS 17) has changed. To avoid
the generation of too many broadcast capability report
changes, BDS 1,7 should be sampled at approximately
one-minute intervals to check for changes.
30
Data
Description
Bit
BDS
Label 1,0
0
0
0
1
0
0
0
0
Continuation flag
Reserved for ACAS
Mode S subnetwork
version number
Transponder enhanced protocol indicator
Note 4
ModeS specific services capability
Uplink ELM capability
Downlink ELM capability
Aircraft Identification capability
Squitter capability subfield(SCS)
Surveillance identifier
Common usage GICB capability report
Reserved for ACAS
Msb
Bit array indicating the support
status of DTE subaddresses
0 to 15
Lsb
Note 5
Note 6
Note 7
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS 2,0 Aircraft Identity
ModeS Specific Service Format
Purpose: To report aircraft identification to the ground in
accordance with Annex.10 Volume IV, section 3.1.2.9
Notes:
1) Annex 10, Volume IV, section 3.1.2.9 provides a full
definition of BDS 2,0
2) The character coding to be used is identical to taht
defined in Table 3-6 of Chapter 3, Annex 10, Volume IV.
3) This data may be input to ther transponder from
sources other than the Mode S ADLP.
4) This format is used by the extended squitter
application.
31
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Data
Description
Bit
BDS
Label 2,0
0
0
1
0
0
0
0
0
Character 1
see Note 2
Character 2
see Note 2
Character 3
see Note 2
Character 4
see Note 2
Character 5
see Note 2
Character 6
see Note 2
Character 7
see Note 2
Character 8
see Note 2
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS 4,0 Aircraft intention
Purpose: To provide ready access to information about
an aircraft’s short-term intentions, in order to improve
the effectiveness of conflict probes and to provide
additional tactical information to controllers.
Notes:
1) The data entered into this register should be derived
from the sources that are controlling the aircraft.
2) Selected course/heading and selected airspeed/mach
are switchable, with an extra switch bit to indicate which
parameter is in use. It is defined as follows:
SWITCH bit
Course/heading
Airspeed/Mach
0
Course
Airspeed
1
Heading
Mach
32
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Data
Status
Sign
Description
1 = valid data
msb = 32768 ft
SELECTED ALTITUDE
Label 102
Range =[ 0, 65520 ft ]
lsb = 16 ft
1 = valid data
Sign 1 = minus
msb = 8192 ft/min
SELECTED ALTITUDE
RATE
Label 104
Range = [+- 16352 ft/min ]
lsb = 32 ft/min
SWITCH
STATUS
SIGN
msb = 90 deg
SELECTED MAGNETIC
COURSE / HEADING
Label 100 / 101
Range = [+-180 deg]
lsb = 360/512 deg
SWITCH
STATUS
msb = 256 kt/Mach 2048
SELECTED
AIRSPEED/MACH
Label 103 / 106
Range = [ 0,512 kt]
or [0,4.096 Mach]
lsb = 0.5 kt/Mach 0.004
STATUS of MODE Fields
MODE
SELECTED ALTITUDE
MODE
SELECTED ALTITUDE RATE
MODE
SELECT. COURSE/HEADING
MODE
SELECTED AIRSPEED/MACH
ARINC
bit no.
30&31
28
27
26
25
24
23
22
21
20
19
18
17
30&31
29
27
26
25
24
23
22
21
20
19
30&31
29
28
27
26
25
24
23
22
21
30&31
27
26
25
24
23
22
21
20
19
18
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
BDS 4,3 Aircraft intention
ModeS Specific Service Format
Purpose: To provide ready access to details about the
next waypoint on an aircraft’s route, without the need to
establish a data link dialogue with the flight management
system. This will assist with short and medium term
tactical control.
Note:
Time to go and Distance to go are Binary Coded
Decimal values, where each decimal digit requires 4 bits
of data.
33
Data
Status
Sign
Description
1 = valid data
Msb=90 deg.
BEARING TO WAYPOINT
Label 115
Range=[+-180 deg.]
Status
Lsb= 360/2048 degs.
1 = valid data
10 min. digit
TIME TO GO
Label 002 (BCD)
1 min.
Range=[0, 99.9 min]
0.1 min
Status
1 = valid data
100 nm. digit
DISTANCE TO GO
10 nm.
Label 001 (BCD)
Range=[0,999.9 nm]
1 nm.
0.1 nm.
UNASSIGNED
ARINC
bit no.
30&31
29
28
27
26
25
24
23
22
21
20
19
30&31
29
28
27
26
25
24
23
22
21
20
19
18
30&31
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS 4,4 Meteorological Routine Report
Purpose: To allow meteorological data to be collected
by ground systems.
The decimal value of the binary coded ( figure of merit )
FOM/SOURCE parameter must be interpreted as
follows:
0
1
2
3
4
5-15
= Invalid
= INS
= GNSS
= DME/DME
= VOR/DME
= Unassigned
Notes:
1) ARINC 429 label 315 only supplies data with an MSB
of 128. When using this data source, bit 6 in the MB field
is not used and must be set to 0.
2) The interpretation of the two bits assigned to
TURBULENCE is as shown in the table for BDS 4,5.
3) The average static pressure is not a requirement of
Annex 3.
34
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Data
Description
ARINC
bit no.
FOM/SOURCE
Status
Wind parameters
MSB = 256 kt
WINDSPEED
Label 315
Range = [0,512 kt ]
lsb = 1 kt
Sign
msb = 90 deg.
WIND DIRECTION
Label 316
Range = [+-180 deg]
lsb = 180/256 deg
Status
Sign
msb = 64 deg C
STATIC AIR TEMPERATURE
Label 213
Range = [+-128 C ]
lsb = 0.25 C
Status
msb = 1024 hPa
AVERAGE STATIC
PRESSURE
Label 217
Range = [2048 hPa]
lsb = 1 hPa
Status
TURBULENCE
Status
msb = 100%
HUMIDITY
lsb = 100/64%
28
27
26
25
24
23
22
21
20
29
28
27
26
25
24
23
22
21
30&31
29
26
25
24
23
22
21
20
19
18
30&31
28
27
26
25
24
23
22
21
20
19
18
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS 4,5 Meteorological Hazard Report
ModeS Specific Service Format
Purpose: To provide reports on the severity of
meteorological hazards, in particular for low flight.
The interpretation of the two bits assigned to each hazard
is defined in the table below:
Bit 1
0
0
1
1
Bit 2
0
1
0
1
Nil
Light
Moderate
Severe
Note : The definition of the terms Light, Moderate, and
Severe are those defined in the PANS-RAC ( Doc.4444)
where applicable.
35
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Data
Status
Description
ARINC
bit no.
1 = valid data
TURBULENCE
Status
WIND SHEAR
Status
MICROBURST
Status
ICING
Status
WAKE VORTEX
Status
Sign
Msb = 64 deg c
STATIC AIR TEMPERATURE
Label 213
Range = [ +- 128 deg C]
Lsb = 0.25 deg C
Status
Msb = 1024 hPa
AVERAGE STATIC
PRESSURE
Label 217
Range = 0, 2048 hPa
Lsb = 1 hPa
Status
Msb = 32 768 ft
RADIO HEIGHT
Label 164
Range = 0, 65 528 ft
Lsb = 16 ft
30&31
29
28
27
26
25
24
23
22
21
20
30&31
28
27
26
25
24
23
22
21
20
19
18
30&31
28
27
26
25
24
23
22
21
20
19
18
17
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS 5,0 Track and turn report
Mode S Specific Services Format
1. All references to ARINC assume that the ARINC 429
standard is used.
2. The BDS servicing process will make a logical AND
of bits 30 & 31 of each ARINC parameter and insert the
result into the status bit for the corresponding parameter.
3. The maximum acceptable data age at time of
transmission to the ground is 1 s for all parameters.
4. The BDS update rate will be sufficient to ensure that
the maximum acceptable data age of all parameters is not
exceeded in normal operation.
5. If maximum acceptable data age is exceeded for any
parameter, then the status bit for that parameter should
actively be set to 0 by the BDS processing service.
6. If the value of a parameter from the data source
exceeds the range allowable in the BDS definition, the
maximum allowable value in the correct positive or
negative sense will be used instead.
Notes:
1) The data entered into this register should, whenever
possible, be derived from the sources that are
controlling the aircraft.
2) This requires active intervention by the BDS servicing
process.
3) Where ARINC 429 is used, this only relates to
parameters where the most significant bit or bits have
been omitted from the BDS format.
7. If any parameter is not available on the aircraft, all bits
corresponding to that parameter must be actively set to 0
by the BDS servicing process.
Note : If any parameter becomes unavailable
due to abnormal operation, then item 5 above applies.
36
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Data
bit no.
Status
Sign
Description
1 = valid data
1 = left (left wing down )
msb = 45 deg
ROLL ANGLE
Label 325
Range =[ +- 90deg ]
Status
Sign
lsb = 45/256 deg
1 = valid data
1 = west ( e.g. 315 = -45 deg)
msb = 90 deg
TRUE TRACK ANGLE
Label 313
Range =[ +- 180 deg ]
Status
lsb = 90/512 deg
1 = valid data
msb = 1024 kts
GROUND SPEED
Label 312
Range = [0,2046 ]
lsb = 2 kt
1 = valid data
1 = minus
msb = 8 deg/sec
TRACK ANGLE RATE
Label 335
Range = [-16,+16]
lsb = 8/256
1 = valid data
msb = 1024 kt
TRUE AIR SPEED
Label 210
Range =[0,2046]
lsb = 2 kt
ARINC
bit no.
30&31
29
27
26
25
24
23
22
21
20
19
30&31
29
28
27
26
25
24
23
22
21
20
19
30&31
27
26
25
24
23
22
21
20
19
18
30&31
29
27
26
25
24
23
22
21
20
19
30&31
28
27
26
25
24
23
22
21
20
19
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
BDS 5, 1 Position Report Coarse
ModeS Specific Service Format
PURPOSE: To provide a three-dimensional report on
aircraft position.
Notes :
1) The single status bit ( bit 1 ) is to be set to 0 if any of
the three parameters are invalid and are identical to the
status bit in BDS 5,2.
2) The required valid range for latitude is +90 degrees
to - 90 degrees, but the parameter is coded with an msb
of 90 degrees to allow the use of the same coding
algorithm as for longitude.
3) The source of the information in this buffer is the
same as that indicated in the FOM/SOURCE field of
BDS 5,2.
37
Data
Status
Sign
Description
1 = valid data
msb = 90 deg
LATITUDE
Range =[ +-180 deg ]
lsb = 360/1048576 deg
Sign
msb = 90 deg
LONGITUDE
Range =[ +-180 deg ]
lsb = 360/1048576 deg
Sign
msb = 65536 ft
PRESSURE
ALTITUDE
Range = 131068 ft
lsb = 8 ft
ARINC
bit no.
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS 5, 2 Position Report Fine
ModeS Specific Service Format
PURPOSE: To provide a high precisionthreedimensional report on aircraft position, when used in
conjunction with BDS 5,1. Information on the source of
data is included.
The decimalvalue of the binary coded ( figure of merit )
FOM/SOURCE parameter is to be interpreted as follows:
0
1
2
3
4
5
6 - 10
11
12
13
14-15
= Loss of navigational capability.
= RNP 20 (e.g. INS data) pressure altitude.
= RNP 5 (e.g. VOR/DME) pressure altitude
= RNP 1 (e.g DME/DME or GNSS) pressure
altitude
= Reserved for differential GNSS ( circular
position error (CPE) 10m) pressure altitude.
= Reserved for differential GNSS (CPE 2.5 m)
pressure altitude.
= Unassigned
= RNP 1 ( e.g. DME/DME or GNSS) GNSS
height
= Reserved for differential GNSS (CPE 10 m)
height.
= Reserved for differential DGNSS (CPE 2.5 m)
height
= Unassigned.
where RNP is required navigational performance as
defined by ICAO. Suitable RNP categories have not yet
been defined for values below 1; therfore CPE is used.
The single status bit (bit 1) is to be set to 0 if any of the
three parameters are invalid and are identical to the
status bit in BDS 5,1.
Notes :
1) The LATITUDE (fine) and LONGITUDE (fine)
parameters are in 2’s complement coding, so they must
be interpreted in conjunction with the corresponding
parameters BDS 5,1.
2) When GNSS height is contained in the altitude field,
the pressure altitude can be obtained from BDS 5,1.
38
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Data
bit no.
Status
Description
1 = valid data
FOM/SOURCE
msb = 90/128 deg
LATITUDE FINE
Range = 180/128 deg
lsb = 90/16777216 deg
msb = 90/128 deg
LONGITUDE FINE
Range = 180/128 deg
lsb = 90/16777216 deg
Sign
msb = 65536 ft
PRESSURE
ALTITUDE
Range = 131068 ft
lsb = 8 ft
ARINC
bit no.
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS 5,3 Air-referenced State Vector
ModeS Specific Service Format
PURPOSE: To provide the ATC system with the current
measured values of magnetic heading, IAS/Mach,
altitude rate and TAS.
39
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Data
bit no.
Status
Sign
Description
1 = valid data
msb = 90 deg
MAGNETIC HEADING
Label 320
Range =[ +-180 deg ]
Status
lsb = 360/2048 deg
1 = valid data
msb = 512 kt
INDICATED AIRSPEED (IAS)
Label 206
Range = 0, 1024 kt
Status
lsb = 1 kt
1 = valid data
msb = 2.048
MACH NUMBER
Label 205
Range = 0, 4.096
Status
lsb = 0.008
1 = valid data
msb = 1024 kt
TRUE AIRSPEED (TAS)
Range = 0,2048 kt
Status
Sign
lsb = 0.5 kt
1 = valid data
msb = 8192 ft/min
ALTITUDE RATE
Label 212
Range = +- 16384 ft/min
msb = 64 ft/min
ARINC
bit no.
30&31
29
28
27
26
25
24
23
22
21
20
19
30&31
28
27
26
25
24
23
22
21
20
19
30&31
28
27
26
25
24
23
22
21
20
30&31
28
27
26
25
24
23
22
21
20
19
18
17
30&31
29
28
27
26
25
24
23
22
21
Mode-S Specific Services and Data Link Test Bench
EUROCONTROL
BDS 6,0 Heading and speed report
ModeS Specific Service Format
1. All references to ARINC assume that the ARINC 429
standard is used.
2. The BDS servicing process will make a logical AND
of bits 30 & 31 of each ARINC parameter and insert the
result into the status bit for the corresponding parameter.
3. The maximum acceptable data age at time of
transmission to the ground is 1 s for all parameters.
4. The BDS update rate will be sufficient to ensure that
the maximum acceptable data age of all parameters is not
exceeded in normal operation.
5. If maximum acceptable data age is exceeded for any
parameter, then the status bit for that parameter should
actively be set to 0 by the BDS processing service.
6. If the value of a parameter from the data source
exceeds the range allowable in the BDS definition, the
maximum allowable value in the correct positive or
negative sense will be used instead.
Notes:
1) The data entered into this register should, whenever
possible, be derived from the sources that are
controlling the aircraft.
2) This requires active intervention by the BDS servicing
process.
3) Where ARINC 429 is used, this only relates to
parameters where the most significant bit or bits have
been omitted from the BDS format.
7. All parameters are required except for Inertial
Vertical Velocity which will be supplied only by aircraft
with a suitable inertial source. If Inertial Vertical
Velocity is not available bits 46 to 56 inclusive must be
actively set to 0 by the BDS servicing process.
40
BDS
bit no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Data
bit no.
Status
Sign
Description
1 = valid data
1 = west
msb = 90 deg
MAGNETIC HEADING
Label 320
Range =[ +-180 deg ]
Status
lsb = 90/512 deg
1 = valid data
msb = 512 kt
INDICATED AIRSPEED
Label 206
Range = [0, 1023]
Status
lsb = 1kt
1 = valid data
msb = 2.048 mach
MACH NUMBER
Label 205
Range = [0, 4.096 ]
Status
Sign
lsb = 2.048/512
1 = valid data
1 = below
msb = 8192 ft/min
BAROMETRIC ALTITUDE
RATE
Label 212
Range = [-16384, +16352 ]
Status
Sign
lsb = 32 ft/min
1 = valid data
1 = below
msb = 8192 ft/min
INERTIAL VERTICAL
VELOCITY
Label 365
Range = [-16384, +16352 ]
lsb = 32 ft/min
ARINC
bit no.
30&31
29
28
27
26
25
24
23
22
21
20
19
30&31
28
27
26
25
24
23
22
21
20
19
30&31
28
27
26
25
24
23
22
21
20
19
30&31
29
27
26
25
24
23
22
21
20
19
30&31
29
27
26
25
24
23
22
21
20
19
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement