BX982 GNSS Receiver Module User Guide

USER GUIDE
Trimble BX982
GNSS Receiver Enclosure
Version 5.11
Revision A
December 2015
1
Corporate Office
Trimble Navigation Limited
Integrated Technologies
510 DeGuigne Drive
Sunnyvale, CA 94085
USA
www.trimble.com/gnss-inertial
Email: GNSSOEMSupport@trimble.com
Legal Notices
© 2006–2015, Trimble Navigation Limited. All rights reserved.
Trimble and the Globe & Triangle logo are trademarks of Trimble
Navigation Limited, registered in the United States and in other
countries. CMR+, EVEREST, Maxwell, and Zephyr are trademarks of
Trimble Navigation Limited.
Microsoft, Internet Explorer, Windows, and Windows Vista are either
registered trademarks or trademarks of Microsoft Corporation in the
United States and/or other countries.
All other trademarks are the property of their respective owners.
Support for Galileo is developed under a license of the European Union
and the European Space Agency
(BD910/BD920/BD930/BD935/BD970/BD982/BX935/BX982).
Release Notice
This is the December 2015 release (Revision A) of the BX982 GNSS
Receiver Enclosure User Guide. It applies to version 5.11 of the receiver
firmware.
LIMITED WARRANTY TERMS AND CONDITIONS
Product Limited Warranty
Subject to the following terms and conditions, Trimble Navigation
Limited (“Trimble”) warrants that for a period of one (1) year from date
of purchase unless otherwise specified, this Trimble product (the
“Product”) will substantially conform to Trimble's publicly available
specifications for the Product and that the hardware and any storage
media components of the Product will be substantially free from defects
in materials and workmanship.
Product Software
Product software, whether built into hardware circuitry as firmware,
provided as a standalone computer software product, embedded in flash
memory, or stored on magnetic or other media, is licensed solely for use
with or as an integral part of the Product and is not sold. If accompanied
by a separate end user license agreement (“EULA”), use of any such
software will be subject to the terms of such end user license agreement
(including any differing limited warranty terms, exclusions, and
limitations), which shall control over the terms and conditions set forth in
this limited warranty.
Software Fixes
During the limited warranty period you will be entitled to receive such
Fixes to the Product software that Trimble releases and makes
commercially available and for which it does not charge separately,
subject to the procedures for delivery to purchasers of Trimble products
generally. If you have purchased the Product from an authorized
Trimble dealer rather than from Trimble directly, Trimble may, at its
option, forward the software Fix to the Trimble dealer for final
distribution to you. Minor Updates, Major Upgrades, new products, or
substantially new software releases, as identified by Trimble, are
expressly excluded from this update process and limited warranty.
Receipt of software Fixes or other enhancements shall not serve to
extend the limited warranty period.
For purposes of this warranty the following definitions shall apply: (1)
“Fix(es)” means an error correction or other update created to fix a
previous software version that does not substantially conform to its
Trimble specifications; (2) “Minor Update” occurs when enhancements
are made to current features in a software program; and (3) “Major
Upgrade” occurs when significant new features are added to software,
or when a new product containing new features replaces the further
development of a current product line. Trimble reserves the right to
determine, in its sole discretion, what constitutes a Fix, Minor Update, or
Major Upgrade.
Warranty Remedies
If the Trimble Product fails during the warranty period for reasons
covered by this limited warranty and you notify Trimble of such failure
during the warranty period, Trimble will repair OR replace the
nonconforming Product with new, equivalent to new, or reconditioned
parts or Product, OR refund the Product purchase price paid by you, at
Trimble’s option, upon your return of the Product in accordance with
Trimble's product return procedures then in effect.
How to Obtain Warranty Service
To obtain warranty service for the Product, please contact your local
Trimble authorized dealer. Alternatively, you may contact Trimble to
request warranty service by e-mailing your request to
GNSSOEMSupport@trimble.com . Please be prepared to provide:
– your name, address, and telephone numbers
– proof of purchase
– a copy of this Trimble warranty
– a description of the nonconforming Product including the model
number
– an explanation of the problem
The customer service representative may need additional information
from you depending on the nature of the problem.
Warranty Exclusions or Disclaimer
This Product limited warranty shall only apply in the event and to the
extent that (a) the Product is properly and correctly installed, configured,
interfaced, maintained, stored, and operated in accordance with
Trimble's applicable operator's manual and specifications, and; (b) the
Product is not modified or misused. This Product limited warranty shall
not apply to, and Trimble shall not be responsible for, defects or
performance problems resulting from (i) the combination or utilization of
the Product with hardware or software products, information, data,
systems, interfaces, or devices not made, supplied, or specified by
Trimble; (ii) the operation of the Product under any specification other
than, or in addition to, Trimble's standard specifications for its products;
(iii) the unauthorized installation, modification, or use of the Product; (iv)
damage caused by: accident, lightning or other electrical discharge, fresh
or salt water immersion or spray (outside of Product specifications); or
exposure to environmental conditions for which the Product is not
intended; (v) normal wear and tear on consumable parts (e.g.,
batteries); or (vi) cosmetic damage. Trimble does not warrant or
guarantee the results obtained through the use of the Product, or that
software components will operate error free.
NOTICE REGARDING PRODUCTS EQUIPPED WITH TECHNOLOGY CAPABLE OF
TRACKING SATELLITE SIGNALS FROM SATELLITE BASED AUGMENTATION
SYSTEMS (SBAS) (WAAS/ EGNOS, AND MSAS), OMNISTAR, GPS, MODERNIZED
GPS OR GLONASS SATELLITES, OR FROM IALA BEACON SOURCES: TRIMBLE IS
NOT RESPONSIBLE FOR THE OPERATION OR FAILURE OF OPERATION OF ANY
SATELLITE BASED POSITIONING SYSTEM OR THE AVAILABILITY OF ANY
SATELLITE BASED POSITIONING SIGNALS.
THE FOREGOING LIMITED WARRANTY TERMS STATE TRIMBLE’S ENTIRE LIABILITY, AND
YOUR EXCLUSIVE REMEDIES , RELATING TO THE TRIMBLE PRODUCT. EXCEPT AS
OTHERWISE EXPRESSLY PROVIDED HEREIN, THE PRODUCT, AND ACCOMPANYING
DOCUMENTATION AND MATERIALS ARE PROVIDED “AS -IS ” AND WITHOUT EXPRESS
OR IMPLIED WARRANTY OF ANY KIND, BY EITHER TRIMBLE OR ANYONE WHO HAS BEEN
INVOLVED IN ITS CREATION, PRODUCTION, INSTALLATION, OR DISTRIBUTION,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND NONINFRINGEMENT. THE
STATED EXPRESS WARRANTIES ARE IN LIEU OF ALL OBLIGATIONS OR LIABILITIES ON
THE PART OF TRIMBLE ARISING OUT OF , OR IN CONNECTION WITH, ANY PRODUCT.
BECAUSE SOME STATES AND JURISDICTIONS DO NOT ALLOW LIMITATIONS ON
DURATION OR THE EXCLUSION OF AN IMPLIED WARRANTY, THE ABOVE LIMITATION
MAY NOT APPLY OR FULLY APPLY TO YOU.
Limitation of Liability
TRIMBLE'S ENTIRE LIABILITY UNDER ANY PROVISION HEREIN SHALL BE LIMITED TO THE
AMOUNT PAID BY YOU FOR THE PRODUCT. TO THE MAXIMUM EXTENT PERMITTED BY
APPLICABLE LAW, IN NO EVENT SHALL TRIMBLE OR ITS SUPPLIERS BE LIABLE FOR ANY
INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGE WHATSOEVER UNDER
ANY CIRCUMSTANCE OR LEGAL THEORY RELATING IN ANYWAY TO THE PRODUCTS ,
SOFTWARE AND ACCOMPANYING DOCUMENTATION AND MATERIALS , (INCLUDING,
WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS , BUSINESS
INTERRUPTION, LOSS OF DATA , OR ANY OTHER PECUNIARY LOSS ), REGARDLESS OF
WHETHER TRIMBLE HAS BEEN ADVISED OF THE POSSIBILITY OF ANY SUCH LOSS AND
REGARDLESS OF THE COURSE OF DEALING WHICH DEVELOPS OR HAS DEVELOPED
BETWEEN YOU AND TRIMBLE. BECAUSE SOME STATES AND JURISDICTIONS DO NOT
ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR
INCIDENTAL DAMAGES , THE ABOVE LIMITATION MAY NOT APPLY OR FULLY APPLY TO
YOU.
BX982 GNSS Receiver Enclosure User Guide
2
PLEASE NOTE: THE ABOVE TRIMBLE LIMITED WARRANTY PROVISIONS WILL
NOT APPLY TO PRODUCTS PURCHASED IN THOSE JURISDICTIONS (E.G.,
MEMBER STATES OF THE EUROPEAN ECONOMIC AREA) IN WHICH PRODUCT
WARRANTIES ARE THE RESPONSIBILITY OF THE LOCAL TRIMBLE AUTHORIZED
DEALER FROM WHOM THE PRODUCTS ARE ACQUIRED. IN SUCH A CASE,
PLEASE CONTACT YOUR LOCAL TRIMBLE AUTHORIZED DEALER FOR
APPLICABLE WARRANTY INFORMATION .
Official Language
THE OFFICIAL LANGUAGE OF THESE TERMS AND CONDITIONS IS ENGLISH. IN THE
EVENT OF A CONFLICT BETWEEN ENGLISH AND OTHER LANGUAGE VERSIONS , THE
ENGLISH LANGUAGE SHALL CONTROL.
COCOM limits
This notice applies to the BD910, BD920, BD920-W, BD920-W3G, BD930,
BD930-UHF, BD935-INS, BD960, BD970, BD982, BX960, BX960-2, and
BX982 receivers.
The U.S. Department of Commerce requires that all exportable GPS
products contain performance limitations so that they cannot be used in
a manner that could threaten the security of the United States. The
following limitations are implemented on this product:
– Immediate access to satellite measurements and navigation results is
disabled when the receiver velocity is computed to be greater than
1,000 knots, or its altitude is computed to be above 18,000 meters. The
receiver GPS subsystem resets until the COCOM situation clears. As a
result, all logging and stream configurations stop until the GPS
subsystem is cleared.
Restriction of Use of Certain Hazardous Substances in Electrical
and Electronic Equipment (RoHS)
Trimble products in this guide comply in all material respects with
DIRECTIVE 2002/95/EC OF THE EUROPEAN PARLIAMENT AND OF THE
COUNCIL of 27 January 2003 on the restriction of the use of certain
hazardous substances in electrical and electronic equipment (RoHS
Directive) and Amendment 2005/618/EC filed under C(2005) 3143, with
exemptions for lead in solder pursuant to Paragraph 7 of the Annex to
the RoHS Directive applied.
Waste Electrical and Electronic Equipment (WEEE)
For product recycling instructions and more information,
please go to
www.trimble.com/Corporate/Environmental_
Compliance.aspx .
Recycling in Europe: To recycle Trimble WEEE (Waste
Electrical and Electronic Equipment, products that run on
electrical power.), Call +31 497 53 24 30, and ask for the “WEEE
Associate”. Or, mail a request for recycling instructions to:
Trimble Europe BV
c/o Menlo Worldwide Logistics
Meerheide 45
5521 DZ Eersel, NL
BX982 GNSS Receiver Enclosure User Guide
3
Contents
Contents
4
1 Introduction
5
About the BX982 receiver
BX982 features
Receiver architecture
Configuring the BX982 receiver
Technical support
6
6
8
9
11
2 Specifications
12
Performance specifications
Physical specifications
Electrical specifications
Environmental specifications
Communication specifications
Receiver drawings
BX982 receiver pinout information
13
15
15
16
17
18
19
3 Troubleshooting Receiver Issues
22
Glossary
24
BX982 GNSS Receiver Enclosure User Guide
4
CHAPTER
1
Introduction
n
About the BX982 receiver
n
BX982 features
n
Receiver architecture
n
Configuring the BX982 receiver
n
Technical support
This manual describes how to set up, configure,
and use the Trimble® BX982 GNSS receiver module.
The receiver uses advanced navigation architecture
to achieve real-time centimeter accuracies with
minimal latencies.
Even if you have used other GNSS or GPS products
before, Trimble recommends that you spend some
time reading this manual to learn about the special
features of this product. If you are not familiar with
GNSS or GPS, visit the Trimble website
(www.trimble.com).
BX982 GNSS Receiver Enclosure User Guide
5
1 Introduction
About the BX982 receiver
The BX982 receiver enclosure allows OEM and system integrator customers to rapidly integrate high
accuracy GNSS into their applications. The receiver can be used as either a base station or a rover
and is also suited for applications that require precise heading and attitude information in addition
to position.
The receiver provides reliable operation in all environments, and a positioning interface to an office
computer, external processing device, or control system. You can control the receiver through a
serial or Ethernet port using binary interface commands or the web interface.
Note – Use the information in this manual with the BD982 GNSS Receiver User Guide.
BX982 features
The receiver has the following features:
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Position antenna based a on 220-channel Trimble Maxwell™ 6 chip:
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GPS: Simultaneous L1 C/A, L2E, L2C, L5
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GLONASS: Simultaneous L1 C/A, L1 P, L2 C/A L2 P
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SBAS: Simultaneous L1 C/A, L5
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GALILEO: Simultaneous L1 BOC, E5A, E5B, E5AltBOC
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BeiDou: Simultaneous B1, B2
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QZSS: Simultaneous L1 C/A, L1 SAIF, L2C, L5
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L-Band OmniSTAR VBS, HP, and XP
Vector antenna based on a second 220-channel Maxwell 6 chip:
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GPS: Simultaneous L1 C/A, L2E, L2C
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GLONASS: Simultaneous L1 C/A, L1 P, L2 C/A, L2 P
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BeiDou: Simultaneous B1
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Advanced Trimble Maxwell 6 Custom Survey GNSS Technology
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Very low noise GNSS carrier phase measurements with <1 mm precision in a 1 Hz bandwidth
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Proven Trimble low elevation tracking technology
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1 USB port
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1 CAN port
BX982 GNSS Receiver Enclosure User Guide
6
1 Introduction
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1 LAN Ethernet port:
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HTTP (web interface)
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NTP Server
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NMEA, GSOF, CMR over TCP/IP or UDP
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NTripCaster, NTripServer, NTripClient
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mDNS/UPnP Service discovery
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Dynamic DNS
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Email alerts
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Network link to Google Earth
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Support for external modems through PPP
3 × RS-232 ports (baud rates up to 460,800)
1 Hz, 2 Hz, 5 Hz, 10 Hz, 20, and 50 Hz positioning and heading outputs (depending on the
installed option)
Up to 50 Hz raw measurement and position outputs
Correction inputs/outputs: CMR, CMR+™, sCMRx, RTCM 2.1, 2.2, 2.3, 2.4, 3.X, and 3.2.
Note:
l
The functionality to input or output any of these corrections depends on the installed
options.
Different manufacturers may have established different packet structures for their
correction messages. Thus, the BD9xx receivers may not receive corrections from other
manufacturers' receivers, and other manufacturers' receivers may not be able to receive
corrections from BD9xx receivers.
Navigation outputs:
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All functions are performed through a single IP address simultaneously—including web
interface access and raw data streaming
Network Protocols supported:
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Supports links to 10BaseT/100BaseT networks
ASCII: NMEA-0183: GBS; GGA; GLL; GNS; GRS; GSA; GST; GSV; HDT; LLQ; PTNL,AVR;
PTNL,BPQ; PTNL,DG; PFUGDP; DTM; PTNL,GGK; PTNL,PJK; PTNL,PJT, PTNL,VGK; PTNL,VHD;
RMC; ROT; VTG; ZDA.
Binary: Trimble GSOF
Control software: HTML Web browser (Google Chrome (recommended), Internet Explorer®,
Mozilla Firefox, Apple Safari, Opera)
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1 pulse-per-second (1PPS) output
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LED drive support
BX982 GNSS Receiver Enclosure User Guide
7
1 Introduction
Receiver architecture
The BX982 receiver provides an enclosure for a single BD982 GNSS receiver. Simply connect power
and antennas to create a complete GNSS system. Three LEDs indicate power, differential
corrections, and satellite tracking status. Access to serial, Ethernet, and 1PPS is available through DB
connectors.
When computing offsets from the main antenna to the point of interest at the vector antenna, or
for consistent vehicle orientation, heading information is critical. The BX982 receiver contains a
single BD982 receiver that can provide accuracy information between its two antennas. The
technique of moving base RTK provides an accurate vector between the two antennas—primary
(position) and secondary (vector). Moving base RTK vector outputs can be sent in ASCII or binary
format through the board’s serial ports.
BX982 GNSS Receiver Enclosure User Guide
8
1 Introduction
Configuring the BX982 receiver
Use this manual with the BD982 GNSS Receiver User Guide. All firmware features and software
configuration utilities are documented in that manual.
The connectors support the following I/O. For more information, see BX982 receiver pinout
information, page 19.
BX982 receiver I/O
Type
Connector
Serial Port 1
DB26 connector labeled Data/Power
Serial Port 2
Ethernet
USB
1PPS
Serial Port 4
DB9 connector labeled Port 4
CAN
DB9 connector labeled CAN
Configuring the BX982 receiver to output reference station
data
1. Connect the computer to the DB9 port labeled GPS4 or use the provided adapter cable to
connect to the DB26 port labeled Data/Power.
2. Do one of the following:
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Enter a base station position using known coordinates (Web interface or binary
commands).
Select the Here position (Web interface only), to set the base station position.
3. Use the Web interface or binary commands to enable CMR or RTCM outputs from serial Ports
1/Port 2 (using the Data/Power connector) or from serial Port 4.
BX982 GNSS Receiver Enclosure User Guide
9
1 Introduction
Configuring the BX982 receiver to output rover RTK positions
1. Supply differential data to either the DB9 port labeled Port 4 or the DB26 port labeled
Data/Power through Port 1, Port 2, Ethernet, or USB (depending on the available connector
type).
If there is an antenna attached, the differential data (middle) LED on receiver 1 lights up. This
shows that you are receiving valid differential data. It does not show that you are computing a
fixed solution. For additional details on LED functionality, operation and troubleshooting, refer
to the Configuring the Receiver section of the www.trimble.com/OEM_receiverHelp/.
2. Connect the computer to the DB9 port labeled Port 4 or use the provided cable to connect to
the DB26 port labeled Data/Power.
3. Use the Web interface to ensure that you are computing fixed solutions – RTK fix mode.
4. Use the Web interface or binary commands to enable the required ASCII (NMEA) or Binary
(Data Collector Format Report Packets) messages from serial port 1, 2, 4, Ethernet, or USB.
Configuring the BX982 receiver to output heading data
1. Connect the computer to the DB9 port labeled Port 4 or use the provided adapter cable to
connect to the DB26 port labeled Data/Power.
The internal BD982 receiver automatically calculates heading between both its antennas
(internal vector relative to true North) when both the antennas are connected and are tracking
satellites.
2. When both the primary (position) and secondary (vector) antenna are connected, the receiver
calculates the internal vector and heading. This can be confirmed by looking at the satellitetracking LED on the device that displays the following blinking pattern: It blinks at 1 Hz for a 5
second interval, followed by a short high-frequency LED blinking burst.
3. Use the Web interface or binary commands to enable either:
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ASCII messages (NMEA AVR/HDT – Internal vector; or NMEA VHD – External vector
between primary position antenna of the BX982 and an external base station)
Binary (Report Packet 40h, Type 27 record) messages from any of the serial ports, Ethernet
or USB outputs.
For more information
For more advanced information on how to configure the receivers inside the BX982 receiver
enclosure, refer to the Configuring the Receiver section of the www.trimble.com/OEM_
receiverHelp/.
BX982 GNSS Receiver Enclosure User Guide
10
1 Introduction
Technical support
If you have a problem and cannot find the information you need in the product documentation,
send an email to GNSSOEMSupport@trimble.com.
Documentation, firmware, and software updates are available at:
www.intech.trimble.com/support/oem_gnss/receivers/trimble.
BX982 GNSS Receiver Enclosure User Guide
11
CHAPTER
2
Specifications
n
Performance specifications
n
Physical specifications
This chapter details the specifications for the
receiver.
n
Electrical specifications
Specifications are subject to change without notice.
n
Environmental specifications
n
Communication specifications
n
Receiver drawings
n
BX982 receiver pinout information
BX982 GNSS Receiver Enclosure User Guide
12
2 Specifications
Performance specifications
Feature
Measurements
Specification
l
Position antenna based on a 220-channel Maxwell 6 chip:
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GPS: Simultaneous L1 C/A, L2E, L2C, L5
GLONASS: Simultaneous L1 C/A, L1 P, L2 C/A (GLONASS M only),
L2 P
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SBAS: Simultaneous L1 C/A, L5
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GALILEO: Simultaneous L1 BOC, E5A, E5B, E5AltBOC
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BeiDou: Simultaneous B1, B2
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QZSS: Simultaneous L1 C/A, L1 SAIF, L2C, L5
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L-Band OmniSTAR VBS, HP, and XP
Vector antenna based on a second 220-channel Maxwell 6 chip:
l
GPS: Simultaneous L1 C/A, L2E, L2C
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GLONASS: Simultaneous L1 C/A, L1 P, L2 C/A, L2 P
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BeiDou: Simultaneous B1
Advanced Trimble Maxwell™ 6 Custom Survey GNSS Technology
High precision multiple correlator for GNSS pseudorange
measurements
Unfiltered, unsmoothed pseudorange measurements data for low
noise, low multipath error, low time domain correlation and high
dynamic response
Very low noise GNSS carrier phase measurements with <1 mm
precision in a 1 Hz bandwidth
Signal-to-Noise ratios reported in dB-Hz
Code differential
GPS positioning
accuracy1
3D: Typically, < 1 m
SBAS accuracy2
<5 m 3DRMS
RTK positioning
accuracy
Horizontal: ±(8 mm + 1 ppm) RMS
Vertical: ±(15 mm + 1 ppm) RMS
1Accuracy and reliability may be subject to anomalies such as multipath, obstructions, satellite geometry, and atmospheric conditions. Always follow
recommended practices.
2Depends on WAAS, EGNOS, and MSAS system performance.
BX982 GNSS Receiver Enclosure User Guide
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2 Specifications
Feature
Specification
(<30 km)
Heading: 2 m baseline <0.09°; 10 m baseline <0.05°
Initialization time
Typically, less than 10 seconds
Initialization
reliability1
Typically >99.9%
1May be affected by atmospheric conditions, signal multipath, and satellite geometry. Initialization reliability is continuously monitored to ensure highest
quality.
BX982 GNSS Receiver Enclosure User Guide
14
2 Specifications
Physical specifications
Feature
Specification
Dimensions (L x W x H)
261 mm x 140 mm x 55 mm
Weight
1.6 kg
Vibration
MIL810F, tailored
Random 6.2 gRMS operating
Random 8 gRMS survival
Mechanical shock
MIL810D
±40 g operating
±75 g survival
I/O connector
D-sub DE9 and DB26
Antenna connector
TNC
Electrical specifications
Feature
Specification
Voltage
9 V to 28 V DC external power input with over-voltage protection
Power consumption
Maximum 4.1 W (with both antennas connected)
BX982 GNSS Receiver Enclosure User Guide
15
2 Specifications
Environmental specifications
Feature
Specification
Temperature
Operating: -40°C to 70°C (-40°F to 158°F)
Storage: -55°C to 85°C (-67°F to 185°F)
Vibration
MIL810F, tailored
Random 6.2 gRMS operating
Random 8 gRMS survival
Mechanical shock
MIL810D
+/- 40 g operating
+/- 75 g survival
Operating humidity
5% to 95% R.H. non-condensing, at +60°C (140°F)
BX982 GNSS Receiver Enclosure User Guide
16
2 Specifications
Communication specifications
Feature
Specification
Communications
1 LAN port
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3 x RS-232
ports
Supports links to 10BaseT/100BaseT
networks.
All functions are performed through a single
IP address simultaneously – including web
interface access and data streaming.
Baud rates up to 460,800
1 USB 2.0 port
Receiver position update rate
1 Hz, 2 Hz, 5 Hz, 10 Hz, 20 Hz and 50 Hz positioning
Correction data input
CMR, CMR+™, sCMRx, RTCM 2.0–2.4, RTCM 3.X, 3.1
Correction data output
CMR, CMR+, sCMRx, RTCM 2.0 DGPS (select RTCM 2.1), RTCM
2.1–2.4, RTCM 3.X, 3.2
Data outputs
1PPS, NMEA, Binary GSOF, ASCII Time Tags
BX982 GNSS Receiver Enclosure User Guide
17
2 Specifications
Receiver drawings
The following drawings show the dimensions of the BX982 receiver. Refer to these drawings if you
need to build mounting brackets and housings for the receiver.
Plan view
Edge view
BX982 GNSS Receiver Enclosure User Guide
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2 Specifications
BX982 receiver pinout information
Port 4 pinout
Pin
Usage
1
Not connected
2
RS-232 RX data in (BD982 Port 4)
3
RS-232 TX data out (BD982 Port 4)
4
Not connected
5
GND
6
Not connected
7
Not connected
8
Not connected
9
Not connected
CAN pinout
Pin
Usage
1
Not connected
2
CAN-
3
Not connected
4
Not connected
5
GND
BX982 GNSS Receiver Enclosure User Guide
19
2 Specifications
Pin
Usage
6
Not connected
7
CAN+
8
Not connected
9
Not connected
Data/power pinout
Pin
Usage
1
Not connected
2
Not connected
3
Not connected
4
Not connected
5
Not connected
6
GND
7
RS-232 Port 2 transmit data (TX)
8
RS-232 Port 2 receive data (RX)
9
USB +
10
Ethernet ground (ET_GND RJ45 Pin 4)
11
Not connected
12
RS-232 Port 1 transmit data (TX)
13
Ethernet ground (GND RH45 Pin 5)
14
Ethernet ground (GND RH45 Pin 8)
15
USB ID
16
Ethernet receive data- (RD-RJ45 Pin 6)
17
Ethernet transmit data- (TD-RJ45 Pin 2)
18
USB-
BX982 GNSS Receiver Enclosure User Guide
20
2 Specifications
Pin
Usage
19
USB Power
20
1PPS
21
RS-232 Port 1 receive data (RX)
22
Ethernet ground (GNSD RJ45 Pin 7)
23
GND
24
DC power in, 9 – 28 V DC
25
Ethernet receive data+ (RD+ RJ45 Pin 3)
26
Ethernet transmit data+ (TD+ RJ45 Pin 1)
BX982 GNSS Receiver Enclosure User Guide
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CHAPTER
3
Troubleshooting Receiver Issues
This section describes some possible receiver issues, possible causes, and how to solve them. Please read
this section before you contact Technical Support.
Issue
Possible cause
Solution
The receiver does External power is too low.
not turn on.
Check that the input voltage is within limits.
The base station
receiver is not
broadcasting.
Port settings between
reference receiver and
radio are incorrect.
Check the settings on the radio and the receiver.
Faulty cable between
receiver and radio.
Try a different cable.
Examine the ports for missing pins.
Use a multimeter to check pinouts.
No power to radio.
If the radio has its own power supply, check the
charge and connections.
Examine the ports for missing pins.
Use a multimeter to check pinouts.
Rover receiver is
not receiving
radio.
The receiver is
The base station receiver
is not broadcasting.
See the issue "The base station receiver is not
broadcasting" above.
Incorrect over air baud
rates between reference
and rover.
Connect to the rover receiver radio, and make
sure that it has the same setting as the reference
receiver.
Incorrect port settings
between roving external
radio and receiver.
If the radio is receiving data and the receiver is
not getting radio communications, check that the
port settings are correct.
The GPS antenna cable is
Make sure that the GPS antenna cable is tightly
BX982 GNSS Receiver Enclosure User Guide
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3 Troubleshooting Receiver Issues
Issue
Possible cause
Solution
not receiving
satellite signals.
loose.
seated in the GPS antenna connection on the
GPS antenna.
The cable is damaged.
Check the cable for any signs of damage. A
damaged cable can inhibit signal detection from
the antenna at the receiver.
The GPS antenna is not in
clear line of sight to the
sky.
Make sure that the GPS antenna is located with a
clear view of the sky.
Restart the receiver as a last resort (turn off and
then turn it on again).
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Glossary
1PPS
Pulse-per-second. Used in hardware timing. A pulse is generated in
conjunction with a time stamp. This defines the instant when the time
stamp is applicable.
almanac
A file that contains orbit information on all the satellites, clock
corrections, and atmospheric delay parameters. The almanac is
transmitted by a GNSS satellite to a GNSS receiver, where it facilitates
rapid acquisition of GNSS signals when you start collecting data, or
when you have lost track of satellites and are trying to regain GNSS
signals.
The orbit information is a subset of the ephemeris/ephemerides data.
base station
Also called reference station. In construction, a base station is a
receiver placed at a known point on a jobsite that tracks the same
satellites as an RTK rover, and provides a real-time differential
correction message stream through radio to the rover, to obtain
centimeter level positions on a continuous real-time basis. A base
station can also be a part of a virtual reference station network, or a
location at which GNSS observations are collected over a period of
time, for subsequent postprocessing to obtain the most accurate
position for the location.
BeiDou
The BeiDou Navigation Satellite System (also known as BDS ) is a
Chinese satellite navigation system.
The first BeiDou system (known as BeiDou-1), consists of four satellites
and has limited coverage and applications. It has been offering
navigation services mainly for customers in China and from
neighboring regions since 2000.
The second generation of the system (known as BeiDou-2) consists of
satellites in a combination of geostationary, inclined geosynchronous,
and medium earth orbit configurations. It became operational with
coverage of China in December 2011. However, the complete Interface
Control Document (which specifies the satellite messages) was not
released until December 2012. BeiDou-2 is a regional navigation service
which offers services to customers in the Asia-Pacific region.
A third generation of the BeiDou system is planned, which will expand
coverage globally. This generation is currently scheduled to be
completed by 2020.
BINEX
BInary EXchange format. BINEX is an operational binary format
standard for GPS/GLONASS/SBAS research purposes. It is designed to
grow and allow encapsulation of all (or most) of the information
currently allowed for in a range of other formats.
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Glossary
broadcast server
An Internet server that manages authentication and password control
for a network of VRS servers, and relays VRS corrections from the VRS
server that you select.
carrier
A radio wave having at least one characteristic (such as frequency,
amplitude, or phase) that can be varied from a known reference value
by modulation.
carrier frequency
The frequency of the unmodulated fundamental output of a radio
transmitter. The GPS L1 carrier frequency is 1575.42 MHz.
carrier phase
Is the cumulative phase count of the GPS or GLONASS carrier signal at a
given time.
cellular modems
A wireless adapter that connects a laptop computer to a cellular phone
system for data transfer. Cellular modems, which contain their own
antennas, plug into a PC Card slot or into the USB port of the
computer and are available for a variety of wireless data services such
as GPRS.
CMR/CMR+
Compact Measurement Record. A real-time message format
developed by Trimble for broadcasting corrections to other Trimble
receivers. CMR is a more efficient alternative to RTCM.
CMRx
A real-time message format developed by Trimble for transmitting
more satellite corrections resulting from more satellite signals, more
constellations, and more satellites. Its compactness means more
repeaters can be used on a site.
covariance
A statistical measure of the variance of two random variables that are
observed or measured in the same mean time period. This measure is
equal to the product of the deviations of corresponding values of the
two variables from their respective means.
datum
Also called geodetic datum. A mathematical model designed to best fit
the geoid, defined by the relationship between an ellipsoid and, a
point on the topographic surface, established as the origin of the
datum. World geodetic datums are typically defined by the size and
shape of an ellipsoid and the relationship between the center of the
ellipsoid and the center of the earth.
Because the earth is not a perfect ellipsoid, any single datum will
provide a better model in some locations than in others. Therefore,
various datums have been established to suit particular regions.
For example, maps in Europe are often based on the European datum
of 1950 (ED-50). Maps in the United States are often based on the
North American datum of 1927 (NAD-27) or 1983 (NAD-83).
All GPS coordinates are based on the WGS-84 datum surface.
deep discharge
Withdrawal of all electrical energy to the end-point voltage before the
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Glossary
cell or battery is recharged.
DGPS
See real-time differential GPS.
differential correction
Differential correction is the process of correcting GNSS data collected
on a rover with data collected simultaneously at a base station.
Because the base station is on a known location, any errors in data
collected at the base station can be measured, and the necessary
corrections applied to the rover data.
Differential correction can be done in real-time, or after the data is
collected by postprocessing.
differential GPS
See real-time differential GPS.
DOP
Dilution of Precision. A measure of the quality of GNSS positions, based
on the geometry of the satellites used to compute the positions. When
satellites are widely spaced relative to each other, the DOP value is
lower, and position precision is greater. When satellites are close
together in the sky, the DOP is higher and GNSS positions may contain
a greater level of error.
PDOP (Position DOP) indicates the three-dimensional geometry of the
satellites. Other DOP values include HDOP(Horizontal DOP) and VDOP
(Vertical DOP), which indicate the precision of horizontal
measurements (latitude and longitude) and vertical measurements
respectively. PDOP is related to HDOP and VDOP as follows: PDOP² =
HDOP² + VDOP².
dual-frequency GPS
A type of receiver that uses both L1 and L2 signals from GPS satellites.
A dual-frequency receiver can compute more precise position fixes
over longer distances and under more adverse conditions because it
compensates for ionospheric delays.
EGNOS
European Geostationary Navigation Overlay Service. A Satellite-Based
Augmentation System (SBAS) that provides a free-to-air differential
correction service for GNSS. EGNOS is the European equivalent of
WAAS, which is available in the United States.
elevation
The vertical distance from a geoid such as EGM96 to the antenna
phase center. The geoid is sometimes referred to as Mean Sea Level.
elevation mask
The angle below which the receiver will not track satellites. Normally
set to 10 degrees to avoid interference problems caused by buildings
and trees, atmospheric issues, and multipath errors.
ellipsoid
An ellipsoid is the three-dimensional shape that is used as the basis for
mathematically modeling the earth’s surface. The ellipsoid is defined
by the lengths of the minor and major axes. The earth’s minor axis is
the polar axis and the major axis is the equatorial axis.
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Glossary
EHT
Height above ellipsoid.
ephemeris/ephemerides A list of predicted (accurate) positions or locations of satellites as a
function of time. A set of numerical parameters that can be used to
determine a satellite’s position. Available as broadcast ephemeris or as
postprocessed precise ephemeris.
epoch
The measurement interval of a GNSS receiver. The epoch varies
according to the measurement type: for real-time measurement it is
set at one second; for postprocessed measurement it can be set to a
rate of between one second and one minute. For example, if data is
measured every 15 seconds, loading data using 30-second epochs
means loading every alternate measurement.
feature
A feature is a physical object or event that has a location in the real
world, which you want to collect position and/or descriptive
information (attributes) about. Features can be classified as surface or
non-surface features, and again as points, lines/break lines, or
boundaries/areas.
firmware
The program inside the receiver that controls receiver operations and
hardware.
GAGAN
GPS Aided Geo Augmented Navigation. A regional SBAS system
currently in development by the Indian government.
Galileo
Galileo is a GNSS system built by the European Union and the
European Space Agency. It is complimentary to GPS and GLONASS.
geoid
The geoid is the equipotential surface that would coincide with the
mean ocean surface of the Earth. For a small site this can be
approximated as an inclined plane above the Ellipsoid.
GHT
Height above geoid.
GIOVE
Galileo In-Orbit Validation Element. The name of each satellite for the
European Space Agency to test the Galileo positioning system.
GLONASS
Global Orbiting Navigation Satellite System. GLONASS is a Soviet spacebased navigation system comparable to the American GPS system. The
operational system consists of 21 operational and 3 non-operational
satellites in 3 orbit planes.
GNSS
Global Navigation Satellite System.
GPS
Global Positioning System. GPS is a space-based satellite navigation
system consisting of multiple satellites in six orbit planes.
GSOF
General Serial Output Format. A Trimble proprietary message format.
HDOP
Horizontal Dilution of Precision. HDOP is a DOP value that indicates the
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Glossary
precision of horizontal measurements. Other DOP values include
VDOP (vertical DOP) and PDOP (Position DOP).
Using a maximum HDOP is ideal for situations where vertical precision
is not particularly important, and your position yield would be
decreased by the vertical component of the PDOP (for example, if you
are collecting data under canopy).
height
The vertical distance above the Ellipsoid. The classic Ellipsoid used in
GPS is WGS-84.
IBSS
Internet Base Station Service. This Trimble service makes the setup of
an Internet-capable receiver as simple as possible. The base station can
be connected to the Internet (cable or wirelessly). To access the
distribution server, the user enters a password into the receiver. To
use the server, the user must have a Trimble Connected Community
site license.
L1
The primary L-band carrier used by GPS and GLONASS satellites to
transmit satellite data.
L2
The secondary L-band carrier used by GPS and GLONASS satellites to
transmit satellite data.
L2C
A modernized code that allows significantly better ability to track the
L2 frequency.
L5
The third L-band carrier used by GPS satellites to transmit satellite
data. L5 will provide a higher power level than the other carriers. As a
result, acquiring and tracking weak signals will be easier.
Location RTK
Some applications such as vehicular-mounted site supervisor systems
do not require Precision RTK accuracy. Location RTK is a mode in
which, once initialized, the receiver will operate either in 10 cm
horizontal and 10 cm vertical accuracy, or in 10 cm horizontal and 2 cm
vertical accuracy.
Mountpoint
Every single NTripSource needs a unique mountpoint on an
NTripCaster. Before transmitting GNSS data to the NTripCaster, the
NTripServer sends an assignment of the mountpoint.
Moving Base
Moving Base is an RTK positioning technique in which both reference
and rover receivers are mobile. Corrections are sent from a “base”
receiver to a “rover” receiver and the resultant baseline (vector) has
centimeter-level accuracy.
MSAS
MTSAT Satellite-Based Augmentation System. A Satellite-Based
Augmentation System (SBAS) that provides a free-to-air differential
correction service for GNSS. MSAS is the Japanese equivalent of WAAS,
which is available in the United States.
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Glossary
multipath
Interference, similar to ghosts on an analog television screen that
occurs when GNSS signals arrive at an antenna having traversed
different paths. The signal traversing the longer path yields a larger
pseudorange estimate and increases the error. Multiple paths can
arise from reflections off the ground or off structures near the
antenna.
NMEA
National Marine Electronics Association. NMEA 0183 defines the
standard for interfacing marine electronic navigational devices. This
standard defines a number of 'strings' referred to as NMEA strings that
contain navigational details such as positions. Most Trimble GNSS
receivers can output positions as NMEA strings.
NTrip Protocol
Networked Transport of RTCM via Internet Protocol (NTrip) is an
application-level protocol that supports streaming Global Navigation
Satellite System (GNSS) data over the Internet. NTrip is a generic,
stateless protocol based on the Hypertext Transfer Protocol (HTTP).
The HTTP objects are extended to GNSS data streams.
NTripCaster
The NTripCaster is basically an HTTP server supporting a subset of
HTTP request/response messages and adjusted to low-bandwidth
streaming data. The NTripCaster accepts request messages on a single
port from either the NTripServer or the NTripClient. Depending on
these messages, the NTripCaster decides whether there is streaming
data to receive or to send.
Trimble NTripCaster integrates the NTripServer and the NTripCaster.
This port is used only to accept requests from NTripClients.
NTripClient
An NTripClient will be accepted by and receive data from an
NTripCaster, if the NTripClient sends the correct request message
(TCP/UDP connection to the specified NTripCaster IP and listening
port).
NTripServer
The NTripServer is used to transfer GNSS data of an NTripSource to the
NTripCaster. An NTripServer in its simplest setup is a computer
program running on a PC that sends correction data of an NTripSource
(for example, as received through the serial communication port from
a GNSS receiver) to the NTripCaster.
The NTripServer - NTripCaster communication extends HTTP by
additional message formats and status codes.
NTripSource
The NTripSources provide continuous GNSS data (for example, RTCM104 corrections) as streaming data. A single source represents GNSS
data referring to a specific location. Source description parameters are
compiled in the source-table.
OmniSTAR
The OmniSTAR HP/XP service allows the use of new generation dualfrequency receivers with the OmniSTAR service. The HP/XP service
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Glossary
does not rely on local reference stations for its signal, but utilizes a
global satellite monitoring network. Additionally, while most current
dual-frequency GNSS systems are accurate to within a meter or so,
OmniSTAR with XP is accurate in 3D to better than 30 cm.
Orthometric elevation
The Orthometric Elevation is the height above the geoid (often termed
the height above the 'Mean Sea Level').
PDOP
Position Dilution of Precision. PDOP is a DOP value that indicates the
precision of three-dimensional measurements. Other DOP values
include VDOP (vertical DOP) and HDOP (Horizontal Dilution of
Precision).
Using a maximum PDOP value is ideal for situations where both vertical
and horizontal precision are important.
postprocessing
Postprocessing is the processing of satellite data after it is collected, in
order to eliminate error. This involves using computer software to
compare data from the rover with data collected at the base station.
QZSS
Quasi-Zenith Satellite System. A Japanese regional GNSS, eventually
consisting of three geosynchronous satellites over Japan.
real-time differential
GPS
Also known as real-time differential correction or DGPS. Real-time
differential GPS is the process of correcting GPS data as you collect it.
Corrections are calculated at a base station and then sent to the
receiver through a radio link. As the rover receives the position it
applies the corrections to give you a very accurate position in the field.
Most real-time differential correction methods apply corrections to
code phase positions.
While DGPS is a generic term, its common interpretation is that it
entails the use of single-frequency code phase data sent from a GNSS
base station to a rover GNSS receiver to provide submeter position
accuracy. The rover receiver can be at a long range (greater than 100
kms (62 miles)) from the base station.
rover
A rover is any mobile GNSS receiver that is used to collect or update
data in the field, typically at an unknown location.
Roving mode
Roving mode applies to the use of a rover receiver to collect data,
stakeout, or control machinery in real time using RTK techniques.
RTCM
Radio Technical Commission for Maritime Services. A commission
established to define a differential data link for the real-time differential
correction of roving GNSS receivers. There are three versions of RTCM
correction messages. All Trimble GNSS receivers use Version 2 protocol
for single-frequency DGPS type corrections. Carrier phase corrections
are available on Version 2, or on the newer Version 3 RTCM protocol,
which is available on certain Trimble dual-frequency receivers. The
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Glossary
Version 3 RTCM protocol is more compact but is not as widely
supported as Version 2.
RTK
Real-time kinematic. A real-time differential GPS method that uses
carrier phase measurements for greater accuracy.
SBAS
Satellite-Based Augmentation System. SBAS is based on differential
GPS, but applies to wide area (WAAS/EGNOS/MSAS) networks of
reference stations. Corrections and additional information are
broadcast using geostationary satellites.
sCMRx
Scrambled CMRx. CMRx is a new Trimble message format that offers
much higher data compression than Trimble's CMR/CMR+ formats.
signal-to-noise ratio
SNR. The signal strength of a satellite is a measure of the information
content of the signal, relative to the signal’s noise. The typical SNR of a
satellite at 30° elevation is between 47 and 50 dB-Hz.
skyplot
The satellite skyplot confirms reception of a differentially corrected
GNSS signal and displays the number of satellites tracked by the GNSS
receiver, as well as their relative positions.
SNR
See signal-to-noise ratio.
Source-table
The NTripCaster maintains a source-table containing information on
available NTripSources, networks of NTripSources, and NTripCasters,
to be sent to an NTripClient on request. Source-table records are
dedicated to one of the following:
l
data STReams (record type STR)
l
CASters (record type CAS)
l
NETworks of data streams (record type NET)
All NTripClients must be able to decode record type STR. Decoding
types CAS and NET is an optional feature. All data fields in the sourcetable records are separated using the semicolon character.
triple frequency GPS
A type of receiver that uses three carrier phase measurements (L1, L2,
and L5).
UTC
Universal Time Coordinated. A time standard based on local solar
mean time at the Greenwich meridian.
xFill
Trimble xFill™ is a new service that extends RTK positioning for several
minutes when the RTK correction stream is temporarily unavailable.
The Trimble xFill service improves field productivity by reducing
downtime waiting to re-establish RTK corrections in black spots. It can
even expand productivity by allowing short excursions into valleys and
other locations where continuous correction messages were not
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Glossary
previously possible. Proprietary Trimble xFill corrections are broadcast
by satellite and are generally available on construction sites globally
where the GNSS constellations are also visible. It applies to any
positioning task being performed with a single-base, Trimble Internet
Base Station Service (IBSS), or VRS™ RTK correction source.
variance
A statistical measure used to describe the spread of a variable in the
mean time period. This measure is equal to the square of the deviation
of a corresponding measured variable from its mean. See also
covariance.
VDOP
Vertical Dilution of Precision. VDOP is a DOP value (dimensionless
number) that indicates the quality of GNSS observations in the vertical
frame.
VRS
Virtual Reference Station. A VRS system consists of GNSS hardware,
software, and communication links. It uses data from a network of
base stations to provide corrections to each rover that are more
accurate than corrections from a single base station.
To start using VRS corrections, the rover sends its position to the VRS
server. The VRS server uses the base station data to model systematic
errors (such as ionospheric noise) at the rover position. It then sends
RTCM correction messages back to the rover.
WAAS
Wide Area Augmentation System. WAAS was established by the
Federal Aviation Administration (FAA) for flight and approach
navigation for civil aviation. WAAS improves the accuracy and
availability of the basic GNSS signals over its coverage area, which
includes the continental United States and outlying parts of Canada
and Mexico.
The WAAS system provides correction data for visible satellites.
Corrections are computed from ground station observations and then
uploaded to two geostationary satellites. This data is then broadcast
on the L1 frequency, and is tracked using a channel on the GNSS
receiver, exactly like a GNSS satellite.
Use WAAS when other correction sources are unavailable, to obtain
greater accuracy than autonomous positions. For more information
on WAAS, refer to the FAA website at http://gps.faa.gov.
The EGNOS service is the European equivalent and MSAS is the
Japanese equivalent of WAAS.
WGS-84
World Geodetic System 1984. Since January 1987, WGS-84 has
superseded WGS-72 as the datum used by GPS.
The WGS-84 datum is based on the ellipsoid of the same name.
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