UniTraQ
UniTraQ
OEM Module
GT-310F (Flash version)
Features
z
12 parallel channel GPS receiver
z
4000 simultaneous time-frequency
search bins
z
SBAS (WAAS, EGNOS) support
z
Programmable Flash version
z
-140dBm acquisition sensitivity
z
-150dBm tracking sensitivity
z
< 10 second hot start
z
< 45 second cold start
z
5m CEP accuracy
Fast Acquisition Enhanced Sensitivity
12 Channel GPS Sensor Module
The GT-310F module is a small, single-board, 12
parallel-channel receiver intended for Original Equipment
Manufacturer (OEM) products.
The receiver continuously tracks all satellites in view and
provides accurate satellite positioning data. The GT-310F is
optimized for applications requiring good performance, low
cost, and maximum flexibility; suitable for a wide range of
OEM configurations including handhelds, asset tracking,
marine and vehicle navigation products.
Its 12 parallel channels and 4000 search bins provide fast
satellite signal acquisition and short startup time. Acquisition
sensitivity of –140dBm and tracking sensitivity of –150dBm
offers good navigation performance even in urban canyons
having limited sky view.
Satellite-based augmentation systems, such as WAAS and
EGNOS, are supported to yield improved accuracy.
Users can modify the NMEA sentences and Binary code
UniTraq International Co., LTD.
Flying Without Fearing
www.UniTraq.com.
UniTraQ
OEM Module
Product Specifications
Receiver Type
12 parallel channel
L1 C/A code
Accuracy
Position
Velocity
Timing
5m CEP
0.1m/sec
+/-1us
Startup Time
< 10sec
< 35sec
< 45sec
Hot Start
Warm Start
Cold Start
Signal Reacquisition
1s
Sensitivity
-140dBm acquisition
-150dBm tracking
Dynamics
4G (39.2m/sec2)
Operational Limits
Altitude < 18,000m or
Velocity < 515m/sec
(COCOM limit, either may be exceeded but not both)
Protocol
NMEA-0183, ver. 3.01
9600 baud, 8 N 1
Datum
Default WGS-84
User definable
Serial Interface
LVTTL Level
RF Connector
MMCX
Interface Connector
10pin 2mm male header
Power Supply
3.3V +/- 100mV or
3.8V ~ 8.0V (5V version)
Current Consumption
28-33 mA
Operating Temperature
-40oC ~ 85oC
Dimension
43L x 31W x 6H (mm)
Weight
10g
UniTraq International Co., LTD.
Flying Without Fearing
www.UniTraq.com.
MECHANICAL CHARACTERISTICS
43.3m m
Ø 2.3m m x 3
1.9
mm
2.8mm
2mm
Ø 0.5m m x 10
4.5m m
2.5mm
2.1mm
1.9m m
1.2mm
2mm
4mm
2.2mm
3.5mm
2.2mm
3m m
4.54mm
6.5mm
41.4mm
2.5mm
6.6mm
2m m
Active antenna
RF connector
10 pin connector
Battery
Unitraq International Co., Ltd.
Flying without Fearing
www.uniitraq.com
10 Pins Connector
Pin-10
Pin-1
GT-310F Lateral View
PINOUT DESCRIPTION
Pin Number Signal Name
Description
1
Serial Data Out 1 Asynchronous serial output at LVTTL level, to output NMEA message
2
Serial Data In 1 Asynchronous serial input at LVTTL level, to input commands
Pull high if not used
3
VCC
Regulated 3.3V power input (3.3V version)
3.8V ~ 8.0V (5V version)
4
GND
Ground
5
PIO Output
PIO output, default used for GPS status indication
6
1PPS
1 pulse per second time mark
7
RESET IN
Reset input, active LOW
8
Serial Data In 2 Asynchronous serial input at LVTTL level, to input DGPS RTCM data
Pull high if not used
9
VBAT
Optional 3.3V backup power input to sustain RTC and SRAM data
10
Antenna Power Power input for active antenna
1PPS Output
The GPS receiver is in navigation mode upon power-up, with 1PPS output free running. After 3 minutes of
valid position fix and remaining under static-mode, the receiver changes to timing-mode, with 1PPS output
signal synchronized to the UTC second. The receiver will change to navigation-mode, with 1PPS output free
running, if the receiver is in motion. The 1PPS output will become synchronized to the UTC second again after
the receiver had remained in static mode for 3 minutes.
Unitraq International Co., Ltd.
Flying without Fearing
www.uniitraq.com
NMEA Messages
The serial interface protocol is based on the National Marine Electronics Association’s NMEA 0183 ASCII
interface specification. This standard is fully define in “NMEA 0183, Version 3.01” The standard may be
obtained from NMEA, www.nmea.org
GGA - GPS FIX DATA
Time, position and position-fix related data (number of satellites in use, HDOP, etc.).
Format:
$GPGGA,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,M,<10>,M,<11>,<12>,*<13><CR><LF>
Example:
$GPGGA,104549.04,2447.2038,N,12100.4990,E,1,06,01.7,00078.8,M,0016.3,M,,*5C<CR><LF>
Field
1
2
3
4
5
6
7
8
9
10
11
12
13
Example
Description
104549.04 UTC time in hhmmss.ss format, 000000.00 ~ 235959.99
2447.2038 Latitude in ddmm.mmmm format
Leading zeros transmitted
N
Latitude hemisphere indicator, ‘N’ = North, ‘S’ = South
12100.4990 Longitude in dddmm.mmmm format
Leading zeros transmitted
E
Longitude hemisphere indicator, 'E' = East, 'W' = West
1
Position fix quality indicator
0: position fix unavailable
1: valid position fix, SPS mode
2: valid position fix, differential GPS mode
06
Number of satellites in use, 00 ~ 12
01.7
Horizontal dilution of precision, 00.0 ~ 99.9
00078.8 Antenna height above/below mean sea level, -9999.9 ~ 17999.9
0016.3
Geoidal height, -999.9 ~ 9999.9
Age of DGPS data since last valid RTCM transmission in xxx format (seconds)
NULL when DGPS not used
Differential reference station ID, 0000 ~ 1023
NULL when DGPS not used
5C
Checksum
Note: The checksum field starts with a ‘*’ and consists of 2 characters representing a hex number. The
checksum is the exclusive OR of all characters between ‘$’ and ‘*’.
Unitraq International Co., Ltd.
Flying without Fearing
www.uniitraq.com
GLL - LATITUDE AND LONGITUDE, WITH TIME OF POSITION FIX AND STATUS
Latitude and longitude of current position, time, and status.
Format:
$GPGLL,<1>,<2>,<3>,<4>,<5>,<6>,<7>*<8><CR><LF>
Example:
$GPGLL,2447.2073,N,12100.5022,E,104548.04,A,A*65<CR><LF>
Field
1
2
3
4
5
6
7
8
Example
Description
2447.2073 Latitude in ddmm.mmmm format
Leading zeros transmitted
N
Latitude hemisphere indicator, ‘N’ = North, ‘S’ = South
12100.5022 Longitude in dddmm.mmmm format
Leading zeros transmitted
E
Longitude hemisphere indicator, 'E' = East, 'W' = West
104548.04 UTC time in hhmmss.ss format, 000000.00 ~ 235959.99
A
Status, ‘A’ = valid position, ‘V’ = navigation receiver warning
A
Mode indicator
‘N’ = Data invalid
‘A’ = Autonomous
‘D’ = Differential
‘E’ = Estimated
65
Checksum
Unitraq International Co., Ltd.
Flying without Fearing
www.uniitraq.com
GSA - GPS DOP AND ACTIVE SATELLITES
GPS receiver operating mode, satellites used for navigation, and DOP values.
Format:
$GPGSA,<1>,<2>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<4>,<5>,<6>*<7><CR><LF>
Example:
$GPGSA,A,3,26,21,,,09,17,,,,,,,10.8,02.1,10.6*07<CR><LF>
Field
Example
Description
1
A
Mode, ‘M’ = Manual, ‘A’ = Automatic
2
3
Fix type, 1 = not available, 2 = 2D fix, 3 = 3D fix
3
26,21,,,09,17,,,,,, PRN number, 01 to 32, of satellite used in solution, up to 12 transmitted
4
10.8
Position dilution of precision, 00.0 to 99.9
5
02.1
Horizontal dilution of precision, 00.0 to 99.9
6
10.6
Vertical dilution of precision, 00.0 to 99.9
7
07
Checksum
Unitraq International Co., Ltd.
Flying without Fearing
www.uniitraq.com
GSV - GPS SATELLITE IN VIEW
Number of satellites in view, PRN number, elevation angle, azimuth angle, and C/No. Only up to four satellite
details are transmitted per message. Additional satellite in view information is sent in subsequent GSV
messages.
Format:
$GPGSV,<1>,<2>,<3>,<4>,<5>,<6>,<7>,…,<4>,<5>,<6>,<7> *<8><CR><LF>
Example:
$GPGSV,2,1,08,26,50,016,40,09,50,173,39,21,43,316,38,17,41,144,42*7C<CR><LF>
$GPGSV,2,2,08,29,38,029,37,10,27,082,32,18,22,309,24,24,09,145,*7B<CR><LF>
Field
1
2
3
4
5
6
7
Example
2
1
08
26
50
016
40
8
7C
Description
Total number of GSV messages to be transmitted
Number of current GSV message
Total number of satellites in view, 00 ~ 12
Satellite PRN number, GPS: 01 ~ 32, SBAS: 33 ~ 64 (33 = PRN120)
Satellite elevation number, 00 ~ 90 degrees
Satellite azimuth angle, 000 ~ 359 degrees
C/No, 00 ~ 99 dB
Null when not tracking
Checksum
Unitraq International Co., Ltd.
Flying without Fearing
www.uniitraq.com
RMC - RECOMMANDED MINIMUM SPECIFIC GPS/TRANSIT DATA
Time, date, position, course and speed data.
Format:
$GPRMC,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,<10>,<11>,<12>*<13><CR><LF>
Example:
$GPRMC,104549.04,A,2447.2038,N,12100.4990,E,016.0,221.0,250304,003.3,W,A*22<CR><LF>
1
2
3
Field
Example
104549.04
A
2447.2038
4
5
N
12100.4990
6
7
8
9
10
11
12
E
016.0
221.0
250304
003.3
W
A
13
22
Description
UTC time in hhmmss.ss format, 000000.00 ~ 235959.99
Status, ‘V’ = navigation receiver warning, ‘A’ = valid position
Latitude in dddmm.mmmm format
Leading zeros transmitted
Latitude hemisphere indicator, ‘N’ = North, ‘S’ = South
Longitude in dddmm.mmmm format
Leading zeros transmitted
Longitude hemisphere indicator, 'E' = East, 'W' = West
Speed over ground, 000.0 ~ 999.9 knots
Course over ground, 000.0 ~ 359.9 degrees
UTC date of position fix, ddmmyy format
Magnetic variation, 000.0 ~ 180.0 degrees
Magnetic variation direction, ‘E’ = East, ‘W’ = West
Mode indicator
‘N’ = Data invalid
‘A’ = Autonomous
‘D’ = Differential
‘E’ = Estimated
Checksum
Unitraq International Co., Ltd.
Flying without Fearing
www.uniitraq.com
VTG - COURSE OVER GROUND AND GROUND SPEED
Velocity is given as course over ground (COG) and speed over ground (SOG).
Format:
GPVTG,<1>,T,<2>,M,<3>,N,<4>,K,<5>*<6><CR><LF>
Example:
$GPVTG,221.0,T,224.3,M,016.0,N,0029.6,K,A*1F<CR><LF>
Field
1
2
3
4
5
Example
221.0
224.3
016.0
0029.6
A
6
1F
Description
True course over ground, 000.0 ~ 359.9 degrees
Magnetic course over ground, 000.0 ~ 359.9 degrees
Speed over ground, 000.0 ~ 999.9 knots
Speed over ground, 0000.0 ~ 1800.0 kilometers per hour
Mode indicator
‘N’ = Data invalid
‘A’ = Autonomous
‘D’ = Differential
‘E’ = Estimated
Checksum
Unitraq International Co., Ltd.
Flying without Fearing
www.uniitraq.com
ZDA TIME AND DATE
Format:
$GPZDA,<1>,<2>,<3>,<4>,<5>,<6>*<7><CR><LF>
Example:
$GPZDA,104548.04,25,03,2004,,*6C<CR><LF>
Field
1
2
3
4
5
Example
104548.04
25
03
2004
6
7
6C
Description
UTC time in hhmmss.ss format, 000000.00 ~ 235959.99
UTC time: day (01 ... 31)
UTC time: month (01 ... 12)
UTC time: year (4 digit year)
Local zone hour
Not being output by the receiver (NULL)
Local zone minutes
Not being output by the receiver (NULL)
Checksum
Binary Messages
See Binary Message Protocol User’s Guide for detailed descriptions.
Unitraq International Co., Ltd.
Flying without Fearing
www.uniitraq.com
Unitraq International Co., Ltd.
No. 25, Alley 3, Lane 162, Kesheyuan road,
Hsinchu City, 300, Taiwan
Phone
Fax
Email
Website
+886 3 57886698, +886-3 5786697
+886 3 5772589
info@UniTraq.com.
www.UniTraq.com
© 2006 Unitraq International Co., Ltd. All rights reserved.
Not to be reproduced in whole or part for any purpose without written permission of Unitraq International Inc (“Unitraq”)
Information provided by Unitraq is believed to be accurate and reliable. These materials are provided by Unitraq as a
service to its customers and may be used for informational purposes only. Unitraq assumes no responsibility for errors or
omissions in these materials, nor for its use. Unitraq reserves the right to change specification at any time without notice.
These materials are provides “as is” without warranty of any kind, either expressed or implied, relating to sale and/or use
of Unitraq products including liability or warranties relating to fitness for a particular purpose, consequential or incidental
damages, merchantability, or infringement of any patent, copyright or other intellectual property right. Unitraq further does
not warrant the accuracy or completeness of the information, text, graphics or other items contained within these materials.
Unitraq shall not be liable for any special, indirect, incidental, or consequential damages, including without limitation, lost
revenues or lost profits, which may result from the use of these materials.
UniTraq products are not intended for use in medical, life-support devices, or applications involving potential risk of death,
personal injury, or severe property damage in case of failure of the product.
Unitraq International Co., Ltd.
Flying without Fearing
www.uniitraq.com
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