Altina GPS 9540 Manuel utilisateur
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Version 1.01 2004 / 09 / 16
Copyright is reserved by Altina
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INDEX
1OVERVIEW...........................................................................................................3
2PRODUCT FEATURE.......................................................................................3
3SPECIFICATION.................................................................................................4
4HARDWARE .........................................................................................................6
4.1. DIMENSION ................................................................................................................6
4.2. OUTPUT TERMINAL AND DEFINITION....................................................................7
5. SOFTWARE DATA.............................................................................................8
5.1. NMEA OUTPUT MESSAGE.....................................................................................8
5.2. GLOBAL POSITIONING SYSTEM FIX DATA (GGA)............................................8
5.3. GEOGRAPHIC POSITION WITH LATITUDE/LONGITUDE(GLL)..........................9
5.4. GNSS DOP AND ACTIVE SATELLITES (GSA).................................................10
5.5. GNSS SATELLITES IN VIEW (GSV)...................................................................11
5.6. RECOMMENDED MINIMUM SPECIFIC GNSS DATA (RMC)..........................11
5.7. COURSE OVER GROUND AND GROUND SPEED (VTG)...................................12
5.8. RTCM RECEIVED DATA.......................................................................................13
6. WARRANTY........................................................................................................13
Copyright is reserved by Altina
i
1 OVERVIEW
Congratulation on your purchase of Altina, which manufacture and provide various
GPS applications. Altina’s GGM308 GPS Receiver provides you various applications
such as car navigation, marine navigation, mapping, surveying, security, agriculture and so
on. It communicates with device (such as PocketPC or notebook) via compatible
dual-channel through RS-232 or TTL and saves satellite data by built–in backup memory.
Low power consumption technology enables GGM308 and your device to save more
operating power. Furthermore, GGM308 can track up to 12 satellites at a time, re-acquire
satellite signals in 100ms and update position data every second. Trickle-Power allows
the unit to operate a fraction of the time, and Push-to-Fix permits user to have a quicker
position fix even though the receiver stays off.
2 PRODUCT FEATURE
SiRF Star Ⅱe/LP ”High Performance and Low Power Consumption Chipset
Integrated ARM7TDMI CPU
Cold Start : within 45 seconds.
A rechargeable battery sustains internal clock and memory and can be recharged
during normal operation.
All-in-View 12-channel parallel processing.
Support NMEA 0183 V2.2 command
Optional communication levels, RS-232 and TTL
Reacquisition Time: 0.1 seconds
Support Accurate 1PPS Output Signal Aligned with GPS Timing
Water proof design enable receiver to continuously operate for 4 days under
1meter water deep.
Built-in hardware Tracking Loop Processor WAAS/EGNOS Demodulator and
NDGPS/U.S. Coast Guard Beacon support
3
Obvious LED display status: LED provides users visible positioning status. LED
“ON” : power connected; “BLINKING”: positioned.
Differential capability utilizes real-time RTCM corrections to provide 1-5 meter
precise position accuracy.
FLASH base program memory
3 SPECIFICATION
4
Key Feture
Frequency L1, 1575.42 MHz
C/A Code 1.023 MHz chip rate
Channels 12
Sensitivity -173 dBW
Non DGPS (Differential GPS)
Position Horizontal 5 to 25 meter CEP, without SA
Velocity 0.1 meter/second, without SA
Time 1 microsecond synchronized GPS time
DGPS (Differential GPS)
Position Horizontal 1 to 5 meter, typical
Velocity 0.05 meter/second, typical
EGNOS/WAAS < 2.2 m, horizontal 95% of time
Datum WGS-84
Performance
Hot start 8 sec., average
Warm start 38 sec., average
Cold start 45 sec., average
Reacquisition 0.1 sec. average
GPS Protocol Default: NMEA0183 V2.2 (Secondary: SiRF binary)
GPS Output Data SiRF binary >> position, velocity, altitude, status and control ;
NMEA0183 protocol, and supports command:
GGA, GSA, GSV, RMC, VTG, GLL (VTG and GLL are optional)
GPS transfer rate Software command setting (Default : 4800,n,8,1 for NMEA )
Acceleration Limit Less than 4g
Altitude Limit 18,000 meters (60,000 feet) ma
Velocity Limit 515 meters/sec. (1,000 knots) max.
Jerk Limit 20 meters/second, max
Operating -40oC to +85oC(internal temperature).
Storage -45oC to +100oC
Input Voltage +4.75 ~ 5.5 VDC without accessories.
Power consumption <80mA at 4.5- 5.5V input
Dimension 2.32" x 1.85" x 0.82" (59.32mm x 51.28mm x 20.3mm)
Cable Length 60" (1500mm)
5
4 HARDWARE
4.1. Dimension
6
4.2. Output terminal and definition
Output terminal: PS-2 female
Pin Definition:
PS-2 female connector
Signal
Pin RS-232 RS-232+TTL
1 TX TX (RS232)
2 +5VDC +5VDC
3 NC TX (TTL)
4 Ground Ground
5 DGPS IN RX (TTL)
6 RX RX (RS232)
7
5. SOFTWARE DATA
NMEA 0183 V2.2 Protocol
Use RS-232 interface：4800 bps, 8 bit data, 1 stop bit and no parity.
5.1. NMEA Output Message
Table 5-1 NMEA-0183 Output Messages
NMEA Record Description
GPGGA Global positioning system fixed data
GPGLL Geographic position: latitude/longitude
GPGSA GNSS DOP and active satellites
GPGSV GNSS satellites in view
GPRMC Recommended minimum specific GNSS data
GPVTG Course over ground and ground speed
5.2. Global Positioning System Fix Data (GGA)
Table 5-2 contains the values for the following example
$GPGGA,161229.487,3723.2475,N,12158.3416,W,1,07,1.0,9.0,M, , , ,0000*18
Table 5-2 GGAData Format
Name Example Units Description
Message ID $GPGGA GGA protocol header
UTC Time 161229.487 hhmmss.sss
Latitude 3723.2475 ddmm.mmmm
N/S Indicator N N=north or S=south
Longitude 12158.3416 dddmm.mmmm
E/W Indicator W E=east or W=west
Position Fix Indicator 1 See Table 5-3
Satellites Used 07 Range 0 to 12
HDOP 1.0 Horizontal Dilution of Precision
MSLAltitude 9.0 Meters
8
Table 5-2 GGA Data Format-continue
Name Example Units Description
Units M Meters
Geoid Separation Meters
Units M Meters
Age of Diff. Corr. second Null fields when DGPS is not used
Diff. Ref. Station ID 0000
Checksum *18
<CR> <LF> End of message termination
Table 5-3 Position Fix Indicator
Value Description
0 0 Fix not available or invalid
1 GPS SPS Mode, fix valid
2 Differential GPS, SPS Mode, fix valid
3 GPS PPS Mode, fix valid
5.3. Geographic Position with Latitude/Longitude(GLL)
Table 5-3 contains the values for the following example.
$GPGLL,3723.2475,N,12158.3416,W,161229.487,A*2C
Table 5-4 GLLDataFormat
9
Name Example Units Description
Message ID $GPGLL GLL protocol header
Latitude 3723.2475 ddmm.mmmm
N/S Indicator N N/S Indicator N N=north or S=south
Longitude 12158.3416 dddmm.mmmm
E/W Indicator W E=east or W=west
UTC Position 161229.487 hhmmss.sss
Status A A=data valid or V=data not valid
Checksum *2C
<CR> <LF> End of message termination
5.4. GNSS DOP and Active Satellites (GSA)
Table 5-4 contains the values for the following example.
$GPGSA,A,3,07,02,26,27,09,04,15, , , , , ,1.8,1.0,1.5*33
Table 5-5 GSADataFormat
Name Example Units Description
Message ID $GPGSA GSA protocol header
Mode 1 A See Table 5-6
Mode 2 3 See Table 5-7
Satellite Used(1) 07 Sv on Channel 1
Satellite Used(1) 02 Sv on Channel 2
Satellite Used Sv on Channel 12
PDOP 1.8 Position Dilution of Precision
HDOP 1.0 Horizontal Dilution of Precision
VDOP 1.5 Vertical Dilution of Precision
Checksum *33
<CR> <LF> End of message termination
NOTE: Satellite used in solution.
Table 5-6 Mode 1
Value Description
M Manual—forced to operate in 2D or 3D mode
A2DAutomatic—allowed to automatically switch 2D/3D
Table 5-7 Mode 2
Value Description
1 Fix Not Available
2 2D
3 3D
10
Ce manuel convient aux modèles suivants
1
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