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Stars Navigation Technologies Ltd
www.starsnav.com / sales@starsnav.com
MTI-1 GPS receiver User Guide
MTI-1 Features
SiRF starII high performance and low power
consumption chip set
Support standard NMEA 0183 protocol
All-in-view 12-channel parallel processing
SnapLock 100ms re-acquisition time
Cold start under 45 seconds, average
Architecture
Superior urban canyon performance
FoliageLock for weak signal tracking
Optional build-in SuperCap to reserve system data for rapid
satellite acquisition.
Full-duplex RS-232 port for navigation and control messages
nd
Differential GPS capability through 2
RS-232 port
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Table of Contents
Related Manuals for Stars Navigation Technologies MTI-1
Summary of Contents for Stars Navigation Technologies MTI-1
- Page 1 Stars Navigation Technologies Ltd www.starsnav.com / sales@starsnav.com MTI-1 GPS receiver User Guide MTI-1 Features SiRF starII high performance and low power consumption chip set Support standard NMEA 0183 protocol All-in-view 12-channel parallel processing SnapLock 100ms re-acquisition time Cold start under 45 seconds, average...
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Page 2: Electrical Characteristics
Stingray( STR-1 ) Antenna Specifications Electrical Characteristics Receiver Frequency L1, 1575.42MHz C/A code 1.023MHz chip rate Channels Sensitivity -170dBW Accuracy Position Horizontal 15m 2d RMS (SA off) 10m 2d RMS,WAAS enable(SA off) 1 ~ 5 m, DGPS corrected Velocity 0.1m/sec 95% (SA off), Time 1 microsecond synchronized to GPS time Datum... -
Page 3: Pcb Top View
Active Antenna MCX ,SMA ,SMB or others OEM specified connector available,please refer to Connector our gps antenna product Environmental Characteristics Temperature Operating -30 deg. C to +80 deg. C Storage -40 deg. C to +85 deg. C Physical Characteristics Dimension: PCB SIDE VIEW PCB TOP VIEW Interface Connection... -
Page 4: Interface Description
Name Description Type PinNumber VANT Antenna DC Voltage Input 3.8V~6.5V DC Power Input Input VBAT Backup Battery Input (Shorted with pin 2) Input PBRES Push Button Reset Input (Active Low) Input RESERVED (Reserved) SELECT Down-load data from RS232 to flash (Reserved) RESERVED (Reserved) - Page 5 * TXA : This is the main transmits channel for outputting navigation and measurement data to user’s navigation software or user written software. MTI-1(TTL): TTL level , 0V ~ 3.5V MTI-1(RS232): RS232 level * RXA : This is the main receive channel for receiving software commands to the engine board from SiRFdemo software or from user written software.
- Page 6 Table B-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 B-2 GGA Data 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=north or S=south Longitude 12158.3416 dddmm.mmmm E/W Indicator E=east or W=west Position Fix Indicator...
- Page 7 N/S Indicator N=north or S=south Longitude 12158.3416 dddmm.mmmm E/W Indicator E=east or W=west UTC Position 161229.487 hhmmss.sss Status A=data valid or V=data not valid Checksum <CR><LF> End of message termination GSA-GNSS DOP and Active Satellites Table B-5 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 B-5 GSA Data Format Name...
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Page 8: Rmc-Recommended Minimum Specific Gnss Data
Satellite ID Channel 1(Range 1 to 32) Elevation degrees Channel 1(Maximum90) Azimuth degrees Channel 1(True, Range 0 to 359) SNR(C/No) dBHz Range 0 to 99,null when not tracking ……. ……. Satellite ID Channel 4 (Range 1 to 32) Elevation Degrees Channel 4(Maximum90) Azimuth Degrees... -
Page 9: Set Serial Port
Name Example Units Description Message ID $GPVTG VTG protocol header Course 309.62 degrees Measured heading Reference True Course degrees Measured heading Reference Magnetic Speed 0.13 knots Measured horizontal speed Units Knots Speed Km/hr Measured horizontal speed Units Kilometers per hour Checksum <CR><LF>... - Page 10 **Checksum Field: The absolute value calculated by exclusive-OR the 8 data bits of each character in the Sentence,between, but excluding “$” and “*”. The hexadecimal value of the most significant and least significant 4 bits of the result are convertted to two ASCII characters (0-9,A-F) for transmission.
- Page 11 UINT32 <WeekNo> GPS Week Number UINT16 Week No and Time Of Week calculation from UTC time <chnlCount> Number of channels to use.1-12. If your CPU throughput is not high enough, you could decrease needed throughput by reducing the number of active channels UBYTE <ResetCfg>...
- Page 12 <baud> 1200,2400,4800,9600,19200,38400 <DataBits> <StopBits> <Parity> 0=None,Odd=1,Even=2 Example: Set DGPS Port to be 9600,8,N,1 PSRF102,9600,8,1.0*12 D). Query/Rate Control ID:103 Query standard NMEA message and/or set output rate This command is used to control the output of standard NMEA message GGA, GLL, GSA, RMC, VTG.
- Page 13 E). LLA Navigation lnitialization ID:104 Parameters required to start using Lat/Lon/Alt This command is used to initialize the module for a warm start, by providing current position (in Latitude, Longitude, Altitude coordinates), clock offset, and time. This enables the receiver to search for the correct satellite signals at the correct signal parameters. Correct initialization parameters will enable the receiver to acquire signals more quickly, and thus, will produce a faster navigational soution.
- Page 14 for GSP1, 95000 for GSP1/LX will be used. INT32 <TimeOfWeek> GPS Time Of Week UINT32 <WeekNo> GPS Week Number UINT16 <ChannelCount> Number of channels to use. 1-12 UBYTE <ResetCfg> bit mask 0×01=Data Valid warm/hot starts=1 0×02=clear ephemeris warm start=1 0×04=clear memory. Cold start=1 UBYTE Example: Start using known position and time.
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