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1. SR 89 User s Manual V1 1 11 AGAMA SR 89 Manual V1 0 GPGSV This message transfers information about satellites in view The GPGSV message structure is shown below Each record contains the information for up to 4 channels allowing up to 12 satellites in view In the final record of the sequence the unused channel fields are left blank with commas to indicate that a field has been omitted Following is an example GPGSV 2 1 07 07 79 048 42 02 51 062 43 26 36 256 42 27 27 138 42 71 GPGSV 2 2 07 09 23 313 42 04 19 159 41 15 12 041 42 41 The GPGSV message structure is shown below Field Example Unit Notes Message ID GPGSV GSA protocol header Number of messages 2 Number of messages maximum 3 Message number 1 Sequence number range to 3 Satellites in view 07 Number of satellites currently in view Satellite ID 07 Channel 1 ID range 1 to 32 Elevation 79 degree Elevation of satellite maximum 90 Azimuth 048 degree Azimuth of satellite range 0 to 359 SNR C No 42 dBHz Range 0 to 99 null when not tracking Satellite ID 02 Channel 2 ID range 1 to 32 Elevation 51 degree Elevation of satellite maximum 90 Azimuth 062 degree Azimuth of satellite range 0 to 359 SNR C N 43 dBHz Range 0 to 99 null when not tracking Satellite ID 26 Channel 3 ID range 1 to 32 Elevation 36 degree Elevation of satellite maximum 90 Azimuth 256 de2. 3V DC power input 3 Applications The SR 89 engine module is a high performance ultra low power consumption GPS receiver Applications are as follow Car Navigation Wrist Watch Solar Operated Device Marine Navigation Fleet Management AVL and Location Based Services Radar detector with GPS function Hand Held Device for Personal Positioning and Navigation Ideal for PDA Pocket PC and Other Computing Devices at GPS Application SR 89 User s Manual V1 1 pacA ma SR 89 Manual V1 0 4 Operation and Test optional The customers can change the data protocol and communication data baud rate for their applications using a GPS Viewer software Installing appropriate viewer program to host device you may check the status of the GPS receiver whenever you like to Following are standard buttons and operation steps a Execute the Viewer program Press the COM button to set Com Port for this data link and Baud Rate to 4800 b Click OPEN to download the received data Usually one window shows the NMEA format data stream and another window shows tracked satellite constellation and signal quality status c Once the link is successful click CLOSE button to exit the program However you may click the Cold button to perform cold start testing SR 89 User s Manual V1 1 Daca mA SR 89 Manual V1 0 Appendix Software Specifications NMEA Protocol The SR 89 softw
3. first fix and 1Hz navigation update The unit is very suitable for space sensitive applications Main Features High sensitivity SiRF Star II chipset High performance receiver tracks up to 20 satellites TTL output for GPS command interface Low power consumption Average Cold Start time under 42 seconds On chip 1Mb SRAM Reacquisition time 0 1 second Support accurate 1PPS output signal aligned with GPS timing Support Standard NMEA 0183 and SiRF Binary protocol WAAS EGNOS support Compact size 28 2mm 20mm 2 9mm Easy integration into hand held devices The SR 89 design utilizes the latest surface mount technology and high level circuit integration to achieve superior performance while minimizing dimension and power consumption This hardware capability combined with software intelligence makes the board easy to be integrated and used in all kinds of navigation applications or products The module communicates with application system via TTL level with NMEA 0183 protocol SR 89 User s Manual V1 1 pacA ma 2 Technical Specifications 2 1 Electrical Characteristics 2 1 1 General Frequency C A code Channels 2 1 2 Sensitivity Tracking 2 1 3 Accuracy Open Sky Position Time 2 1 4 Datum Default SR 89 Manual V1 0 L1 1575 42 MHz 1 023 MHz chip rate 20 channels all in view tracking 159 dBm typical lt 10 meters 2D RMS lt 7 meters 2D RMS WAAS corrected 1 5 meters DGPS corrected 1 micros
4. in knots Units N N knots Speed 0 2 km hr Speed Units K K km hour Mode A A Autonomous D DGPS E DR Checksum 23 lt CR gt lt LF gt Message terminator 1 SiRF does not support magnetic declination All course over ground data are geodetic WGS84 directions 2 Fields marked in italic red apply only to NMEA version 2 3 and later in this NMEA message description SR 89 User s Manual V1 1 DAGA MA GPZDA This message transfers UTC Time and Date GPZDA 181813 14 10 2003 00 00 4F The GPZDA message format is shown below SR 89 Manual V1 0 Following is an example Field Example Unit Notes Message ID GPZDA ZDA protocol header UTC Time 181813 Either using valid IONO UTC or estimated from default leap seconds UTC Day 14 01 to 31 day of month UTC Month 10 01 to 12 UTC Year 2003 1980 to 2079 Local zone hours 00 Offset from UTC set to 00 Local zone minutes 00 Offset from UTC set to 00 Checksum 4F lt CR gt lt LF gt Message terminator All Rights Reserved SR 89 User s Manual V1 1
5. 9 62 120598 10 The GPRMC message format is shown below Field Example Unit Notes Message ID GPRMC RMC protocol header UTC Time 161229 487 hhmmss sss Status A A Data valid or V Data invalid Latitude 3723 2475 ddmm mmmm N S Indicator N N north or S south Longitude 12158 3416 ddmm mmmm E W indicator W E east or W west Speed over ground 0 13 knot Speed over ground Course over ground 309 62 degree Course over ground Date 120598 ddmmyy current date Magnetic variation degree Not used Mode A A Autonomous D DGPS E DR Checksum 10 lt CR gt lt LF gt Message terminator 1 SiRF does not support magnetic declination All course over ground data are geodetic WGS84 directions 2 Fields marked in italic red apply only to NMEA version 2 3 and later in this NMEA message description SR 89 User s Manual V1 1 Following is an example pacA ma SR 89 Manual V1 0 GPVTG This message transfers velocity course over ground and ground speed Following is an example GPVTG 309 62 T M 0 13 N 0 2 K A 23 The GPVTG message format is shown below Field Example Unit Notes Message ID GPVTG VTG protocol header Course true 309 62 degree Measured heading Reference T T true heading Course magnetic degree Measured heading Reference M M magnetic heading Speed 0 13 knot Speed
6. GPGLL This message transfers geographic position latitude longitude and time Following is an example GPGLL 3723 2475 N 12158 3416 W 161229 487 A A 41 The GPGLL message structure is shown below Field Example Unit Notes Message ID GPGLL GLL protocol header 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 UTC Time 161229 487 hhmmss sss Status A A Data valid or V Data invalid Made a A Autonomous D DGPS E DR Only present in NMEA version 3 00 Checksum A lt CR gt lt LF gt Message terminator SR 89 User s Manual V1 1 pacA ma SR 89 Manual V1 0 GPGSA This message transfers DOP and active satellites information Following is an example GPGSA A 3 07 02 26 27 09 04 15 1 8 1 0 1 5 33 The GPGSA message structure is shown below Field Example Unit Notes Message ID GPGSA GSA protocol header M Manual forced to operate in selected 2D Mode A or 3D mode A Automatic switching between modes 1 Fix not available Mode 3 2 2D position fix 3 3D position fix Satellites Used 07 SV on channel 1 Satellites Used 02 SV on channel 2 Satellites Used SV on channel 12 PDOP 1 8 HDOP 1 0 VDOP 1 5 Checksum 33 lt CR gt lt LF gt Message terminator 1 Satellites used in solution
7. are is capable of supporting the following NMEA message formats specifically developed and defined by SiRF NMEA Message Prefix Format Direction GPGGA Time position and fix type data Out GPGLL Latitude longitude time of position fix and status Out GPGSA GNSS DOP and active satellites Out GPGSV Satellites in view Out Radio beacon signal to noise ratio signal strength GPMSS Out frequency etc GPRMC Recommended minimum specific GNSS data Out GPVTG Speed and course over ground Out GPZDA Date and time Out General NMEA Format The general NMEA format consists of an ASCII string commencing with a character and terminating with a lt CR gt lt LF gt sequence NMEA standard messages commence with GP then a 3 letter message identifier The message header is followed by a comma delimited list of fields optionally terminated with a checksum consisting of an asterix and a 2 digit hex value representing the checksum There is no comma preceding the checksum field When present the checksum is calculated as a bitwise exclusive of the characters between the and As an ASCII representation the number of digits in each number will vary depending on the number and precision hence the record length will vary Certain fields may be omitted if they are not used in which case the field position is reserved using commas to ensure correct interpretation of subsequen
8. econd synchronized to GPS time WGS 84 2 1 5 Acquisition Rate Open Sky Hot start Warm start Cold start Reacquisition 2 1 6 Dynamic Conditions Altitude Velocity Acceleration Jerk 2 1 7 Power Main power input Supply Current 1 sec average 38 sec average 42 sec average 0 1 sec average lt 18 000 meters 60 000 feet lt 515 meters sec 1000 knots lt 4G 20 meters sec max 3 3 VDC 5 lt 80 mA SR 89 User s Manual V1 1 pacA ma SR 89 Manual V1 0 2 1 8 Serial Port Electrical interface TTL level Protocol support NMEA 0183 SiRF Binary Default NMEA GGA GSA GSV RMC GLL VTG and ZDA optional 4800 baud rate other rate optional 8 bits data 1 stop bit no parity 2 1 9 Time 1 PPS Pulse pulse duration Ips Time reference at the pulse positive edge Synchronized to GPS time 1 us 2 2 Environmental Characteristics Operating temperature range 40 C to 85 C Storage temperature range 45 C to 100 C 2 3 Physical Characteristics Mechanical Outline SR 89 User s Manual V1 1 pacA ma SR 89 Manual V1 0 Pin assignment Pin Pin Name Function description Pin Pin Name Function description 1 GND Ground 8 BATTERY Backup battery input 2 5 3 3V 2 RFIN GPS RF signal input 9 LED_ON_OFF_ 1 Hz High Low pulse output 3 GND Ground 10 TX Serial Data Output 4 GND Ground 11 RX Serial Data input 5 GND Ground 12 GND Ground 6 GND Ground 13 GND Ground 7 VCC_IN _
9. gree Azimuth of satellite range 0 to 359 SNR C No 42 dBHz Range 0 to 99 null when not tracking Satellite ID 27 Channel 4 ID range 1 to 32 Elevation 27 degree Elevation of satellite maximum 90 Azimuth 138 degree Azimuth of satellite range 0 to 359 SNR C No 42 dBHz Range 0 to 99 null when not tracking Checksum 71 lt CR gt lt LF gt Message terminator 1 Depending on the number of satellites tracked multiple messages of GSV data may be required SR 89 User s Manual V1 1 12 pacA ma GPMSS SR 89 Manual V1 0 This message transfers information about radio beacon signal to noise ratio signal strength frequency etc Following is an example GPMSS 55 27 318 0 100 1 57 The GPMSS message format is shown below Field Example Unit Notes Message ID GPMSS MSS protocol header Signal Strength 55 dB SS of tracked frequency Signal to Noise Ratio 27 dB SNR of tracked frequency Beacon Frequency 318 0 kHz Currently tracked frequency Beacon Bit Rate 100 Bits per second Channel Namba j jie hone Dace acolo aad Checksum 57 lt CR gt lt LF gt Message terminator 1 Fields marked in italic red apply only to NMEA version 2 3 and later in this NMEA message description SR 89 User s Manual V1 1 pacA ma GPRMC This message transfers recommended minimum specific GNSS data SR 89 Manual V1 0 GPRMC 161229 487 A 3723 2475 N 12158 3416 W 0 13 30
10. pacA ma SR 89 Manual V1 0 GPS Engine Board Manual SA E9 SiRF Star Il V 1 1 e 7 DAGA M gt Made in Taiwan 2008 08 08 service dagamagps com www dagamagps com Free service hot line for mainland 400 820 1322 gt E Contents 1 Introduction sesseeseseeseeseesescesescsossceseesesosscesessesoescecseseseseeseeseo 3 TM OyeryieWw cancssescdaridenosetientsewcuedecedectaeninssecabsasaesnucaaiaawicieaseehoeeans 3 2 Technical Specifications oeeseeseoessessessseoesseseoseseeseoessceeoeese 4 2 1 Electrical Characteristics sie iccevsundasessescdsevsidaiesssacesaveawdassascensasecses 2 2 Environmental Characterisucs ccsscsccssistnsvewendsscnnsianson sdvateguwessenetsens 5 2 3 Physical ar aCierisenes oiciccccncsnessedeesswal acai ersiuncsnduedeesuuetesviceeaede 5 3 Applications sesssesessesessessescesescesescescsoesoesossesoeseeoesesoesesseee 4 Operation and Test optional s ssssssssseesseessoocceeseessese 7 Appendix Software Specifications oesseseseeseesesoessescsescesesscssese 8 SR 89 Manual V1 0 Specifications subject to gt without prior notice SR 89 User s Manual V1 1 pacA ma SR 89 Manual V1 0 1 Introduction 1 1 Overview Product Introduction The SR 89 GPS modules incorporates high sensitivity high performance SiRF Star chipset solution in a compact design The module tracks up to 20 satellites at a time while offering fast time to
11. t fields SR 89 User s Manual V1 1 pacA ma SR 89 Manual V1 0 GPGGA This message transfers global positioning system fix data Following is an example GPGGA 161229 487 3723 2475 N 12158 3416 W 1 07 1 0 9 0 M 0000 18 The GPGGA message structure is shown below Field Example Unit Notes 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 0 Fix not available or invalid 1 GPS SPS mode fix valid Position Fix Indictor 1 2 Differ GPS SPS mode fix valid 3 5 Not supported 6 Dead Reckoning Mode fix valid Number of satellites used to calculate fix Satellites Used 07 Range 0 to 12 HDOP 1 0 Horizontal Dilution of Precision MSL Altitude 9 0 Meter Altitude above mean seal level Units M Meter M stands for meters Geoid Separation Meter Separation from Geoids can be blank Units Meter M stands for meters Age of Diff Corr Second aa ees oe Null fields when Diff Ref Station ID 0000 Checksum 18 lt CR gt lt LF gt Message terminator 1 Only apply to NMEA version 2 3 and later in this NMEA message description 2 SiRF does not support geoid corrections Values are WGS84 ellipsoid heights SR 89 User s Manual V1 1 DAGA mA SR 89 Manual V1 0
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