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EM-318-02

                                                                                               

 

Specifications are subject to be changed without notice. 

Page 11 of 16 

 

Version 1.2.1 

 

RMC-Recommended Minimum Specific GNSS Data 

Table B-9 contains the values for the following example: 
$GPRMC,161229.487,A,3723.2475,N,12158.3416,W,0.13,309.62,120598,,*10 
 

Table B-9 RMC Data Format 

 Name 

Example 

  Units 

  Description 

 Message ID 

  $GPRMC   

  RMC protocol header 

 UTC  Time 

  161229.487  

  hhmmss.sss 

 Status 

  A 

 

  A=data valid or V=data not valid

 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 

 Speed Over Ground 

  0.13 

  knots 

 

 Course Over Ground 

  309.62 

  degrees     True 

 Date  

  120598 

 

  ddmmyy 

 Magnetic Variation

2

 

 

  degrees 

  E=east or W=west 

 Checksum 

  *10 

 

 

  <CR><LF> 

 

 

    End of message termination 

SiRF Technology Inc. does not support magnetic declination. All “course over ground” data are   
Geodetic WGS48 directions. 
 
 

VTG-Course Over Ground and Ground Speed

   

$GPVTG,309.62,T,,M,0.13,N,0.2,K*6E 
 

 

 

 

 

Table B-9 VTG Data Format 

 Name 

Example 

Units 

  Description 

 Message ID 

  $GPVTG   

  VTG protocol header 

 Course 

  309.62 

  degrees 

  Measured heading 

 Reference 

  T 

 

  True 

 Course 

 

  degrees 

  Measured heading 

 Reference  

  M 

 

  Magnetic 

 Speed 

  0.13 

  knots 

  Measured horizontal speed 

 Units 

  N 

 

  Knots 

 Speed 

  0.2 

  Km/hr 

  Measured horizontal speed 

 Units 

  K 

 

  Kilometers per hour 

 Checksum 

  *6E 

 

 

  <CR><LF> 

 

 

    End of message termination 

 

 

Summary of Contents for EM-318-02

Page 1: ...o Patch Antenna Globalsat Technology Corporation 16F No 186 Jian Yi Road Chung Ho City Taipei Hsien 235 Taiwan Tel 886 2 8226 3799 Fax 886 2 8226 3899 service globalsat com tw www globalsat com tw US...

Page 2: ...ble electronic devices such as automotive navigation devices handheld navigation devices mobile phones and other GPS applications Product Features 9 SiRF GSC3f LP chipset 9 20 parallel channels 9 Extr...

Page 3: ...te Rate 1 Hz SBAS WAAS EGNOS MSAS Interface I O Connector Type 10 pin Molex Micro Miniature 1 25mm External Antenna Port MMCX Physical Characteristic Dimensions 1 2 x 1 2 x 0 2 30 x 30 x 4 8 mm DC Cha...

Page 4: ...EM 318 02 Specifications are subject to be changed without notice Page 4 of 16 Version 1 2 1 2 Technical Information Block Diagram...

Page 5: ...tage supply This is the battery backup input that powers the SRAM and RTC when main power is removed Typical current draw is 15uA Without an external backup battery the module engine board will execut...

Page 6: ...e changed without notice Page 6 of 16 Version 1 2 1 Molex Micro Miniature 1 25mm Connectors 10 Pin Connector Digi Key Part No WM1728 ND Molex Part No 51021 1000 28 32 AWG Crimp Digi Key Part No WM1775...

Page 7: ...EM 318 02 Specifications are subject to be changed without notice Page 7 of 16 Version 1 2 1 Dimensions...

Page 8: ...north or S south Longitude 12158 3416 dddmm mmmm E W Indicator W E east or W west Position Fix Indicator 1 See Table B 3 Satellites Used 07 Range 0 to 12 HDOP 1 0 Horizontal Dilution of Precision MSL...

Page 9: ...29 487 hhmmss sss Status A A data valid or V data not valid Checksum 2C CR LF End of message termination GSA GNSS DOP and Active Satellites Table B 5 contains the values for the following example GPGS...

Page 10: ...041 42 41 Table B 8 GSV Data Format Name Example Units Description Message ID GPGSV GSV protocol header Number of Messages1 2 Range 1 to 3 Message Number1 1 Range 1 to 3 Satellites in View 07 Satellit...

Page 11: ...W west Speed Over Ground 0 13 knots Course Over Ground 309 62 degrees True Date 120598 ddmmyy Magnetic Variation2 degrees E east or W west Checksum 10 CR LF End of message termination SiRF Technology...

Page 12: ...ut Command A Set Serial Port ID 100 Set PORTA parameters and protocol This command message is used to set the protocol SiRF Binary NMEA or USER1 and or the communication parameters baud data bits stop...

Page 13: ...satellite data will enable the receiver to acquire signals more quickly and thus generate a rapid navigational solution When a valid Navigation Initialization command is receive the receiver will res...

Page 14: ...CKSUM CR LF baud 1200 2400 4800 9600 19200 38400 DataBits 8 StopBits 0 1 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 stand...

Page 15: ...oat possibly signed Lon Longitude position it is assumed positive east of Greenwich and negative west of Greenwich Float possibly signed Alt Altitude position float possibly signed ClkOffset Clock Off...

Page 16: ...EF coordinate system Results may be converted to an earth model geoid defined by the selected datum The default datum is WGS 84 World Geodetic System 1984 which provides a worldwide common grid system...

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