Globalsat ET-314 Скачать руководство пользователя страница 13

             

       

ET-314

                   

 

 
The Specifications are subject to be changed without notice.                  Copyright 

©

 2007, GlobalSat Technology. 

Page 13 of 19 

Version 1.2

                 $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 

                                          Table B-8 GSV Data Format 

                                           

Name Example Description

Message ID 

$GPGSV 

 

GSV protocol header

Number of Messages

1

 2 

 

Range 1 to 3

Message Number

1

 1 

 

Range 1 to 3

Satellites in View 

07

 

Satellite ID 

07

 

Channel 1(Range 1 to 32)

Elevation 79

degrees

Channel 1(Maximum90)

Azimuth 048

degrees

Channel 1(True, Range 0 to 359)

SNR(C/No) 42

dBHz 

Range 0 to 99,null when not tracking

…….  

 

…….

Satellite ID 

27

 

Channel 4 (Range 1 to 32)

Elevation 27

Degrees

Channel 4(Maximum90)

Azimuth 138

Degrees

Channel 4(True, Range 0 to 359)

SNR(C/No) 42

dBHz 

Range 0 to 99,null when not tracking

Checksum *71

 

<CR><LF>    

End 

of 

message termination

Depending on the number of satellites tracked multiple messages of GSV data may be required. 

 

 

                 

RMC-Recommended Minimum Specific GNSS Data 

                 

Table B-10 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-10 RMC Data Format 

Name Example Units

Description

Message ID 

$GPRMC 

 

RMC protocol header

UTC  Time 

161229.487 

 

hhmmss.sss

Status 

 

A=data valid or V=data not valid 

Latitude  

3723.2475 

 

ddmm.mmmm

N/S Indicator   

 

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.

 

Содержание ET-314

Страница 1: ...Version 1 2 06 22 2007 Globalsat Technology Corporation Headquarters Far East Century Park 16F No 186 Jian Yi Road Chung Ho City Taipei Hsien 235 Taiwan Tel 886 2 8226 3799 Fax 886 2 8226 3899 E mail...

Страница 2: ...ositioning Fleet management Marine navigation Product Features SiRF star III high performance GPS Chipset Very high sensitivity Tracking Sensitivity 159 dBm Extremely fast TTFF Time To First Fix at lo...

Страница 3: ...locity 0 1 m s Time 1us synchronized to GPS time Maximum Altitude 18 000 meter Maximum Velocity 515 meter second Maximum Acceleration 4G Update Rate 1 Hz DGPS WAAS EGNOS MSAS Datum WGS 84 Interface I...

Страница 4: ...ET 314 The Specifications are subject to be changed without notice Copyright 2007 GlobalSat Technology Page 4 of 19 Version 1 2 2 Technical Information Block Diagram Module Pin Assignment...

Страница 5: ...I GPS Signal input 18 GND_A G Analog Ground 19 V_ANT_IN I Active Antenna Bias voltage 20 VCC_RF O Supply Antenna Bias voltage 21 V_BAT I Backup voltage supply 22 Reset I Reset Active low 23 GPIO10 I O...

Страница 6: ...nsmitting channel and is used to output navigation and measurement data to SiRFdemo or user written software TXB For user s application not currently used RF_ON This pin indicates state of RF voltage...

Страница 7: ...ed by a hot or warm start a battery backup must be connected The battery voltage should be between 2 0v and 5 0v Without an external backup battery or super cap the TMP will execute a cold start after...

Страница 8: ...0k 1 2 R3 10k 1 2 1 Ground Planes ET 314 GPS receiver needs two different ground planes The GND_A pin 11 12 13 14 15 16 18 shall be connect to analog ground The GND pin 2 10 30 connect to digital grou...

Страница 9: ...5 Active antenna bias voltage The Vcc_RF pin pin 20 is providing voltage 3 3V If you use active antenna you can connect this pin to V_ANT_IN pin pin 19 to provide bias voltage of active GPS Active Ant...

Страница 10: ...ET 314 The Specifications are subject to be changed without notice Copyright 2007 GlobalSat Technology Page 10 of 19 Version 1 2 Recommend Layout PAD...

Страница 11: ...dicator 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 Altitude1 9 0 meters Units M meters Geoid Separation1 m...

Страница 12: ...e GPGSA A 3 07 02 26 27 09 04 15 1 8 1 0 1 5 33 Table B 5 GSA Data Format Name Example Units Description Message ID GPGSA GSA protocol header Mode1 A See Table B 6 Mode2 3 See Table B 7 Satellite Used...

Страница 13: ...NR C No 42 dBHz Range 0 to 99 null when not tracking Checksum 71 CR LF End of message termination Depending on the number of satellites tracked multiple messages of GSV data may be required RMC Recomm...

Страница 14: ...ommand 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 bit...

Страница 15: ...st CR LF Hex 0D 0A B Navigation lnitialization ID 101 Parameters required for start This command is used to initialize the module for a warm start by providing current position in X Y Z coordinates cl...

Страница 16: ...using known position and time PSRF101 2686700 4304200 3851624 96000 497260 921 12 3 7F C Set DGPS Port ID 102 Set PORT B parameters for DGPS input This command is used to control Serial Port B that is...

Страница 17: ...ff 0 max 255 cksumEnable 0 disable Checksum 1 Enable checksum for specified message Example 1 Query the GGA message with checksum enabled PSRF103 00 01 00 01 25 Example 2 Enable VTG message for a 1Hz...

Страница 18: ...annels 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 PSRF104...

Страница 19: ...earth fixed ECEF 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 comm...

Отзывы: