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18

GPS — User’s Manual

GSA – DOP and Active Satellites

4.5

GSA – DOP and Active Satellites

GPS receiver operating mode, satellites used in the navigation solution reported by the GGA sentence and DOP val-

ues.

Syntax:

$GPGSA,a,b,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,pp.pp,hh.hh,vv.vv*cs<CR><LF>

Example:

$GPGSA,A,3,06,10,15,16,21,25,30,,,,,,2.1,1.2,1.8*38

Position Parameter

Format

Designation / Units

1

a

Mode 

M = Manual, forced to operate in 2D or 3D mode

A = Automatic, allowed to automatically switch 2D/3D

2

b

Fix Status: 

1 = Fix not available

2 = valid, 2D

3 = valid, 3D

3-14

xx

ID (PRN) numbers of GPS satellites used in solution

15

pp.pp

PDOP

16

hh.hh

HDOP

17

vv.vv

VDOP

Содержание GPS

Страница 1: ...GNSS Receiver Module User s Manual Document No MUT100072E1R3 02 2019 GPS...

Страница 2: ...ED OR TRANSMITTED IN ANY FORM ELECTRONIC OR MECHANICAL INCLUDING PHOTOCOPYING RECORDING STORING IN AN INFORMATION RETRIEVAL SYSTEM OR TRANSLATING IN WHOLE OR IN PART WITHOUT PRIOR WRITTEN APPROVAL OF...

Страница 3: ...12 3 5 Compilation and verification 12 3 6 Configuration loading 12 3 7 System monitoring 12 3 8 Quicklook 12 4 NMEA MESSAGE FORMAT 15 4 1 Introduction 15 4 2 Message format 15 4 3 GGA Global Position...

Страница 4: ...ii GPS User s Manual TABLE OF CONTENT 7 3 Service 27 8 GLOSSARY 29...

Страница 5: ...s system synchronization capabilities 1 3 Reference Documents 1 4 Safety Observing the safety instructions will help prevent personal injury or damage to the device Therefore carefully read through an...

Страница 6: ...2 GPS User s Manual Installation transportation storage T H I S P A G E I S I N T E N T I O N A L L Y B L A N K...

Страница 7: ...EWS 2 OVERVIEWS 2 1 Physical overview 1 I O Connector 2 RF Connector 3 Holes x4 for stack mounting 4 Identification label 5 Internal connector P2P 2 2 Functional overview For complete description of t...

Страница 8: ...4 GPS User s Manual Functional overview T H I S P A G E I S I N T E N T I O N A L L Y B L A N K...

Страница 9: ...f the DAU must be defined in the System Inventory activity Refer to RD3 3 2 System Inventory Select System Inventory activity In the Devices tab select the GPS module in the DAU e g XMA 1 The GPS modu...

Страница 10: ...be compatible with your own communication system RS232 configuration Data rate bps Drop list of available data rates Word size bits 7 8 Stop bit 0 1 1 5 2 Parity None Even Odd Signal Output Clock out...

Страница 11: ...refreshed frequently to guar anty the quality of PVT data Old parameters create many perturbations and the PDOP value increased When the threshold value is reached the GPS send a reboot command to the...

Страница 12: ...gital bus 3 3 2 Digital message Select a digital bus e g GPS_bus previously created The line must be underlined Click on Add Message button A new window appears Four modes are available TRANSPARENT NM...

Страница 13: ...extract the following information Parameter name Bits field Parameter description Latitude 31 course N 1 S 0 30 22 degree 0 90 21 16 minute 0 59 15 0 decimal 0 9999 Longitude 31 course E 1 W 0 30 22 d...

Страница 14: ...106 Chapter 4 Length for information Date Time predefined parameter XMA 48 bits GPS 64 bits IRIG 106 Chapter 4 64 bits Other predefined parameters 32 bits VDOP 15 8 integer part 0 99 7 0 decimal part...

Страница 15: ...CD format IEEE 754 Floating point format Refer to the IEEE website for more details http standards ieee org Position Select the position of the field to extract in the NMEA frame Position 1 means the...

Страница 16: ...configuration into the flash memory of the device 3 7 System monitoring In operational mode the System Monitoring activity show you the real time GPS status and acquired parameters Select System Moni...

Страница 17: ...Quicklook MUT100072E1R3 02 2019 13 OPERATION Click on Stop Acquisition button to stop recording Refer to QUICKLOOK chapter of RD3 for more details...

Страница 18: ...14 GPS User s Manual Quicklook T H I S P A G E I S I N T E N T I O N A L L Y B L A N K...

Страница 19: ...Message format All NMEA message and command data consist of ASCII characters from 20 127 decimal or from HEX 14 to HEX 7E For further information see section 6 1 Table3 in NMEA 3 0 specification NMEA...

Страница 20: ...mm minutes ss seconds sss decimal part of seconds 2 xxmm ddddd Latitude coordinate xx degrees mm minutes ddddd decimal part of minutes 3 N S Character denoting either N North or S South 4 yyymm ddddd...

Страница 21: ...A 61 Position Parameter Format Designation Units 1 xxmm ddddd Latitude coordinate xx degrees mm minutes ddddd decimal part of minutes 2 N S Character denoting either N North or S South 3 yyymm ddddd...

Страница 22: ...x xx xx xx xx xx xx xx xx xx xx xx pp pp hh hh vv vv cs CR LF Example GPGSA A 3 06 10 15 16 21 25 30 2 1 1 2 1 8 38 Position Parameter Format Designation Units 1 a Mode M Manual forced to operate in 2...

Страница 23: ...nt of satellites may occasionally be more than the number of receiver tracking channels 12 Syntax GPGSV n m ss xx ee aaa cn xx ee aaa cn hh CR LF Example GPGSV 4 1 14 03 66 207 50 08 09 322 44 11 01 2...

Страница 24: ...t of seconds 2 S Fix Status indicator A valid V invalid 3 xxmm ddddd Latitude coordinate xx degrees mm minutes ddddd decimal part of minutes 4 N S Character denoting either N North or S South 5 yyymm...

Страница 25: ...2 6 T 208 7 M 0 38 N 0 7 K A 0D Position Parameter Format Designation Units 1 h h Heading in degrees 2 T Letter T denoting True heading in degrees 3 m m Magnetic heading in degrees 4 M Letter M denoti...

Страница 26: ...e time output on other messages is the moment of the navigation fix As the ZDA time is set to output time of the message this time is closer to the real time and may be used as a somewhat accurate tim...

Страница 27: ...connect CED pin 6 Connect to GND pin 5 for cable detection VALID_FIX corresponding to the GPS lock status Module connector Corresponding mating connector SOURIAU 8MC A N T C13 S OL3 13 pin female con...

Страница 28: ...24 GPS User s Manual RF connector T H I S P A G E I S I N T E N T I O N A L L Y B L A N K...

Страница 29: ...ain antenna GPS antenna placed near jamming source Add a GPS band filter and or if possible modify your system setup Too old GPS parameter in memory Restart your DAU to refresh the GPS param eters Ada...

Страница 30: ...26 GPS User s Manual T H I S P A G E I S I N T E N T I O N A L L Y B L A N K...

Страница 31: ...service representative for assistance in repair and dis assembly 7 2 Maintenance No preventive maintenance is required on the GPS module to ensure optimum overall performance The GPS module has to be...

Страница 32: ...28 GPS User s Manual Service T H I S P A G E I S I N T E N T I O N A L L Y B L A N K...

Страница 33: ...Firmware Data Base FDC Frequency to Digital Converter GND Ground GNSS Global Navigation Satellite System HW Hardware IRIG 106 Comprehensive telemetry standard to ensure interoperability in aeronautica...

Страница 34: ...RF Radio Frequency RMS Root Mean Square RS 232 Recommended Standard 232 Serial Communications RX Receive S N Serial Number sps Sample per second SW Software TBD To Be Defined TX Transmit V Volt W Watt...

Страница 35: ...MUT100072E1R3 02 2019 31 Notes...

Страница 36: ...5 Avenue des Andes CS 90101 91978 COURTABOEUF CEDEX FRANCE Tel 33 1 6982 7800 Web http www zodiacaerospace com Contact isite zodiacaerospace com...

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