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C-GPS Overview and Usage

WM_DEV_C-GPS_APN_001-001

late: WM ACM F 007 level002 A P P L I C A T I O N N O T E A P P L I C A T I O N N O T E A P P L I C A T I O N N O T E

• A Number of messages required to hold data on all SVs

in view

• B Message number

• C Total number of satellites in view

• D1-D4 Satellite PRN number

• E1-E4 Elevation in degrees (90 maximum)

• Az1-Az4 Azimuth (measured in degrees from True north,

000 to 359

• SNR1-SNR4 Signal-to-noise ratio (the higher the number

the better the signal)

• *hh Checksum

6.2.3 ZDA (Date and Time)

$GPZDA,hhmmss.ss,dd,mm,yyyy,xx,yy,*hh

• hhmmss.ss UTC of position fix (time)

• dd Day

• mm Month

• yyyy Year

• xx Local zone hours (-13 to 13)

• yy Local zone minutes (00 to 59)

• *hh Checksum

6.2.4 GGA (Global Positioning System Fix Data)

$GPGGA,hhmmss.ss,llll.ll,E,yyyyy.yy,F,A,bb,x.x,y.y,M,z.

z,M,s.s,####,*hh

• hhmmss.ss UTC of position fix (time)

• llll.ll Destination waypoint latitude

• E N or S (for latitude)

• yyyyy.yy Destination waypoint longitude

• F E or W (for longitude)

• A Fix quality:

0 = Invalid

1 = GPS fix (SPS)

2 = DGPS fix

3 = PPS fix

4 = Real Time Kinematic

5 = Float RTK

6 = Estimated (dead reckoning)

7 = Manual input mode

8 = Simulation mode

• bb Number of satellites in use

• x.x Horizontal error (precision)

• y.y,M Antenna height in meters

• z.z,M Height of geoid (mean sea level) in meters

• s.s Time in seconds since last update

• #### DGPS station ID

• *hh Checksum

6.2.5 VTG (Course over Ground and Ground Speed)

$GPVTG,COG,T,COG,M,SOG,N,SOG,K,A*hh

• COG,T Course over Ground (T = true)

• COG,M Course over Ground (M = magnetic)

• SOG,N Speed over Ground (N= knots)

• SOG,K Speed over Ground (K = km/h)

• M Mode indicator

A= Autonomous

D= Differential

E= Estimated (Dead Reckoning)

N= None

• *hh Checksum

6.2.6 GSA (GNSS DOP – Dilution of Precision and active

satellites)

$GPGSA,OM,NM,D1-D12,PDOP, HDOP, VDOP*hh

• OM Operation Mode

• M : Manual forced to operate in 2D or 3D

• A : Automatic 2D/3D

•

NM Navigation Mode

1 : Fix not available

2 : 2D

3 : 3D

• D1-D12 Satellite Vehicles Used in Position Fix

• PDOP Position Dilution of Precision (PDOP)

• HDOP Horizontal Dilution of Precision (HDOP)

• VDOP Vertical Dilution of Precision (VDOP)

• *hh Checksum

6.2.7 RMC (Recommended Minimum Specific Data)

$GPRMC,hhmmss.ss,A,llll.ll,E,yyyyy.yy,F,SOG,

COG,ddmmyy,MV,F,M*hh

• hhmmss.ss UTC of position fix (time)

• A Data Status (A = OK, V = Void)

• llll.ll Destination waypoint latitude

• E N or S (for latitude)

• yyyyy.yy Destination waypoint longitude

• F E or W (for longitude)

• SOG Speed Over Ground (knots)

• COG Course Over Ground (°)

• Ddmmyy Date Stamp coordinated

• MV Magnetic Variation (°)

• F East or West Magnetic Variation Direction

• M Mode indicator

A= Autonomous

D= Differential

E= Dead Reckoning,

N= None

• *hh Checksum

7 PACKAGE DELIVERABLES

This application note is delivered as a single compressed zip

archive as follows:

Filename Description

WM_DEV_C-GPS_APN_001-001.zip Application Note

7.1 DOCUMENTATION

- This application note

- eRide APIs Technical Manual

- C-GPS Development kit User Guide

- Samples description document

8 RELATED DOCUMENTS

Filename Description

[1] eTM-GCLAPI-CoreLib_API.pdf eRide APIs Technical

Manual

[2] WM_DEV_C-GPS_UGD_001 C-GPS Development

kit User Guide

[3] MiniRide Datasheet.pdf MiniRide Datasheet

[4] Prelude1 RF Receiver

Datasheet.pdf

Prelude1 Datasheet

[5] Opus1, GPS Receiver

Datasheet.pdf

Opus1 Datasheet

[6] MG-001ApprovalSheet.pdf Specification for

approval

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without prior written agreement.

Ce document est la propriété exclusive de WAVECOM. Il ne peut être communiqué ou divulgué à des tiers sans son autorisation préalable.

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