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Sierra Wireless 20070914 Cell Phone User Manual

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Rev 3.0B Feb.08 83

10

10: Global Positioning System

(GPS)

• Configuring the

PinPoint X for GPS

• RAP Configuration

• NMEA Configuration

• TAIP Emulation

Configuration

ThePinPointXisequippedwithaGlobalPositioningSystem

receiver(GPS)toascertainitspositionandtrackthe

movementsofavehicleorotherdeviceswhichmove.The

PinPointXrelaystheinformationofitslocationaswellas

otherdataforusewithtrackingapplications.

TrackingApplicationsusedwithSierraWirelessPinPointline

modems:

• Air‐Trak

• TrackYourTruck

• TrackStar

• DeLormeStreetAtlasUSA

• MicrosoftStreetsandTrips

• CompassCom

• ZollData

• andmanymore...

GPS Overview

TheGlobalPositioningSystem(GPS)isasatellitenavigation

systemusedfordeterminingalocationandprovidingahighly

accuratetimereferencealmostanywhereonEarth.TheUS

militaryreferstoGPSasNavigationSignalTimingand

RangingGlobalPositioningSystem(NAVSTARGPS).

GPSconsistsofa“constellation”ofatleast24satellitesin6

orbitalplanes.EachsatellitecirclestheEarthtwiceeveryday

atanaltitudeof20,200kilometers(12,600miles).Eachsatellite

isequippedwithanatomicclockandconstantlybroadcasts

thetime,accordingtoitsownclock,alongwithadministrative



informationincludingtheorbitalelementsofitsmotion,as

determinedbyground‐basedobservatories.

AGPSreceiver,suchasthePinPointX,requiressignalsfrom

fourormoresatellitesinordertodetermineitsownlatitude,

longitude,andelevation.Usingtimesyncedtothesatellite

system,thereceivercomputesthedistancetoeachsatellite

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