Owner's manual

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nua
7430‐0131‐01Rev.F
Page103
NAV440UserMa l
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AppendixA. NMEAMessageFormat
TheGPSreceiveroutputsdata(froma440unit)inNMEA‐0183formatat9600Baud,8bits,noparitybit,and1stop
bit.Pack ssection:
etformatsaredescribedinthi
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GGA—GPSFixData,page103
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OutputPacketFormat—InternalGPS,page104
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NOTE:NMEAprotocolisnotrecommendedforairborneapplications;NMEAprotocoldoesnotprovidevertical
velocity,theverticalvelocitythatthe440Seriesestimates(baseduponGPSaltitudechanges)maynotbe
sufficientforairborneapplications.
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GGA—GPSFixData
Timeandposition,togetherwithGPSfixingrelateddata(numberofsatellitesinuse,andtheresultingHDOP,ageof
differentialdataifinuse,etc.).
$GPGGA,hhmmss.ss,Latitude,N,Longitude,E,FS,NoSV,HDOP,msl,m,Altref,m,DiffAge,DiffStation*cs<
CR><LF>
Table97NMEAMessageFormat
ASCIIStringName
Format Example
Description
$GPGGA string $GPGGA MessageID:
GGAprotocolheader
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hhmmss.ss hhmmss.s ss 092725.00 UTCTime:Currenttime
Latitude dddmm.mmmm 4717.11399 Latitude:Degrees+minutes
N character N N/SIndicator:
=south
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N=northorS
Longitude dddmm.mmmm 00833.91590 Longitude:
es
Degrees+minut 
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E charac ert E E/Windicator:
E=eastorW=west
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FS 1digit 1 PositionFixIndicator
8
(RefertoTable9
below)
NoSV numeric 8 SatellitesUsed:
Range0to12
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HDOP numeric 1.01 HDOP:HorizontalDilution ofPrecision
msl numeric 499.6 MSLAltitude(m)
m character M Units:Meters(fixedfield)