NMEA Commands 281
NMEA Commands
The antenna altitude is either ellipsoidal (default) or geoidal (mean-sea-level) depending on the
selection made with $PASHS,HGT (see UCT section). The geoidal altitude can be also derived by
subtracting the geoidal separation from the ellipsoidal altitude.
Typical UTM message:
$PASHR,UTM,015454.00,10S,588757.623,4136720.056,1,04,03.8,
00012.123,M,-031.711,M,014,1010*3A
Table 8.54 outlines the response message.
m Geoidal separation units (meters) M
d10 Age of differential corrections 0 to 999
s11 Differential reference station ID 4 character string
*hh Checksum
Table 8.54. Typical UTM Message
Item Description
015454.00 UTC time
10S UTM zone 10; southern hemisphere
588757.623 UTM easting coordinate
4136720.056 UTM northing coordinate
1 Raw position
04 Number of satellites used to compute position
03.8 HDOP
00012.123 altitude
M Altitude units (meters)
-031.711 geoidal separation
M geoidal separation units (meters)
014 age of corrections
1010 Differential Station ID
*3A Checksum
Table 8.53. $PASHR,UTM Message Format (Continued)
Parameters Description Range
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