Global Positioning System Data Processing Exercise

Assume that while traveling between two points of interest (lines 1 and 2) your data logger recorded four pairs of NMEA-0183 GPS receiver output sentences:
Pair 1
$GPGGA,184617.00,4026.753776,N,08700.060992,W,2,06,1.1,202.42,M,-33.80,M,4.8,0555*7E
$GPGGA,184717.00,4026.752578,N,08659.833346,W,2,06,1.1,211.49,M,-33.80,M,4.8,0555*7B
Pair 2
$GPGLL,4027.026627,N,08704.962922,W,180520.00,A,D*79
$GPGLL,4027.026173,N,08704.994100,W,180534.00,A,D*7B
Pair 3
$GPRMC,190117,A,4025.805350,N,08656.885780,W,010.26,135.9,131000,1.9,W,D*2E
$GPRMC,190147,A,4025.741404,N,08656.804063,W,011.59,136.7,131000,1.9,W,D*25
Pair 4
$PTNL,GGK,180839.00,101300,4027.2267096,N,08704.8370594,W,4,07,1.7,EHT177.620,M*66
$PTNL,GGK,180840.00,101300,4027.2266871,N,08704.8348099,W,4,07,1.7,EHT177.584,M*66
For each pair determine: Note: Assume height above allipsoid equal to 170 m for pairs 2 and 3.

Download EXCEL spreadsheet web_GPS.xls to verify your answers.

Last updated: October 31, 2000
Author: Viacheslav Adamchuk
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