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 NMEA0183 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:

Corresponding latitude and longitude conversion factors

Distance between two points

Travel speed and heading
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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