1. Given a Navigation Data for a GPS Satellite in RINEX Format, Perform the Following

Homework No. 2

GS 609 Surveying with Satellites Winter Quarter, 2002 February 1, 2002 Due: February 15, 2002

1. Given a navigation data for a GPS satellite in RINEX format, perform the following:

a. Extract the orbital parameters (refer to the handout distributed in class: Satellite Geodesy by Seeber, pp. 219-224, and the RINEX description available at: http://www.ngs.noaa.gov/CORS/Rinex2.html ).

b. Calculate the Earth-Centered-Earth-Fixed (ECEF) Cartesian coordinates of the satellite.

c. Compute the geodetic latitude, longitude, and height of the GPS satellite relative to the GRS80 ellipsoid, with semi-major axis a=6378137 and inverse flattening f=298.257222101; use an iterative procedure or close-formulas provided in the handout (IERS Technical Note 21, pp12-13, subroutine GEOD).

2. Derive equations (4.6) and (4.7) on p. 42 of your textbook.

Navigation File:

2 01 1 1 0 0 0.0-0.319344457239D-03-0.534328137292D-11 0.000000000000D+00 0.360000000000D+02 0.375937500000D+02 0.541629703908D-08-0.129782648958D+01 0.233203172684D-05 0.204452316975D-01 0.690482556820D-05 0.515367277908D+04 0.864000000000D+05 0.413507223129D-06 0.206122975719D+01 0.387430191040D-06 0.933068641414D+00 0.227593750000D+03-0.207404185475D+01-0.841106464032D-08 0.295369446180D-09 0.100000000000D+01 0.109500000000D+04 0.000000000000D+00 0.400000000000D+01 0.000000000000D+00-0.186264514923D-08 0.292000000000D+03 0.792180000000D+05 0.000000000000D+00 0.000000000000D+00 0.000000000000D+00