Computer Science – Performance
Scientific paper
Aug 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982asdy.conf..325h&link_type=abstract
In: Astrodynamics 1981; Proceedings of the Conference, North Lake Tahoe, NV, August 3-5, 1981. Part 1. (A82-35262 17-13) San Die
Computer Science
Performance
Geometric Dilution Of Precision, Global Positioning System, Navstar Satellites, Satellite Navigation Systems, Computerized Simulation, Phase Shift, Radio Transmission, Range Errors
Scientific paper
Via computer simulations, the relationship between inter-orbit satellite phasing and predicted GPS mission performance is studied for two constellations under consideration. Two measures of mission performance are used. The first is the average number of satellites visible over the earth for a 24 hour period, and the second is the geometric dilution of precision (GDOP) which reflects loss of range measurement precision due to pseudoranging errors. The two constellations, which were analyzed, have 18 satellites in 55 degree inclined orbits. One constellation has six planes with three satellites equally spaced in each plane. The other constellation has three planes with six satellites per plane.
Harnly D.
Stone W.
Wagie D.
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