Geographically anti-correlated orbit error in ERS-1 orbits


The geographically anti-correlated radial orbit error can be isolated by averaging the crossover height differences over a long period (here: ERS-1 Mission Phases C, E, and F) at each crossover location. The obtained mean crossover height difference (shown below) equals twice the geographically anti-correlated radial orbit error. Plots below compare the results obtained with UT/CSR TEG3 and DUT DGM-E04 orbits.
CSR Orbits (Var = 4.38 cm)

DUT Orbits (Var = 2.94 cm)

More analyses on ERS-1 orbit stability

Questions or comments:
Remko Scharroo, remko.scharroo@lr.tudelft.nl.
1 April 1997.