Precise orbit determination and gravity field improvement for the ERS satellites

Details Precise orbit determination and gravity field improvement for the ERS satellites Precise orbit determination and gravity field improvement for the ERS satellites

Apr 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998jgr...103.8113s&link_type=abstract

Journal of Geophysical Research, Volume 103, Issue C4, p. 8113-8128

Other

98

Geodesy And Gravity: Satellite Orbits

Scientific paper

The radial orbit error has long been the major error source in ERS-1 altimetry, crippled by having only satellite laser ranging for precise tracking and relying on insufficiently accurate general-purpose gravity field models. Altimeter crossovers are used very effectively as additional tracking data to laser ranging. The ERS Tandem Mission even provides the unique possibility to simultaneously determine orbits of two similar satellites flying the same orbit. Altimeter crossovers between the two satellites then link the two orbits into a common reference frame. Tailoring of the Joint Gravity Model 3 (JGM 3) is another step to reduce orbit errors. This technique is aimed at the reduction of the geographically anticorrelated orbit error (observed in the crossover height differences) through the adjustment of selected gravity field parameters. The resulting Delft Gravity Model (DGM)-E04 has reduced this part of the orbit error by a factor of 2, performs even better with respect to the ESA-provided orbits, and also outperforms the recent Earth Geopotential Model EGM96 in this respect. ERS-1 and ERS-2 orbits for the entire Tandem Mission are computed and studied in detail, and orbit errors due to the gravity field and nonconservative forces are identified. Analyses systematically show that the orbits computed with JGM 3 have a radial root-mean-square orbit accuracy of 7 cm, with DGM-E04 5 cm.

Affiliated with

Also associated with

No associations

Rating

Precise orbit determination and gravity field improvement for the ERS satellites does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Precise orbit determination and gravity field improvement for the ERS satellites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Precise orbit determination and gravity field improvement for the ERS satellites will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1605160