Observations of geographically correlated orbit errors for TOPEX/Poseidon using the global positioning system Journal Article uri icon



  • We have compared Global Positioning System (GPS)‐based dynamic and reduced‐dynamic TOPEX/Poseidon orbits over three 10‐day repeat cycles of the ground‐track. The results suggest that the prelaunch joint gravity model (JGM‐1) introduces geographically correlated errors (GCEs) which have a strong meridional dependence. The global distribution and magnitude of these GCEs are consistent with a prelaunch covariance analysis, with estimated and predicted global rms error statistics of 2.3 and 2.4 cm rms, respectively. Repeating the analysis with the post‐launch joint gravity model (JGM‐2) suggests that a portion of the meridional dependence observed in JGM‐1 still remains, with a global rms error of 1.2 cm.

publication date

  • September 15, 1994

has restriction

  • bronze

Date in CU Experts

  • April 18, 2014 4:23 AM

Full Author List

  • Christensen EJ; Haines BJ; McColl KC; Nerem RS

author count

  • 4

Other Profiles

International Standard Serial Number (ISSN)

  • 0094-8276

Electronic International Standard Serial Number (EISSN)

  • 1944-8007

Additional Document Info

start page

  • 2175

end page

  • 2178


  • 21


  • 19