Combinations of Satellite Crossovers to Study Orbit and Residual Errors in Altimetry |
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| Authors: | Jaroslav Kloko?ník Carl A Wagner |
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| Institution: | (1) Academy of Sciences of the Czech Republic, Astronomical Institute, CZ‐251, 65 Ondřejov Observatory, Czech Republic; e-mail;(2) NOAA/NOS, 1305 East‐West Highway, Silver Spring, MD, 20910, USA; e-mail |
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| Abstract: | We define combinations of dual‐ and single‐satellite crossover differences to isolate both stationary orbit‐geopotential and
non‐geopotential errors in altimetry data. Specifically two types of combinations are found useful. While no combination of
differences can resolve the full radial error of single or paired satellites, an approximation of the mean or geographically
correlated error of the generally dominant lower orbit of a pair can be found from one kind (substitutions). (The variable
part of the error is always available from the single‐satellite crossover differences.) A second useful combination type is
found to yield no geopotential orbit error (zeros): uniquely, these can reveal errors in altimetry from imperfect media corrections
as well as oceanographic changes in sealevel. The later circumstance is particularly important when the missions for a pair
of satellites are disparate in time.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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| Keywords: | satellite altimetry satellite dynamics radial orbit component/accuracy crossovers combinations of single‐ and dual‐ satellite crossovers |
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