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Proceedings Paper

ENVISAT ASAR orbit error analysis and case study
Author(s): Tao Li; Jingnan Liu; Mingsheng Liao; Ye Xia
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Paper Abstract

Satellite's position is the major role for determining the baseline errors in interferograms. With high precision satellite position, the flat earth component can be removed. Envisat satellite bases on DORIS system for controlling and calculating its orbit within several centimeters precision. However, even several millimeters baseline error may cause fringes in the interferogram. This paper studied the baseline error profiles in interferograms and analyzed the Envisat satellite orbit characters. The linear part and the nonlinear part of the baseline errors in the interferograms have been studied. Fourier transformation for the two parts has been tested. With ASAR data sets, a case study has been made. The results showed that the orbits in ASAR products were not precise enough for interferometry and precise orbits from Delft and GFZ were more reliable. The linear part of the baseline error is easy to be discerned and mimicked but the nonlinear part is hard to derive and eliminate. The satellite orbit characters should be studied more to reveal the nonlinear part baseline errors.

Paper Details

Date Published: 28 October 2006
PDF: 7 pages
Proc. SPIE 6419, Geoinformatics 2006: Remotely Sensed Data and Information, 641928 (28 October 2006); doi: 10.1117/12.713418
Show Author Affiliations
Tao Li, Wuhan Univ. (China)
Jingnan Liu, Wuhan Univ. (China)
Mingsheng Liao, Wuhan Univ. (China)
Ye Xia, GeoForschungsZentrum Potsdam (Germany)


Published in SPIE Proceedings Vol. 6419:
Geoinformatics 2006: Remotely Sensed Data and Information
Liangpei Zhang; Xiaoling Chen, Editor(s)

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