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ERS-2 and ENVISAT orbit control: current and future strategy - the impact on the interferometric baselines

Berthyl Duesmann(1) and Itziar Barat(1)

(1) ESA, Keplerlaan 1, 2200 AG Noordwijk, Netherlands


Early 2007, the orbit maintenance strategy for Envisat has been optimised. The main objective was to reduce the interferometric baselines over the poles in support of the International Polar Year. In Fall 2007, the inclination of the orbit of ERS-2 has been amended, to achieve 2 km baselines over the Arctic region between ERS-2 and Envisat. A 2 km baseline is required to compensate for the difference in SAR frequency. In Autumn 2010, Envisat will be manoeuvred in a lower orbit and no inclination correction will be applied anymore. The main objective of this manoeuvre is to reach the final end-of-life altitude during the operational mission, and in addition to extend the mission by possibly4 years.

The impact of the current orbit maintenance strategies for Envisat, the inclined ERS-2 orbit and the impact of the future orbit for Envisat on SAR interferometric baselines will be explained. The resulting baselines obtained in 2007 will be reported.


Workshop presentation

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry