Ers-envisat Cross-interferometry Results over Egypt
نویسندگان
چکیده
In this contribution we report on ERS-ENVISAT Tandem (EET) cross-interferometry (CInSAR) results achieved over Egypt. Over the Nile Delta an EET pair with a perpendicular baseline of 1948m was used to generate a DEM. Thanks to the long perpendicular baseline EET CInSAR showed a good potential to generate accurate DEMs over this relatively flat landscape. The result achieved is compared with the SRTM 3” DEM of the area. The EET CInSAR DEM is clearly more sensitive to height variations in the meter to 10 meter range and shows much less “height noise”. Low relief topographic structures can be better identified. This is also confirmed further south in a desert area. Apart from the interferometric phase we also investigated the EET CInSAR coherence and its dependence on the land cover. For comparison we processed ERS-1/2 Tandem pairs. The characteristics of ERS-1/2 Tandem pairs are similar in that the time interval between the acquisitions is short (1 day versus the 28 minutes). What is significantly different is the much longer perpendicular baseline of the EET pair.
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