NDLI: Calibration experiments of ERS-1 SAR with active radar calibrator in Japan

Content Provider	IEEE Xplore Digital Library
Author	Satake, M. Fujita, M. Hanado, H. Horie, H. Sato, K. Ochiai, S.
Copyright Year	1994
Description	Author affiliation: Commun. Res. Lab., Kashima Space Res. Center, Ibaraki, Japan (Satake, M.)
Abstract	The authors carried out calibration experiments of the C-band synthetic aperture radar (SAR) of the first European Remote-Sensing Satellite (ERS-1) with its three passes over Japan in June, July, and August 1993, employing an active radar calibrator (ARC) and a corner reflector (CR) both located in the site of Kashima Space Research Center (140/spl deg/40'E, 35/spl deg/57'N) of the Communications Research Laboratory. The ARC has a large radar cross section (RCS) of over 60 dBm/sup 2/, with a function to shift the frequency of signals when retransmits that makes the position of the ARC shift in the SAR image. Frequency shifts of the ARC were set to 0, 200, 400 Hz for the three passes each, so that the ARC echo should appear at 0, 640, 1280 m shifted in the azimuth direction from its actual location in each SAR image. Received power by the ARC was recorded during the overpasses, which shows an antenna pattern of the SAR. The authors also used a corner reflector of 1.1 m square trihedral (RCS=42.4 dBm/sup 2/) as a landmark, as well as another calibration target. Obtained SAR image data processed by National Space Development Agency of Japan (NASDA), the authors have examined image amplitude (data numbers) and locations of both of the ARC and the CR. It is seen in the SAR images, as expected, that the positions of the ARC are shifted depending on the shift of frequency.
Starting Page	2209
Ending Page	2211
File Size	216948
Page Count	3
File Format	PDF
ISBN	0780314972
DOI	10.1109/IGARSS.1994.399694
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-08-08
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Calibration Synthetic aperture radar Radar cross section Frequency Radar remote sensing Spaceborne radar Chromium Remote sensing Artificial satellites Azimuth
Content Type	Text
Resource Type	Article

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