DocumentCode :
576272
Title :
GEMINI: Geosynchronous SAR for Earth Monitoring by Interferometry and Imaging
Author :
Guarnieri, Andrea Monti ; Tebaldini, Stefano ; Rocca, Fabio ; Broquetas, Antoni
Author_Institution :
Dipt. di Elettron. e Inf., Politec. di Milano, Milan, Italy
fYear :
2012
fDate :
22-27 July 2012
Firstpage :
210
Lastpage :
213
Abstract :
In this paper we discuss a preliminary design for a constellation of geosynchronous (GEO) Synthetic Aperture Radars (SAR). The key design concept is to employ one or more pairs of closely-spaced twin receivers flown onboard GEO minisatellites moving with a velocity of few meters per second with respect to the Earth´s surface, so as to form a synthetic aperture on the order of few tenths of kilometers twice a day. The employement of closely-spaced receivers would enable the estimation of the temporal gradient of the tropospheric delay via along track Interferometry, resulting in the possibility to coherently integrate the signal over an aperture time on the order of hours. As a result an area as wide as one thousand kilometers could be imaged while providing: i) continuous temporal coverage at coarse resolution (hundreds of meters); ii) high resolution (few meters) imaging and interferometric capabilities two or more times a day by integrating the signal over few hours, thus ensuring high SNR performance (for stable targets) with a transmitted power comparable to currently operated spaceborne SARs.
Keywords :
artificial satellites; geophysical image processing; geophysical techniques; image resolution; interferometry; radar imaging; radio receivers; remote sensing by radar; spaceborne radar; synthetic aperture radar; troposphere; Earth monitoring method; Earth surface; GEMINI; GEO minisatellites; closely-spaced receivers; closely-spaced twin receivers; coarse resolution; continuous temporal coverage; geosynchronous SAR; geosynchronous synthetic aperture radars; high image resolution; interferometry; spaceborne SAR; temporal gradient estimation; tropospheric delay; Delay; Image resolution; Low earth orbit satellites; Monitoring; Receivers; Signal to noise ratio; Synthetic aperture radar;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2012 IEEE International
Conference_Location :
Munich
ISSN :
2153-6996
Print_ISBN :
978-1-4673-1160-1
Electronic_ISBN :
2153-6996
Type :
conf
DOI :
10.1109/IGARSS.2012.6351601
Filename :
6351601
Link To Document :
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