GEMINI: geosynchronous SAR for Earth monitoring by interferometry and imaging
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hdl:2117/18521
Document typeConference report
Defense date2012
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Rights accessRestricted access - publisher's policy
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 com-
parable to currently operated spaceborne SARs.
CitationMonti , A. [et al.]. GEMINI: geosynchronous SAR for Earth monitoring by interferometry and imaging. A: IEEE International Geoscience and Remote Sensing Symposium. "IGARSS 2012: International Geoscience and Remote Sensing Symposium". Munich: Institute of Electrical and Electronics Engineers (IEEE), 2012, p. 210-213.
ISBN978-1-4673-1159-5
Publisher versionhttp://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6351601
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