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An imaging algorithm for synthetic aperture interferometric radiometers with built-in RFI mitigation
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hdl:2117/24644
Document typeConference report
Defense date2014
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Rights accessRestricted access - publisher's policy
All rights reserved. This work is protected by the corresponding intellectual and industrial
property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public
communication or transformation of this work are prohibited without permission of the copyright holder
Abstract
Radio Frequency Interference (RFI) is probably one of the most important limiting factors in the accuracy of the brightness temperatures measured by microwave radiometers. Due to the proximity of the 'protected' L-band (1400-1427 MHz) to numerous services (communication, localization, broadcast...), this band is seriously affected by RFI, preventing ESA's SMOS mission or NASA/CONAE Aquarius mission from retrieving soil moisture and ocean salinity over large areas of the world. In this work, a technique is presented as an attempt to mitigate the RFI at its origin, when the synthetic aperture image is being formed. The technique is based on the well-known beam- and null-steering techniques used in today's advanced communication systems, but generalized to the synthetic aperture case, by means of the so-called equivalent array factor, which allows to interpret the 'synthetic aperture array' as a 'real aperture array' with an antenna in the position of each baseline. © 2014 IEEE.
CitationCamps, A.; Hyuk, P.; Gonzalez, V. An imaging algorithm for synthetic aperture interferometric radiometers with built-in RFI mitigation. A: Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment. "13th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment: MicroRad 2014: proceedings: 24-27 March 2014: Pasadena, California, USA". Pasadena: Institute of Electrical and Electronics Engineers (IEEE), 2014, p. 39-43.
ISBN978-147994644-0
Publisher versionhttp://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6878904
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