Phase and baseline calibration for microwave interferometric radiometers sing beacons
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hdl:2117/335444
Tipus de documentArticle
Data publicació2020-08-01
EditorInstitute of Electrical and Electronics Engineers (IEEE)
Condicions d'accésAccés obert
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Abstract
The relative phase and amplitude calibration between individual receiving elements are one of the key challenges in interferometric microwave radiometry. For monolithic interferometers, for example the Microwave Imaging Radiometer with Aperture Synthesis (MIRAS) on board the Soil Moisture and Ocean Salinity (SMOS) mission, the calibration of these two parameters is accomplished by correlated noise injection, where a noise signal from a central noise source is distributed to multiple elements in phase, and any measured phase and amplitude differences can be measured and compensated. As new
multisatellite interferometers are being proposed, a new strategy capable of calibrating these errors between the free-flying antennas as well as any antenna position errors is required. In this article, a new calibration scheme is proposed which uses a set of microwave beacons in place of the central noise source,
placed at known locations within the interferometer’s field of view. The visibility function produced by these point-sources can be precalculated, and any errors between the calculated and the measured visibility samples can be attributed to the errors to be determined.
Descripció
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CitacióPark, H. [et al.]. Phase and baseline calibration for microwave interferometric radiometers sing beacons. "IEEE transactions on geoscience and remote sensing", 1 Agost 2020, vol. 58, p. 5242.
ISSN0196-2892
Versió de l'editorhttps://ieeexplore.ieee.org/document/8984318
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phase.pdf | 12,63Mb | Visualitza/Obre |