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Radiometric performance of interferometric synthetic aperture radiometer HUT-2D

This paper describes a test campaign carried out with synthetic aperture radiometer HUT-2D to establish understanding to the instrument's radiometric performance. The test campaign consists of measurements of the radiation from the sky, which is considered as a well-known target, and measurements of a pure sea water scene, which brightness temperature is possible to model. Results of the tests are used to address instrument's radiometric sensitivity and radiometric resolution. The experimental results are discussed and compared to the theoretical values, where applicable.