2026-04-17T03:52:23Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/229902025-07-17T14:09:02Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc Torres Torres, Francisco author Camps Carmona, Adriano José author Corbella Sanahuja, Ignasi author Bará Temes, Francisco Javier author Duffo Ubeda, Núria author Vall-Llossera Ferran, Mercedes Magdalena author 2000-01 This paper starts with a summary and classification of errors of any kind that corrupt the fundamental measurement performed by an InR (interferometric radiometer), the so-called visibilities. This summary is based on prior works from the authors concerning end-to-end rnodeling of the instrument. The paper follows with a trade-off analysis of the capability of different calibration approaches to remove those errors and, at the end, to recover a map of brightness temperatures. In order to perform the trade-off analysis, extensive simulations have been undertaken to analyze the approaches found in the literature: the redundant space method, used in radio astronomy, the G-matrix method, used in ESTAR, and the Noise injection method. both centralized and distributed, proposed for MIRAS. A short description is made of each one and a comparative table is presented. The trade off is presented in terms of what kind of errors can be removed by each method, hardware requirements, robustness and on-ground/on-board input data required to perform such error correction. Peer Reviewed Postprint (published version) Àrees temàtiques de la UPC::Enginyeria de la telecomunicació Àrees temàtiques de la UPC::Enginyeria civil::Geologia::Oceanografia Radiation -- Measurement Soil moisture Radiació -- Mesurament Sòls -- Humitat Calibration methods in large interferometric radiometers devoted to earth observation