The Sentinel-3 (S-3) Microwave Radiometer (MWR) is being developed by EADS CASA Espacio (ECE) under contract with Thales Alenia Space France (TAS-F) and the European Space Agency (ESA). This instrument, along with a radar altimeter and a precise orbit determination package, is part of a topographic mission in the frame of the Global Monitoring for Environment and Security (GMES) programme. The MWR will determine the amount of humidity in the atmosphere in order to correct for the wet tropospheric path delay of the altimeter data by means of brightness temperature measurements at 23.8 GHz and 36.5 GHz. This paper describes the design and development plan for the MWR instrument.
Resumen: El radiómetro MWR, desarrollado por EADS CASA Espacio, constituye la misión topográfica de Sentinel-3 (S3) junto al radar altímetro SRAL. Su función es la generación de información auxiliar para la corrección troposférica de las medidas del SRAL. Sus datos también pueden servir para caracterizar magnitudes físicas del suelo y la criosfera, así como para la evaluación de balances energéticos. El MWR es un radiómetro de inyección de ruido (NIR) que funciona a dos frecuencias (23,8 y 36,5 GHz) e incorpora una bocina para la obtención de la temperatura de brillo del cielo como medio de calibración autónoma.Palabras clave: NIR, calibración, precisión, resolución radiométrica.
sentinel-3 MWR Microwave Radiometer -Our contribution to the success of the copernicus programmeAbstract: The MWR builds, together with the SRAL altimeter, the S3 topography mission. The MWR, developed by EADS CASA Espacio as prime contractor, provides information for tropospheric path correction of SRAL measurements. MWR data can also be used for determining surface emissivity and soil moisture over land, surface energy budget investigations and ice characterization. The MWR instrument is a Noise Injection Radiometer (NIR), working at two frequencies (23.8/36.5 GHz), embarking a dual frequency horn antenna pointing to the cold sky for embedded autonomous calibration.
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