High Resolution Passive Microwave Sounder Observation on South Indian Region Using Megha-Tropiques Payload
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Emission techniques are generally useful over the majority of the Earth’s surface. Low-frequency channels are better suited to measure the emission due to liquid associated with rain, most techniques to date rely on high-frequency, scattering-based schemes. The passive microwave satellite based data used includes the Special Sensor Microwave Imagers, SSMI Sounder, SAPHIR (Sondeur Atmosph rique du Profil d Humidit Intertropicale par Radiom trie), Advanced Microwave Sounding Units (AMSU), and Microwave Humidity Sounder (MHS), along with land surface model emissivity estimates. The analysis of SAPHIR sounder data brightness temperature data relating to selected vegetated land with different surface obtained for continuous period of 3 years from 2014 to 2016 was achieved. From our study SAPHIR sounder data is found useful for retrieving surface emissivity. This study relates 183.31 ± 11.0 GHz emissivity values, retrieved from a radiative transfer model using collocated SAPHIR sounder brightness temperature measurements. This examination is noteworthy for microwave sounder assimilation in climate conjecture models and for the usage of the information from passive microwave sensors on-board the Indo-French satellite “Megha-Tropiques,” which is committed to tropical environmental studies.
KeywordsSAPHIR Brightness temperature Land surface emissivity Soil moisture
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