High Altitude Monolithic Microwave integrated Circuit(MMIC) Sounding Radiometer
The High Altitude monolithic microwave integrated Circuit (MMIC) Sounding Radiometer (HAMSR) is a microwave atmospheric temperature and humidity sounder developed by JPL under the NASA Instrument Incubator Program. Operating with 25 spectral channels in 3 bands ( 50-60Ghz, 118 Ghz 183 GHz region), it provides measurements that can be used to infer the 3-D distribution of temperature, water vapor, and cloud liquid water in the atmosphere, even in the presence of clouds. HAMSR is a self-calibrating cross-track scanning instrument. HAMSR is typically flown at the bottom part of an aircraft where it can look straight down from the air to the ground, right through the atmosphere. During a 1 second scan period, HAMSR obtains a number of overlapping spatial samples of the atmospheric scene below and several views of two internal calibration targets. From an altitude of 20 km, its field of view is about 40 km wide on the ground.
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