Concept information
Preferred term
MAS/ATLAS
Definition
- The objective of the Millimeter Wave Atmospheric Sounder (MAS) experiment on Atmospheric Laboratory for Application and Science (ATLAS) was to study the composition and dynamic structure of the stratosphere, mesosphere, and lower thermosphere in the 20 to 90 km altitude range (middle atmosphere) with a height resolution as low as 4 km. MAS provided simultaneous information on the temperature and ozone distribution in the 20 to 90 km region and information on water vapor and chlorine monoxide (ClO). The MAS is a passive limb-sounding total power microwave radiometer-spectrometer. The equipment consists of a steerable parabolic antenna which focuses the radiation into the MAS Reciever Electronics (MRE). The MRE consists of three radiometers operating at frequencies 61 to 64 GHz, 183 GHz and 204 GHz. The signals are converted to intermediate frequencies below 6 GHz which are then analyzed by five filterbanks in the Filter Electronic Box (FEB) which consists of 240 filters. The antenna can position in elevation about 4 degrees with a total scan of about 13 degrees. The instrument is expected to be flown on subsequent ATLAS missions. The MAS on ATLAS provided critical correlative measurements with the Microwave Limb Sounder (MLS) and other instruments on the Upper Atmosphere Research Satellite (UARS). MAS was flown on all three ATLAS missions. See Croskey, et al,"The Milimeter Wave Atmospheric Sounder (MAS): A Shuttle-Based Remote Sensing Experiment",IEEE Trans. Microwave Theory and Techniques, Vol. 40, No. 6, June 1992, pp. 1090-1100. For more information on MAS and online MAS images see: "http://auc.dfd.dlr.de/MAS/" (en)
Broader concept
- Profilers/Sounders (en)
URI
https://gcmd.earthdata.nasa.gov/kms/concept/c4ed5cfc-b7c3-4a6f-822c-35e81a39cc0e
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