MEASUREMENTS OF O-3, H2O AND CLO IN THE MIDDLE ATMOSPHERE USING THE MILLIMETER-WAVE ATMOSPHERIC SOUNDER (MAS)

The Millimeter-Wave Atmospheric Sounder (MAS) is a shuttle-based limb- sounding instrument designed for global spectroscopic studies of O-3, and constituents important in O-3 photochemistry, in the middle atmosp here. It is part of the NASA's Atmospheric Laboratory for Applications and Science (ATLAS) spacelab shuttle mission. This paper presents an overview of the instrument, operation, and data analysis. In addition, as an example of the results, we present zonal average retrievals for O-3, H2O, and ClO obtained in ATLAS 1. The MAS O-3 and H2O measuremen ts are shown to agree well with simultaneous observations made with th e UARS MLS instrument.