The National Polar-orbiting Operational Environmental Satellite System (NPOESS) Atmospheric Sounding Testbed - Microwave Temperature Sounder (NAST-MTS) contains two microwave radiometer systems covering the spectral ranges of 50-56 GHz with eight single-sideband channels, and 115-123 Ghz with nine double-sideband channels centered on the 118.75 Ghz oxygen line. Both radiometers scan +/- 65 degrees from nadir and also view two black-body targets and zenith for calibration. The temperature weighting functions cover altitudes from the surface to ER-2 altitude. A video camera in the MTS package provides ancillary digitized stereo images for cloud location.
Due to the lapse in federal government funding, NASA is not updating this website. We sincerely regret this inconvenience.