Satellite temperature measurements in the 40-90 km region by the Pressure Modulator Radiometer

Computer Science – Sound

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Atmospheric Temperature, Carbon Dioxide, Infrared Radiometers, Nimbus 6 Satellite, Temperature Measurement, Thermal Emission, Atmospheric Radiation, Doppler Effect, Mesopause, Pressure Sensors, Rossby Regimes, Satellite Observation, Stratosphere, Temperature Distribution, Wave Amplification, Wave Propagation, Weighting Functions

Scientific paper

Nimbus 6 carries the Pressure Modulator Radiometer which measures thermal emission from carbon dioxide at 15 microns and thereby sounds temperature. The weighting function is continuously variable with height, but the measurements relate essentially to three independent layers 15-20 km thick centered at about 42 km, 62 km and 85 km. Daily global coverage has been obtained for these levels since launch in June 1975. Data for a 10 km thick layer centered at about 46 km were also obtained for several months. The paper briefly describes the results obtained. A sequence of maps are given for Feb. 7, 1976 when a particularly large amplitude wave was observed near the mesopause. Nimbus 5 Selective Chopper Radiometer data are also given to show the temperature field in the lower stratosphere. Initial results show that in winter planetary waves continue to tilt westward with increasing height as far as the mesopause, while the maximum amplitude occurs near the stratopause.

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