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UAH satellite temperature dataset
The UAH satellite temperature dataset, developed at the University of Alabama in Huntsville, attempts to infer the temperature of the atmosphere at various levels from satellite measurements of radiance.
It was one of the first global temperature datasets developed from satellite information and has been used as a tool for research since the 1990s. It has proved controversial as, previously, there were inconsistencies between the UAH dataset and surface measurements. Significant corrections to the UAH product during the late 1990s and the first decade of the 2000s have resolved many of those differences.
The dataset is published by John Christy et al. and formerly jointly with Roy Spencer.
==Satellite temperature measurements==
(詳細はSatellites do not measure temperature directly. They measure radiances in various wavelength bands, from which temperature may be inferred. The resulting temperature profiles depend on details of the methods that are used to obtain temperatures from radiances. As a result, different groups that have analyzed the satellite data have obtained different temperature data. Among these groups are Remote Sensing Systems (RSS) and the University of Alabama in Huntsville (UAH). The satellite series is not fully homogeneous - it is constructed from a series of satellites with similar but not identical instrumentation. The sensors deteriorate over time, and corrections are necessary for satellite drift and orbital decay. Particularly large differences between reconstructed temperature series occur at the few times when there is little temporal overlap between successive satellites, making intercalibration difficult.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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