ginjawarrior
Well-Known Member
Lawdy son.... ur not up on the subject are you.... all those weather stations in the mountains... and rural areas.... you don't think there's some schlub walking up there and recording the data do you? Those stations are all read via SATELLITE.
The articles have always been about the satellites.... holey moley...
Satellite temperature measurements
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Comparison of ground based (blue) and satellite based (red: UAH; green: RSS) records of temperature variations since 1979. Trends plotted since January 1982.
Atmospheric temperature trends from 1979-2009 based on satellite measurements.
Satellite temperature measurements have been obtained from the troposphere since late 1978. By comparison, the usable balloon (radiosonde) record begins in 1958 but is less geographic coverage and is less uniform.
Satellites do not measure temperature as such. They measure radiances in various wavelength bands, which must then be mathematically inverted to obtain indirect inferences of temperature.[1][2] 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 to calculate temperature trends have obtained a range of values. Among these groups are Remote Sensing Systems (RSS) and the University of Alabama in Huntsville (UAH). Furthermore the satellite series is not fully homogeneous - it is contstructed from a series of satellites with similar but not identical instrumentation. The sensors are subject to fade over time, and corrections are necessary for satellite drift in orbit. Particularly large differences between reconstructed temperature series occur at the few times when there is little temporal overlap between successive satellites, making intercalibration difficult.