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Basic tests for checking validity of field data
Courtesy of Applied Technologies, Inc. (ATI)
The following guidelines are suggested for verifying micrometeorological data gathered in field experiments. It is assumed, for simplicity, that the observations being tested are made over open, relatively flat and uniform terrain, with small roughness elements. It is also assumed that the sensors and the data acquisition and recording hardware are basically sound and that the purpose of the tests is to determine how good the measurements are. For this we divide the data into two categories: a) profile data from slow-response sensors like cup anemometers, glass-encapsulated platinum wire thermometers, and dew-point hygrometers, and b) turbulence data from sonic anemometers, sonic thermometers, infrared (or Lyman alpha) hygrometers. The former has response times of the order of seconds, or even minutes, while the latter typically has a usable frequency range extending to at least 5 Hz.
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