In this sub-class, the term "meteorology" includes measurement of certain ambient atmospheric conditions.
G01W 1/00
Meteorology
G01W 1/02
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Instruments for indicating weather conditions by measuring two or more variables, e.g. humidity, pressure, temperature, cloud cover, wind speed (Fulltext... Hierarchy... Expanded...G01W 1/10 takes precedence)
G01W 1/04
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giving only separate indications of the variables measured
Measuring atmospheric potential differences, e.g. due to electrical charges in clouds (measuring potentials in general Fulltext... Hierarchy... Expanded...G01R)
G01W 1/17
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Catathermometers for measuring "cooling value" related either to weather conditions or to comfort of other human environment