The study of the remote sensing and measurement of quantities.
Optical theodolites use a telescope to aid in tracking.
A type of electrical therometer whose electrical resistance decreases markedly and monotonically as the temperature increases. This instrument is often used on radiosondes or rocketsondes . A continuous trace of temperature variation with time, typically produced by a thermograph . The thermosphere extends outward toward space and includes the exosphere and most or all of the ionosphere . Normally this region has a more or less regular decrease of air temperature with increasing altitude, considerable vertical wind motion, appreciable water vapor, and weather.