Receivers measuring reflected signals are used to infer surface roughness and reflectivity, which can be related to surface conditions like ocean winds, soil moisture, and ice type. Specialized receivers measuring occulted signals enable high-resolution estimates of atmospheric density and temperature. Methods using standard ground-based receivers provide estimates of atmospheric water vapor and soil moisture. ![]() Observations of the modified signals from the ground and from airborne and spaceborne platforms allow for scientific study of the ionosphere, atmosphere, and Earth surface. ![]() ![]() GNSS signals are influenced by the transmission media and interaction with surfaces near the receiving antenna. Application of GNSS to Environmental StudiesĬolorado Center for Astrodynamics Research
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