Sensing atmospheric structure using small-scale space geodetic networks

Details Sensing atmospheric structure using small-scale space geodetic networks Sensing atmospheric structure using small-scale space geodetic networks

Aug 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.2445e&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 16, p. 2445-2448

Physics

11

Radio Science: Atmospheric Propagation, Meteorology And Atmospheric Dynamics: Remote Sensing, Atmospheric Composition And Structure: Instruments And Techniques

Scientific paper

We describe two ways in which horizontal atmospheric structure affects GPS observations. For a single site, such structure results in azimuthal variations in the atmospheric propagation delay. For a network of sites, the structure will induce an intersite variability in the atmospheric propagation delays. The former effect is more sensitive to high-than low-altitude atmospheric gradients above the site, whereas the latter is insensitive to the altitude of the gradient above the network. This difference in sensitivity can be utilized to probe the local vertical structure of the atmosphere. We demonstrate this technique using GPS data from a small network on the Swedish west coast. We infer for one observing session the presence of a strong horizontal gradient which varies with height.

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