Physics
Scientific paper
Apr 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jatp...44..347b&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 44, Apr. 1982, p. 347-358. Research supported by the Australian Research G
Physics
Atmospheric Refraction, Doppler Effect, Ionospheric Propagation, Satellite Transmission, Gravity Waves, Ionospheric Electron Density, Irregularities
Scientific paper
Satellite Doppler fluctuations have been calculated for several representative irregularities of a scale greater than 1 km and of small amplitude. The Doppler shift contribution due to irregularities is evaluated by determining the second variation of the phase path. Theoretical analysis shows that fluctuations may be due to (1) nonstationarity of the ionosphere; (2) irregularities lying below the satellite height and near the straight-line path between the satellite and observer; or (3) irregularities at the satellite or some combination of all three. The fluctuation in Doppler shift is calculated for internal gravity waves, columnar field-aligned irregularities, and full-aligned sheet irregularities. A major contribution to the fluctuation arises from gradients orthogonal to the free space ray.
Bennett Anthony. J.
Dyson Peter L.
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