Physics
Scientific paper
May 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83.2091c&link_type=abstract
Journal of Geophysical Research, vol. 83, May 1, 1978, p. 2091-2102. Army-sponsored research.
Physics
4
Doppler Effect, Incidence, Ionospheric Propagation, Scintillation, Spectrum Analysis, Analysis Of Variance, Interferometry, Ionospheric Electron Density, Magnetic Storms, Navigation Satellites, Phase Shift
Scientific paper
The variance and spectra of angle-of-arrival and Doppler fluctuations were estimated by using 150- and 400-MHz transmissions from the low-orbiting U.S. Navy navigation satellites observed at the Millstone Hill radar facility. A theoretical model for the variance and spectra was also constructed by using the Rytov approximation and a power law power spectrum model for the electron density fluctuations. The model provided a means for the estimation of both the axial ratio and the location of the lower edge of the irregularity region, using only angle-of-arrival and Doppler observations made at a single location. Good agreement was obtained between the model estimates and observations. Analysis of data from two magnetic storms revealed simultaneous occurrences of E region and F region irregularities at invariant latitudes north of 56 deg.
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