Other
Scientific paper
Mar 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977natur.266..147h&link_type=abstract
Nature, vol. 266, Mar. 10, 1977, p. 147, 148. Research supported by the Australian Research Grants Committee and Radio Research
Other
3
Periodic Variations, Satellite Transmission, Signal Fading, Solar Eclipses, Very High Frequencies, Bow Waves, Gravity Waves, Ionospheric Electron Density, Radio Frequency Interference, Short Wave Radio Transmission, Traveling Ionospheric Disturbances
Scientific paper
Results are reported for observations of large-magnitude periodic fadings of VHF radio signals transmitted by six nonsynchronous satellites at a frequency of 149.988 MHz and by another such satellite at 136.740 MHz during the solar eclipse of October 23, 1976. The results are based on amplitude recordings of the radio signals and indicate that the eclipse was associated with the generation of a wave disturbance that affected radio-satellite transmissions in the upper VHF. It is noted that the largest periodic fadings were recorded about the time the eclipse terminated. Some characteristics of the disturbances are discussed which suggest that the eclipse apparently generated TIDs with a number of wavelengths ranging from about 40 to 700 km.
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