Relationship between nightime total electron content enhancements and VHF scintillations at the equator

Details Relationship between nightime total electron content enhancements and VHF scintillations at the equator Relationship between nightime total electron content enhancements and VHF scintillations at the equator

Oct 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgr....89.9009b&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 89, Oct. 1, 1984, p. 9009-9013.

Computer Science

Sound

7

Ionospheric Electron Density, Night Sky, Satellite Sounding, Scintillation, Ats 6, Equatorial Atmosphere, F Region, Ground Stations, Very High Frequencies

Scientific paper

The relationship between nighttime enhancements in total content (TEC) and VHF amplitude scintillations has been studied using the ATS 6 satellite data obtained from two closely located equatorial stations (Ootacamund and Thumba) for the period October 1975 to July 1976. The results show that the occurrence and various other characteristics of the TEC enhancements are correlated to corresponding characteristics of the scintillation index SI. The peak value of the SI index is found to increase linearly with that of the TEC enhancement until it reaches the saturation value of nearly 1 for the peak TEC enhancement of about 0.6 x 10 to the 17th/sq m. Both phenomena start mostly prior to midnight with the TEC enhancement being delayed by one to one-and-one-half hours with respect to the scintillations. From the results it is clear that the TEC enhancements cannot be regarded as a source for the small-scale irregularities but rather they both seem to depend on the postsunset vertical drifts in the F layer.

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