In-situ studies of equatorial spread-F over SHAR-steep gradients in the bottomside F-region and transitional wavelength results

Details In-situ studies of equatorial spread-F over SHAR-steep gradients in the bottomside F-region and transitional wavelength results In-situ studies of equatorial spread-F over SHAR-steep gradients in the bottomside F-region and transitional wavelength results

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jatp...53..977p&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 53, Oct. 1991, p. 977-986. Research supported by Departmen

Computer Science

Sound

10

Equatorial Regions, F Region, Ionospheric Electron Density, Ionospheric Sounding, Power Spectra, Spread F, Electrostatic Probes, Gauss Equation, Ionosondes, Ionospheric Drift, Plasma Physics

Scientific paper

RH-560 rockets instrumented with Langmuir probes were launched from SHAR, India (dip 11 deg N) for in situ studies of electron density irregularities associated with equatorial spread-F (ESF) when the F-region plasma was drifting down and strong range spread-F was observed with an ionosonde at SHAR. A high variability was observed in the steepness of the base of the F-region. The bases were found to be steeper during the periods when the F-region plasma was drifting down. On one of the flights irregularities were observed in the region around 280 km where the gradients in electron density were downwards, indicating that the gradient drift instability is the main mechanism for their generation.

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