Gigahertz scintillations and spaced receiver drift measurements during Project Condor equatorial F region rocket campaign in Peru

Details Gigahertz scintillations and spaced receiver drift measurements during Project Condor equatorial F region rocket campaign in Peru Gigahertz scintillations and spaced receiver drift measurements during Project Condor equatorial F region rocket campaign in Peru

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91.5526b&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, May 1, 1986, p. 5526-5538.

Computer Science

Sound

23

Equatorial Atmosphere, F Region, Radar Scattering, Rocket Sounding, Spread F, Backscattering, Ionospheric Drift, Peru, Scintillation, Temporal Distribution

Scientific paper

Results are given of radar backscatter at 50 MHz, rocket, and VHF/GHz scintillation measurements of spread F irregularities at the magnetic equator in Peru. Specifically, the coordinated set of observations on two evenings, 1 March and 14 March 1983, when the altitude of the F region peak differed by more than 150 km, are discussed. The full complement of equatorial spread F phenomena (the occurrence of 3-m plume structures and VHF/GHz scintillations) were recorded on both evenings. It was found that the radar backscatter with extended plumes occurs in association with maximum 1.7-GHz scintillation; this established that the height-integrated rms electron density deviation of approx. 200-m scale irregularities causing 1.7-GHz scintillations maximizes in extended 3-m plume structures. In spite of the presence of intense and extended plume structures at 3 m, the associated 1.7-GHz scintillation was observed to be very weak in comparison with the saturated GHz scintillations reported from Ascension Island near the crest of the equatorial anomaly (Basu et al., 1983). The spectral index of GHz scintillations was shown to be compatible on the night with the one-dimensional irregularity spectral index as measured by the rocket, whereas on the other night the spectral index of scintillations was far too steep in comparison to the irregularity spectral index in the intermediate scale. The coordinated irregularity drift measurements by the radar interferometer and spaced receiver scintillation measurements indicated that the spaced receiver drift measurements by the radar interferometer and spaced receiver scintillation measurements indicated that the spaced receiver drifts are about 10-20 percent higher on both nights.

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