Measurements and empirical model comparisons of F-region characteristics and auroral oval boundaries during the solstitial SUNDIAL campaign of 1987

Details Measurements and empirical model comparisons of F-region characteristics and auroral oval boundaries during the solstitial SUNDIAL campaign of 1987 Measurements and empirical model comparisons of F-region characteristics and auroral oval boundaries during the solstitial SUNDIAL campaign of 1987

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993angeo..11..601s&link_type=abstract

Annales Geophysicae (ISSN 0992-7689), vol. 11, no. 7, p. 601-613.

Computer Science

Sound

10

Auroral Zones, F Region, Particle Precipitation, Satellite Sounding, Space Plasmas, Diurnal Variations, Ionosondes, Semiempirical Equations

Scientific paper

We report on the SUNDIAL campaign conducted during the solstitial period May 29-June 7, 1987. For generally quiet conditions, a global network of ionosonde data, supported by topside sounder observations of the Intercosmos 1806 satellite, were compared with the IRI. The comparisons included F-region peak characteristics, N(m) F2, and h(m) F2, as well as topside height profiles Ne (z). Overall, the IRI specification of fo F2 was found to be higher than the observations. The difference in the daytime hemispheres was nearly twice that in the night-time hemispheres, with no obvious bias in universal time nor in phenomenological domains. With regard to h(m) F2 and topside profiles, a small data sample shows relatively good agreement with the IRI. In the topside Ne (z) comparisons, there was good qualitative agreement in shape; but there were quantitative differences resulting from differences in N(m) F2. To improve IRI specifications at high latitudes, comparisons also included Feldstein, DMSP, and NOAA/TIROS auroral oval models and their relative agreements with satellite-borne particle measurements of oval boundaries.

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