Improved IRI predictions for the GEOSAT time period

Details Improved IRI predictions for the GEOSAT time period Improved IRI predictions for the GEOSAT time period

Jan 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997adspr..20.1755b&link_type=abstract

Advances in Space Research, Volume 20, Issue 9, p. 1755-1760.

Physics

1

Scientific paper

Single-frequency altimeter measurements require an estimate of the signal retardation effect in the ionosphere. Ionospheric models like the International Reference Ionosphere (IRI) are being used to obtain these correction factors. Incorporation of worldwide ionosonde measurements is discussed as a way towards more accurate predictions. Using measurements of the F peak critical frequency (foF2) from more than 70 ionosondes we have derived (hour and month dependent) regional and global ionospheric-effective solar indices. Replacing the solar index in IRI with these new indices we could improve the IRI estimates for the GEOSAT time period (1986-1989) by a few percent.

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