Comparison of ionospheric models for single-frequency radar altimeters

Details Comparison of ionospheric models for single-frequency radar altimeters Comparison of ionospheric models for single-frequency radar altimeters

Jan 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997adspr..20.1769u&link_type=abstract

Advances in Space Research, Volume 20, Issue 9, p. 1769-1772.

Computer Science

Performance

1

Scientific paper

Relative performances of available ionospheric models for computing path delay corrections to radar altimeter range data have been assessed using altimeter crossover measurements computed for the single-frequency altimeter measurements collected by Geosat and ERS-1, and for the dual-frequency altimeter measurements collected by TOPEX/POSEIDON. The models studied include IRI-90, IRI-95, and JPL GIM. The models are further compared with the ionospheric delay computed from TOPEX/POSEIDON dual-frequency altimeter data. Crossover analyses indicate that IRI-95 is an improved model over IRI-90 for computing ionospheric delays for all three altimetric satellites during low to medium solar activity periods. It is found that smoothing of the TOPEX/POSEIDON dual-frequency ionospheric correction significantly improved the precision of the TOPEX/POSEIDON data.

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