Abel transform inversion of radio occultation measurements made with a receiver inside the Earth's atmosphere

Details Abel transform inversion of radio occultation measurements made with a receiver inside the Earth's atmosphere Abel transform inversion of radio occultation measurements made with a receiver inside the Earth's atmosphere

Aug 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002angeo..20.1253h&link_type=abstract

Annales Geophysicae, vol. 20, Issue 8, pp.1253-1256

Physics

2

Scientific paper

Radio occultation measurements made with a receiver inside the Earth’s atmosphere can be inverted, assuming local spherical symmetry, with an Abel transform to provide an estimate of the atmospheric refractive index profile. The measurement geometry is closely related to problems encountered when inverting seismic time-travel data and solar occultation measurements, where the Abel solution is well known. The method requires measuring both rays that originate from above and below the local horizon of the receiver. The Abel transform operates on a profile of "partial bending angles" found by subtracting the positive elevation measurement from the negative elevation value with the same impact parameter. In principle, the refractive index profile can be derived from measurements with a single frequency GPS receiver because the ionospheric bending is removed when the partial bending angle is evaluated.

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