Journal cover Journal topic
Annales Geophysicae An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 1.490 IF 1.490
  • IF 5-year value: 1.445 IF 5-year
    1.445
  • CiteScore value: 2.9 CiteScore
    2.9
  • SNIP value: 0.789 SNIP 0.789
  • IPP value: 1.48 IPP 1.48
  • SJR value: 0.74 SJR 0.74
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 88 Scimago H
    index 88
  • h5-index value: 21 h5-index 21
Volume 20, issue 8
Ann. Geophys., 20, 1253–1256, 2002
https://doi.org/10.5194/angeo-20-1253-2002
© Author(s) 2002. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 20, 1253–1256, 2002
https://doi.org/10.5194/angeo-20-1253-2002
© Author(s) 2002. This work is distributed under
the Creative Commons Attribution 3.0 License.

  31 Aug 2002

31 Aug 2002

Letter to the Editor
Abel transform inversion of radio occultation measurements made with a receiver inside the Earth’s atmosphere

S. B. Healy1, J. Haase3,2, and O. Lesne2 S. B. Healy et al.
  • 1Met office, Bracknell, UK
  • 2ACRI-ST, Sophia-Antipolis, France
  • 3Purdue University, Department of Earth and Atmospheric Sciences, West Lafayette, USA
  • Correspondence to: S. B. Healy
  • (sean.healy@metoffice.com)

Abstract. 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.

Key words. Atmospheric composition and structure (pressure, density and temperature) – Radio science (remote sensing)

Publications Copernicus
Download
Citation