Analysis of the CHAMP Experimental Data
on Radio-Occultation Sounding of the Earths Atmosphere

M. E. Gorbunov*, K. B. Lauritsen**, A. Rodin***, M. Tomassini***, and L. Kornblueh****

* Oboukhov Institute of Atmospheric Physics, Russian Academy of Sciences,
Pyzhevskii per. 3, Moscow, 119017 Russia

** Danish Meteorological Institute, Copenhagen DK-2100, Denmark

*** German Weather Service, Offenbach D-63004, Germany

**** Max Planck Institute for Meteorology, Hamburg D-20146, Germany

e-mail: gorbunov@dkrz.de, andreas.rhodin@dwd.de

Received April 23, 2004; in final form, May 12, 2005

Abstract—A method of processing the radio-occultation data on the Earth’s atmosphere obtained from the
Challenging Minisatellite Payload (CHAMP) is described. The method includes (i) filtering noises and inferior
data on the basis of analysis of local spatial spectra of the measured wave field, (ii) determining bending angles
by the canonical transform method, (iii) evaluating errors in the resulting bending angles from analysis of local
spectra of the transformed wave field, and (iv) evaluating errors in the retrieved temperature profiles. Examples
of processing and analyzing the measurement data are presented.

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