Radio occultation data analysis by the radioholographic method
Hocke, K. and Pavelyev, A. and Yakovlev, O. and Barthes, S. and Jakowski, N. (1999) Radio occultation data analysis by the radioholographic method. Journal of Atmospheric and Solar-Terrestrial Physics, Vol. 61 (Issue 16), pp. 1169-1177.
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The radioholographic method is briefly described and tested by using data of 4 radio occultation events observed by the GPS/MET experiment on 9 February 1997. The central point of the radioholographic method (Pavelyev, 1998) is the generation of a radiohologram along the LEO satellite trajectory which allows the calculation of angular spectra of the received GPS radio wave field at the LEO satellite. These spectra are promising in view of detection, analysis and reduction of multipath/diffraction effects, study of atmospheric irregularities and estimation of bending angle error. Initial analysis of angular spectra calculated by the multiple signal classification (MUSIC) method gives evidence that considerable multibeam propagation occurs at ray perigee heights below 20 km and at heights around 80¯120 km for the 4 GPS/MET occultation events. Temperature profiles obtained by our analysis (radioholographic method, Abel inversion) are compared with those of the traditional retrieval by the UCAR GPS/MET team (bending angle from slope of phase front, Abel inversion). In 3 of 4 cases we found good agreement (standard deviation T~1.5°K between both retrievals at heights 0¯30 km).
|Title:||Radio occultation data analysis by the radioholographic method|
|Journal or Publication Title:||Journal of Atmospheric and Solar-Terrestrial Physics|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 1169-1177|
|Keywords:||Radioholographic method, Data Analysis, Radio Occultation|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|HGF - Program Themes:||W EO - Erdbeobachtung|
|DLR - Research area:||Space|
|DLR - Program:||W EO - Erdbeobachtung|
|DLR - Research theme (Project):||UNSPECIFIED|
|Institutes and Institutions:||Institute of Communication and Navigation|
|Deposited By:||elib DLR-Beauftragter|
|Deposited On:||16 Sep 2005|
|Last Modified:||06 Jan 2010 20:43|
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