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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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Abstract

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).

Document Type:Article
Additional Information: LIDO-Berichtsjahr=2000,
Title:Radio occultation data analysis by the radioholographic method
Authors:
AuthorsInstitution or Email of Authors
Hocke, K.UNSPECIFIED
Pavelyev, A.UNSPECIFIED
Yakovlev, O.UNSPECIFIED
Barthes, S.UNSPECIFIED
Jakowski, N.UNSPECIFIED
Date:1999
Journal or Publication Title:Journal of Atmospheric and Solar-Terrestrial Physics
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:Vol. 61
Page Range:pp. 1169-1177
Status:Published
Keywords:Radioholographic method, Data Analysis, Radio Occultation
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):UNSPECIFIED
Location: Oberpfaffenhofen
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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