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Comparison of ionospheric radio occultation CHAMP data with IRI 2001

Jakowski, N. and Tsybulya, K. (2004) Comparison of ionospheric radio occultation CHAMP data with IRI 2001. Advances in Radio Science, Kleinheubacher Berichte 2003, 2 (1), pp. 275-279.

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Abstract

Abstract. GPS radio occultation measurements on board low Earth orbiting satellites can provide vertical electron density profiles of the ionosphere from satellite orbit heights down to the bottomside. Ionospheric radio occultation (IRO) measurements carried out onboard the German CHAMP satellite mission since 11 April 2001 were used to derive vertical electron density profiles (EDP’s) on a routine basis. About 150 vertical electron density profiles may be retrieved per day thus providing a huge data basis for testing and developing ionospheric models. Although the validation of the EDP retrievals is not yet completed, the paper addresses a systematic comparison of about 78 000 electron density pro- files derived from CHAMP IRO data with the International Reference Ionosphere (IRI 2001). The results are discussed for quite different geophysical conditions, e.g. as a function of latitude, local time and geomagnetic activity. The comparison of IRO data with corresponding IRI data indicates that IRI generally overestimates the upper part of the ionosphere whereas it underestimates the lower part of the ionosphere under high solar activity conditions. In a first order correction this systematic deviation could be compensated by introducing a height dependence correction factor in IRI profiling.

Document Type:Article
Additional Information: LIDO-Berichtsjahr=2004,
Title:Comparison of ionospheric radio occultation CHAMP data with IRI 2001
Authors:
AuthorsInstitution or Email of Authors
Jakowski, N.UNSPECIFIED
Tsybulya, K.UNSPECIFIED
Date:2004
Journal or Publication Title:Advances in Radio Science, Kleinheubacher Berichte 2003
Refereed publication:Yes
In ISI Web of Science:No
Volume:2
Page Range:pp. 275-279
Status:Published
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 21:38

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