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Determination of horizontal gradients of ionization over Argentina with differential Doppler measurements

Rios, V.H. and Jakowski, N. and Santillan, M. and Medina, C. (1999) Determination of horizontal gradients of ionization over Argentina with differential Doppler measurements. Advances in Space Research, Vol. 24 (Issue 11), pp. 1613-1617.

Full text not available from this repository.

Abstract

Differential Doppler measurements of signals from US-Navy Navigational System (NNSS) satellites can be used to obtain the electron content of the ionosphere. Measurements carried out using data from four stations on Argentine. Differential Doppler data from two stations are combined, resulting in considerably more reliable results , particularly when there is strong horizontal structure in the ionosphere, as is often the case in the Equatorial and polar regions. Range difference measurements are influenced by differences of electron content or "horizontal gradients", and the role of gradients is demostrated. Unfortunately, the presently available ionospheric models give no realistic indication of horizontal gradients and therefore we have to rely on experience from measurements and one's estimates from atmospheric / ionospheric physics. The availability of observed data is discussed together with the relevance of conclusions from measurements and estimates.

Document Type:Article
Additional Information: LIDO-Berichtsjahr=2000,
Title:Determination of horizontal gradients of ionization over Argentina with differential Doppler measurements
Authors:
AuthorsInstitution or Email of Authors
Rios, V.H.UNSPECIFIED
Jakowski, N.UNSPECIFIED
Santillan, M.UNSPECIFIED
Medina, C.UNSPECIFIED
Date:1999
Journal or Publication Title:Advances in Space Research
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:Vol. 24
Page Range:pp. 1613-1617
Status:Published
Keywords:Ionization, Differential Doppler, Determination, Horizontal Gradients
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 20:42

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