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Observation of Ionospheric Effects in the Aurora Zone using CHAMP and COSMIC/Formosat-3 Data

Mayer, Christoph and Jakowski, Norbert (2007) Observation of Ionospheric Effects in the Aurora Zone using CHAMP and COSMIC/Formosat-3 Data. EISCAT Workshop 2007, 2007-08-06 -- 2007-08-10, Mariehamn, Åland Islands, Finland.

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We present observations of the auroral ionosphere combining radio occultation data from the CHAMP and from the COSMIC/Formosat-3 satellite missions. The CHAMP radio occultation measurements with about 150 vertical electron density profiles per day enables us to study solar-cycle dependencies since the beginning of observations in April 2001. With more than 2500 profiles per day the COSMIC/Formosat-3 offers an unprecedented temporal and spatial data coverage.since April 2006. The developed algorithms for analyzing the shape of the vertical electron density profiles up to 800km height fit an empirical Ansatz to the data. This approach consists of Chapman functions for the E- and F-layers and of an exponential decay for the topside. Using this technique, we select profiles with pronounced ionization at E-Layer height in the range of about 90-150 km for studying the geophysical conditions and characteristics of the related ionospheric processes. In particular we show that profiles with enhanced E-layer ionization are closely related to the location and shape of the auroral zone. Thus, we are able to study the local-time, seasonal, and space-weather dependence of enhanced ionization prozesses in the auroral zone, e.g. related electron precipitation processes of magnetospheric origin. Furthermore, we present a statistical analysis of the F-layer parameters and the plasmasphere scale height at 600-800 km height for both auroral zones.

Item URL in elib:https://elib.dlr.de/48136/
Document Type:Conference or Workshop Item (Speech)
Title:Observation of Ionospheric Effects in the Aurora Zone using CHAMP and COSMIC/Formosat-3 Data
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Date:August 2007
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:ionosphere, GPS, CHAMP, COSMIC/Formosat-3, E-Layer, high latitudes
Event Title:EISCAT Workshop 2007
Event Location:Mariehamn, Åland Islands, Finland
Event Type:international Conference
Event Dates:2007-08-06 -- 2007-08-10
Organizer:Dept of Physical Sciences, University of Oulu and Sodankylä Geophysical Observatory
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):W - Vorhaben Ionosphärenerkundung (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Communication and Navigation > Navigation
Deposited By: Mayer, Dr. Christoph
Deposited On:10 Jan 2008
Last Modified:27 Apr 2009 13:43

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