Polar Ionospheric Imaging at Storm Time

During periods of major geomagnetic storms the polar ionosphere becomes very variable. Ground-based measurements, such as NIMS, GPS or ionosonde data are too sparse to do tomographic imaging, however, combination of these data sources as well as other available measurements, such as satellitebased d...

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Bibliographic Details
Main Authors: Yin, Ping, Mitchell, Cathryn, Bust, Gary
Other Authors: BATH UNIV (UNITED KINGDOM)
Format: Text
Language:English
Published: 2006
Subjects:
Atmospheric Physics
Meteorology
Geography
*POLAR REGIONS
*GLOBAL POSITIONING SYSTEM
*STORMS
*IONOSPHERIC DISTURBANCES
NATO
EUROPE
MEASUREMENT
TOMOGRAPHY
IONOSONDES
MAGNETIC STORMS
UNITED KINGDOM
GREENLAND
ASSIMILATION
GROUND BASED
IMAGES
ALASKA
ELECTRON DENSITY
SOURCES
IONOSPHERE
FOREIGN REPORTS
NATO FURNISHED
MIDAS (MULTI-INSTRUMENT DATA ANALYSIS SYSTEM)
Greenland
Alaska
Online Access:http://www.dtic.mil/docs/citations/ADA476974
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA476974
Description
Summary:During periods of major geomagnetic storms the polar ionosphere becomes very variable. Ground-based measurements, such as NIMS, GPS or ionosonde data are too sparse to do tomographic imaging, however, combination of these data sources as well as other available measurements, such as satellitebased data, may have the possibility to monitor the structure of the disturbed polar ionosphere. In this paper, LEO-based GPS data onboard CHAMP as well as ground-based GPS and ionosonde observations are input into a four dimensional tomographic algorithm MIDAS (Multi-Instrument Data Analysis System) to image the disturbed ionosphere at Alaska and Greenland as well as over Europe for the major storm in October 2003. In contrast, electron density images produced by another independent method IDA3D (Ionospheric Data Assimilation Three Dimensional), which assimilates primarily NIMS data and other data source, are involved to perform comparisons. A general good agreement can be obtained between them. As a result, the addition of LEO-based GPS data presents a great potential in polar ionospheric imaging. See also ADM002065., The original document contains color images. RTO-MP-IST-056. Polar Ionospheric Imaging at Storm Time. In Characterising the Ionosphere (pp. 3-1 3-12). Meeting Proceedings RTO-MP-IST-056, Paper 3. Neuilly-sur-Seine, France: RTO.

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