NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Investigating Changes in the High-Latitude Topside Ionosphere During Large Magnetic StormsA search was conducted to locate periods of nearly simultaneous solar-wind and high latitude topside-ionospheric data during magnetic storms. The focus was on the 20-yr interval from 1965 to 1985 when both solar-wind and Alouette/ISIS topside-sounder data are potentially available. The search yielded 125 large magnetic storms (minimum Dst less than 100) and 280 moderate magnetic storms (minimum Dst between -60 and -100). Solar wind data were available for most, but not all, of these storms. A search of the available high-latitude topside electron-density Ne(h) profiles available from the National Space Science Data Center (NSSDC), both from manual inspection of 35-mm film ionograms in the 1960s and more recent auto-processing of ISIS-2 topside digital ionograms using the TOPIST software, during 9-day intervals associated with the 125 large magnetic storm minimum Dst times yielded the following results: 31 intervals had 10 or more manual-scaled profiles (21 intervals had more than 100 profiles and 5 of these had more than 1,000 profiles), and 34 intervals had 10 or more TOPIST profiles (2 intervals had more than 100 profiles). In addition, a search of the available Alouette-2, ISIS-1 and ISIS-2 digital ionograms during the above periods has yielded encouraging initial results in that many ISIS-1 ionograms were found for the early time intervals. Future work will include the search for 35-mm film ionograms during selected intervals. This presentation will illustrate the results of this investigation to date.
Document ID
20090038179
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Fainberg, Joseph
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Benson, Robert F.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Osherovich, Vladimir
(Catholic Univ. of America United States)
Truhlik, Vladimir
(Academy of Sciences of the Czech Republic Prague, Czech Republic)
Wang, Yongli
(Maryland Univ. Baltimore County MD, United States)
Fung, Shing
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Bilitza, Dieter
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 24, 2013
Publication Date
December 13, 2009
Subject Category
Meteorology And Climatology
Meeting Information
Meeting: 12228-10-ST 2009 Fall AGU Conference
Location: San Francisco, CA
Country: United States
Start Date: December 13, 2009
End Date: December 19, 2009
Sponsors: American Geophysical Union
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available