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Monitoring and Forecasting Space Weather in Geospace EnvironmentFor improving the reliability of Space Weather prediction, we developed a new, Polar Magnetic (PM) index of geomagnetic activity, which shows high correlation with both upstream solar wind data and related events in the magnetosphere and ionosphere. Similarly to the existing polar cap PC index, the new PM index was computed from data from two near-pole geomagnetic observatories; however, the method for computing the PM index is different. The high correlation of the PM index with both solar wind data and events in Geospace environment makes possible to improve significantly forecasting geomagnetic disturbances and such important parameters as the cross-polar-cap voltage and global Joule heating, which play an important role in the development of geomagnetic, ionospheric and thermospheric disturbances. We tested the PM index for 10-year period (1995-2004). The correlation between PM index and upstream solar wind data for these years is very high (the average correlation coefficient R approximately equal to 0.86). The PM index also shows the high correlation with the cross-polar-cap voltage and hemispheric Joule heating (the correlation coefficient between the actual and predicted values of these parameters approximately equal to 0.9), which results in significant increasing the prediction reliability of these parameters. Using the PM index of geomagnetic activity provides a significant increase in the forecasting reliability of geomagnetic disturbances and related events in Geospace environment. The PM index may be also used as an important input parameter in modeling ionospheric, magnetospheric, and thermospheric processes.
Document ID
20080031483
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Lyatsky, Wladislaw
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Khazanov, George V.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 24, 2013
Publication Date
April 29, 2008
Subject Category
Lunar And Planetary Science And Exploration
Meeting Information
Meeting: Space Weather Workshop
Location: Colorado
Country: United States
Start Date: April 29, 2008
End Date: May 2, 2008
Sponsors: NASA Headquarters, University Corp. for Atmospheric Research, National Oceanic and Atmospheric Administration
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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