Determining the Accuracy of the USGS Near Real-time Dst as a Driver to External Magnetic Field Models

Details Determining the Accuracy of the USGS Near Real-time Dst as a Driver to External Magnetic Field Models Determining the Accuracy of the USGS Near Real-time Dst as a Driver to External Magnetic Field Models

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa51d1980c&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SA51D-1980

Physics

[7938] Space Weather / Impacts On Humans, [7954] Space Weather / Magnetic Storms, [7959] Space Weather / Models

Scientific paper

In this study, we test the accuracy of external magnetic field models using the USGS near real-time Dst and Kyoto Quicklook as a driver. The usefulness of these models as an operational tool has been limited by the lack of availability of a reliable real-time Dst index. It is difficult to prove the accuracy of any index due to its derived nature and the lack of physical measurables against which to compare. As a proxy for a direct measurement, we evaluate the USGS near real-time Dst index as an operational input to Olson and Pfitzer [1988], Tsyganeko [1996], and Tsyganeko [2001] Storm models. These models are compiled by ONERA-DESP library created by CRATERRE, the French Space Agency. The included magnetic field models use the Dst index as a primary input with solar wind density, velocity, and interplanetary magnetic field, IMF, strength. GOES magnetic field and ground-based data will be used for validation of the resulting magnetic field output from the magnetic field models. The time series used for the analysis is from October 1, 2009 to May 31, 2010. The information will provide an estimate of the accuracy of the operational geosynchronous magnetic field model output driven by the USGS near real-time Dst, as well as provide a foundation for validating the index itself against a measured, physical value.

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