Prediction filters for the Dst index and the polar cap potentialThe technique of linear prediction filtering is used to create filters relating solar wind parameters to the Dst index and to the polar cap potential. The square root of solar wind dynamic pressure and the solar wind electric field together are found to account for nearly 70 percent of the Dst variance. The prediction filter for the polar cap potential requires the square of the solar wind velocity and the solar wind electric field as inputs. The results suggest that both polar cap potential and ring current injection are primarily controlled by the solar wind, and that substorm expansions do not play a major role in ring current injection.
Document ID
19870052831
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Fay, R. A. (California Univ. Los Angeles, CA, United States)
Garrity, C. R. (California Univ. Los Angeles, CA, United States)
Mcpherron, R. L. (California Univ. Los Angeles, CA, United States)
Bargatze, L. F. (California, University Los Angeles, United States)