Solar Wind Forecasting with the SOLIS-VSM

Details Solar Wind Forecasting with the SOLIS-VSM Solar Wind Forecasting with the SOLIS-VSM

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsp51b..01r&link_type=abstract

American Geophysical Union, Spring Meeting 2005, abstract #SP51B-01

Physics

2134 Interplanetary Magnetic Fields, 2169 Sources Of The Solar Wind, 7511 Coronal Holes, 7594 Instruments And Techniques

Scientific paper

A web based solar wind forecasting resource applying a simple empirical model with SOLIS-VSM (Vector Spectromagnetograph) data is presented here. The solar wind empirical model uses the locations of coronal holes on the observed solar disk to forecast an estimated solar wind velocity at Earth. The model coefficients are estimated minimizing the difference between 10+ years of coronal hole images and the corresponding measured solar wind velocities. The coronal hole training data set was derived from Kitt Peak Vacuum Telescope (KPVT) He I 1083 nm images and photospheric magnetograms. The model can forecast up to 8.5 days in advance. The VSM estimated coronal hole images are derived from daily full-disk photospheric magnetograms and He I 1083 nm spectroheliograms using an automated coronal hole detection algorithm. Daily solar wind forecasts are planned to be automated using SOLIS-VSM data and made available publicly during the year 2005. The coronal hole data used here was compiled by K. Harvey and F. Recely using National Solar Observatory (NSO) KPVT observations under a grant from the National Science Foundation (NSF). Solar wind data utilized for this project is provided on the Internet at http://nssdc.gsfc.nasa.gov/omniweb/. This work is carried out through the NSO Research Experiences for Undergraduate (REU) site program, which is co-funded by the Department of Defense in partnership with the National Science Foundation REU Program. This research was supported in part by the Office of Naval Research Grant N00014-91-J-1040. The NSO is operated by AURA, Inc. under a cooperative agreement with the NSF.

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