Augsburg/ULF
From ViRBO
Contents |
1. Summary
Various geomagnetic indices (Kp, AE, Dst, SYM-H, PC) and averaged solar wind/IMF parameters quantify the energy supply in certain regions of the solar wind-magnetosphere-ionosphere system, and are used as primary tools in statistical studies of solar-terrestrial relationships. However, these indices characterize the steady-state level of the electrodynamics of the near-Earth environment. The turbulent character of solar wind drivers and the existence of natural MHD waveguides and resonators in the magnetospheric plasma in the ULF frequency range (~2-10 mHz) ensures a quasi-periodic magnetic field response to forcing at the boundary layers. Therefore, much of the turbulent nature of plasma processes of solar wind-magnetosphere-ionosphere interactions can be monitored with ground-based or space observations in the ULF frequency range. We have constructed a new index, coined a “ULF wave index,” characterizing the turbulent character of the energy transfer from the solar wind into the upper atmosphere and the short-scale variability of near-Earth electromagnetic processes. We suppose that a wide range of space physics studies will benefit from the introduction of this new index. (From [1])
2. SPASE
3. Research
- This index is described in Kozyrev et al., 2007 [2]
- More documents and presentations are available at [3]
4. Data
4.1. Merged Plots and Files
- All data merged into a single file(?): http://virbo.org/ftp/Augsburg/ULF/merged
- Notes on timestamps.
4.2. Files
Individual data files: ftp://yspace.augsburg.edu/ftp/MACCS/ULF_Index/
4.3. Updates and Revision Notes
- Initial file creation on 06/23/2008.
- Added missing Timf variable on 11/17/2008.
- To improve access speed, data are derived from cache of original data source on December 1, 2008. See Notes#Versioning for more information about versioning and caching.
5. Acknowledgment
- The MACCS project. See ftp://yspace.augsburg.edu/ftp/MACCS/ULF_Index/_Index_readme
- Cite: Kozyrev et al., 2007
- Contact: Mark Engebretseon