Magnetic Field Models in the SPEDAS GUI
Geomagnetic Field Models
The SPEDAS GUI can be used to generate and trace geomagnetic field models using the IDL Geopack library. The models currently available from the GUI include IGRF as well as the Tsygenenko 89, 96, 01 and 04 models.
The Geopack library must be installed before getting started. Download and install the latest Geopack from http://ampere.jhuapl.edu/code/idl_geopack.html
The magnetic field models panel allows you to:
- calculate the field model at a position (versus time)
- trace the modeled field from a position to the equator (versus time)
- trace the modeled field from a position to the ionosphere (versus time)
Tsyganenko-Sitnov 04 (also known as TS05) model
The Tsyganenko 04 model requires various geomagnetic and interplanetary magnetic field (IMF) data, including:
- IMF By and Bz
- Solar wind proton density
- Solar wind flow speed
- Dst (or Sym-H) index
The TS04 model also requires 6 "W" coefficients, though the Field Models panel in the GUI can be used to calculate the required W coefficients using the IMF data.