# Solar Wind Utility

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### Contents:

- Overview
- Inputs
- Outputs
- Bugs/Caveats
- Other MPE/ISSI PlugIns

### Overview

This PlugIn calculates various useful solar wind parameters such as energy input, dynamic pressure and magnetopause standoff distance. Note that data from the ISTP ACE mission has a faulty Frame attribute. Edit this manually or set to vector>gse_xyz.

### Input data

Required inputs are :
- B-imf - vector time series with IMF maqgnetic field
- solar wind bulk velocity - vector time series
- plasma desity - scalar time series or constant
- time interval
- time shift - optional time shift

### Outputs

Output quantities are:
- solar wind bulk speed - shifted version of input plasma velocity
- epsilon - the Akasofu Epsilon parameter - input energy to the magnetosphere
- energy - accumulated input energy - epsilon integrated over time
- pdyn - solar wind dynamic pressure
- Rst - magnetopaus standoff distance - approximate distance to magnetopause subsolar point

### Bugs/Caveats

Note that ACE data has empty Frame attribute in the CFD files. Edit manually.

### Other MPE/ISSI PlugIns

- Generic residue analysis of conservation laws
- Vector calculator/ Curlometer
- DeHoffmann-Teller analysis
- Solar wind utility. Calculates IMF clock angle, energy input, dynamic pressure etc.
- EDI filter utility
- Separate plasma velocity into paralell and perpendicular components
- Plasma calculator. Calculates plasma beta, magnetic pressure, resistivity inertial lengths etc.
- Modify, mask and manipulate components of a vector
- Construct a matrix time series from scalar time series
- Four Spacecraft boundary normal, thickness and velocity

SEH, 13 Jan, 2004