Overview

SPENVIS can run the Divine and Garrett [1983] Jupiter plasma environment model over a spacecraft trajectory. This feature is available for advanced users only.

The DG83 model includes descriptions for the following particle populations in the Jovian magnetic field:

• energetic electrons (>0.06 MeV) and protons (>0.6 MeV);
• intermediate or "warm" energy (500 eV < E < 100 keV) electrons and protons;
• cold multi-species plasma model (<500 eV).

The latter two models have been implemented into the DG83 plasma software now implemented within SPENVIS.

Execution of the DG83 plasma model is very straightforward. Once the spacecraft trajectory has been generated within SPENVIS, or a trajectory file uploaded, pressing the button will start the calculation and bring up the "Results" page. The calculation of the plasma density (as a function of species) and temperature is provided at each step defined for the trajectory within the Jovian magnetosphere.

Results

The DG83 plasma model produces the files listed in the table below. A description of the file formats can be brought up by clicking on their description in the table.

The report file spenvis_jpp.html tabulates the spacecraft position in System III coordinates together with the warm plasma (electron plus proton) density, and the cold plasma densities for electrons, protons, O+, O++, S+, S++, S+++ and Na+. Note that while the temperature of the cold plasma is considered position dependent within the model, the warm plasma DG83 model assumes the temperature is a constant 30 keV. The plasma parameters are also stored in the spenvis_jpo.txt file or use with the plotting tools.

Output files generated by the DG83 plasma model

File name	Description
spenvis_jpp.html	Report file
spenvis_jpo.txt	Plasma parameters along the trajectory

To generate plots, select the plot type(s), options and graphics format, and click the or button. The current page will be updated with the newly generated plot files.