Table of Contents ECSS Model Page
Background Information Miscellaneous models
Trapped particle models

This implementation of the trapped radiation models applies them on a grid of magnetic coordinates: the first coordinate is McIlwain's L, the second coordinate is either B, B/B0, or the equatorial pitch angle. Another application is available to evaluate the trapped particle models over a geographic coordinate grid.

The input parameters and options for the models are described below. When the input forms have been completed, pressing the button will start the calculation and bring up the "Results" page.

Model parameters

Model selection

Selecting a model in this application consists of selecting a particle type and one of the models (and model versions if applicable) available for that particle.


The trapped particle fluxes can be calculated as an energy spectrum for one pair of magnetic coordinates or for a single energy for a range of magnetic coordinates. With the second option, the user has the choice between varying L and keeping the second coordinate fixed, or varying the second coordinate while keeping L fixed.

The magnetic coordinates of the starting point are specified by a value of McIlwain's L and a value for one other magnetic coordinate. The coordinate range is defined by specifying the last value in the range and the increments between the first and last value (with a fixed step size, or with a fixed number of values, with linear or logarithmic spacing).


The trapped radiation models produce 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_tbp.html contains the input parameters and summary tables. The spenvis_tbo.txt file contains particle fluxes and magnetic coordinates for each grid point.

Output files generated by the trapped radiation models
File name Description
spenvis_tbp.html Report file
spenvis_tbo.txt Particle fluxes and magnetic coordinates

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

Last update: Mon, 12 Mar 2018