Table of Contents ECSS Model Page
Background Information Radiation sources and effects
Proton anisotropy model


This application transforms trapped proton omnidirectional integral fluxes into orbit-averaged unidirectional integral and differential fluences for a set of look directions. The program can also provide the unidirectional integral and differential fluxes along the orbit of the satellite. Thus, in order to run this application a user must first generate a spacecraft trajectory using the orbit generator and then generate the trapped proton integral fluxes using one of the AP-8 omnidirectional models.

Warning: This application does not work for uploaded trajectories.

The input parameters and options for the trapped proton anisotropy models are described below. When the input form has been completed, pressing the button will start the calculation and bring up the "Results" page.

The button calls up the model selection page for consecutive runs of multiple models. This feature is available for advanced users only.

Warning: using these buttons deletes all existing output from the proton anisotropy models and from any model that uses this output, in order to ensure consistency in the outputs.

Input parameters

Model selection

Users can choose between the Badhwar & Konradi 1990 (MIN/MAX) or Watts et al. 1989 VF1-(MIN/MAX) models. The MIN/MAX option depends on the input for the AP-8 trapped proton model referring to the solar minimum or maximum.


The proton anisotropy 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_anp.html contains the input parameters and a summary table with the number of look directions. The look directions and directional proton fluxes are stored in the spenvis_ano.txt file.

Output files generated by the proton anisotropy models
File name Description
spenvis_anp.html Report file
spenvis_ano.txt Look directions and directional proton fluxes

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.

The button calls up the output page for consecutive runs of multiple models. This button only appears when the proton anisotropy models have been included in the combined model run selection. This feature is available for advanced users only.

Last update: Mon, 12 Mar 2018