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

Model parameters

The number of debris particles in orbit around the Earth increases with time. This effect is modelled by means of two parameters: the growth rate of the mass in orbit and the fragment growth rate with respect to the year 1988.

The debris population also depends on the solar radio flux F_10.7 for the year preceding the epoch.

The NASA90 model gives debris fluxes as a function of debris diameter. For a given particle density, there is a one-to-one correspondence between mass and diameter (the particles are considered to be spherical). The particle size range can be entered as a diameter range or a mass range.

Results

The report file spenvis_nap.html contains the input parameters and summary tables. The output file spenvis_nao.txt contains the particle fluxes as a function of mass and diameter.

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.