The purpose of the project is to calculate particle spectra and radiation doses on-board satellites at low-Earth
Calculations are based on proton spectra obtained from geosynchronous satellite measurements of energetic particle
fluxes. Spectrum polinomial approximation was used to reproduce the proton fluxes. Vertical cutoff rigidity at a
given point at the orbit of low-altitude satellite is calculated by R. Nymmik model, dependent on Kp-index of
Transmittance function can be also calculated as a probability to "meet " the particles of a given rigidity during
the next two passes of LEO satellite around the Earth.