Prediction of nonlinear effect for anisotropy of charged particle pitch angle distribution at geostationary orbit

The new phenomenological model of a dynamics prediction of perpendicular anisotropy index of charged particle pitch angle distribution at geostationary (geosynchronous) orbit (GEO) in the Earth’s magnetosphere, and also in any circular orbit depending on local time LT in an orbit and the geomagnetic activity index is offered. Comparison of model at a qualitative physical level with the numerous experimental data received from 1999 to 2007 is lead. It is proved, that the general analytical dependence of perpendicular anisotropy index of charged particle pitch angle distribution on GEO received as a first approximation can be used (especially for conditions of magnetically quiet time) for quantitative forecasts and comparisons with experimental data on GEO after attraction of corresponding effective cross-sections for charge exchange and Coulomb collisions for electrons, protons and ions. It is received for the offered mathematical model, that half of width of the general analytical dependence on local time LT in an orbit = 6 h LT (when ≈ const, for example, within one day) is constant and not dependent on the 𝐾𝑝-index...