Data assimilation of LANL satellite data into the Salammbô electron code over a complete solar cycle by direct insertion

Abstract

Past work of data reanalysis using the Salammbô three-dimensional code and LANL satellite data was done on a magnetic storm timescale. Here, we focus on the solar cycle timescale reanalysis. We study the accuracy of the reconstitution of the electron radiation belts from 1990 to 2005 using data from Los Alamos instruments on GPS and GEO spacecrafts. First, we simulate the 9 October 1990 storm. By predicting fluxes at CRRES orbit, we estimate a confidence level and propose quantitative limitations on the current state of the art for chorus wave-particle interaction modeling. By performing a run covering 15 a, we have been able to distinguish dynamics of different timescales and compare and validate our results with the statistical radiation belt models AE-8 and CRRESELE. The main conclusion is that the history of the radiation belts is of prime importance in order to best fit their real state. Data reanalysis is a new and valuable way to describe them.