Speaker
Description
Under the ESA project Radiation Environment at Extremely Low Latitude and Altitude (RENELLA, ESA Contract No 4000118058/16/NL/LF/hh), a new trapped model has been built for the low altitude region (<1,000 km).
The model flux maps are based on data from the S3-3/PT, AZUR/EI-88, CRRES/PROTEL, SAMPEX/PET and RBSP/REPT/RPS datasets. In addition, PROBA1/SREM data are used to validate the flux maps and routines to derive omnidirectional fluxes. All data were ingested in a local ODI (Open Data interface) instance, which greatly simplified subsequent data processing.
The data were binned in a set of maps using the Kaufmann $K$ and atmospheric density at the lowest mirror point as coordinate axis (one map per energy channel). Magnetic coordinate grids where pre-calculated for every year between 1960 and 2020, from which quadratic fits were derived for the minimum drift shell altitude as a function of $L$ and $I$. The MDAC atmosphere model is used to calculate density at the lowest mirror point, as a function of $F_{10.7}$ (90 and 7 day averages).
A first set of flux maps has been generated to verify the processing and modelling software, to perform a first order validation, and to start the implementation of the final model into the VALIRENE toolkit, SPENVIS and IRBEM.
