Trapped Electron Model 2 (TEM-2)
Abstract
We present a next-generation radiation specification for the electron radiation belts. The specification includes an empirical model of the statistical variation and spatiotemporal covariation of electron fluxes from 40 keV to 10 MeV in the inner and outer zones, as well as a dynamic full solar-cycle reanalysis, which provides a global snapshot of the electron fluxes every 6 hours from 1992 to 2008. The statistical model is derived from data taken by the S3-3, CRRES, Polar, and SCATHA spacecraft. The reanalysis is driven with data from HEO-l, HEO-3, ICO, and SAMPEX. We validate the reanalysis by comparing a test reanalysis without ICO data to actual ICO observations. The statistical model alone can demonstrate Monte Carlo characterization of uncertainties in radiation specifications for internal charging and total ionizing dose due to electrons. The reanalysis can demonstrate engineering applications, such as a "standard solar cycle" for spacecraft design, as well as scientific applications, such as solar wind correlation studies, initial and boundary conditions for numerical simulations, and principal component analysis. We demonstrate application of the model to radiation specifications and to principal component analysis of the electron belts. Due to the prototype nature of the model, it is insufficiently accurate for definitive conclusions to quantitative investigations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 25, 2010
- Accession Number
- ADA559386
Entities
People
- Paul O'Brien
- Timothy B Guild
Organizations
- The Aerospace Corporation