NASA/CR-210072, Armstrong, T.W. and Colborn, B.L., Evaluation of Trapped Radiation Model Uncertainties for Spacecraft Design, NASA's Space Environments and Effects (SEE) Program, Technical Monitor: J.W. Watts, NASA Marshall Space Flight Center, AL 35812, and Science Applications International Corporation (SAIC), 1706 Prospect Road, Prospect, TN 38477, March, 2000, pp. 52, Format(s): PDF 2342k |
The Standard AP8 and AE8 models for predicting trapped proton and electron environments have been compared with several sets of flight data to evaluate model uncertainties. Model comparisons are made with flux, dose and activation measurements made on various U.S. low-Earth orbit satellites(APEX, CRRES,DMSP, LDEF, NOAA) and Space Shuttle flights, on Russian satellites (Photon-8, Cosmos-1887, Cosmos-2044), and on the Russian Mir Space Station. This report gives a summary of the model-data comparisons--detailed results are given in a companion report. Results from the model comparisons with flight data show, for example, the AP8 model underpredicts the trapped proton flux at low altitudes by a factor of about two (independent of proton energy and solar cycle conditions), and that the AE8 model overpredicts the flux in the outer electron belt by an order of magnitude or more
| Keywords: | trapped radiation model uncertainties,ap8,ae8,space radiation,space ionizing radiation environments |
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| Subjects: | Space Sciences: Space Radiation: Solar Radiation and Activity |
| ID Code: | 525 |
| Deposited On: | 30 July 2002 |