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Modeling of the radiation belt megnetosphere in decisional timeframes

United States Patent

April 23, 2013
View the Complete Patent at the US Patent & Trademark Office
Los Alamos National Laboratory - Visit the Technology Transfer Division Website
Systems and methods for calculating L* in the magnetosphere with essentially the same accuracy as with a physics based model at many times the speed by developing a surrogate trained to be a surrogate for the physics-based model. The trained model can then beneficially process input data falling within the training range of the surrogate model. The surrogate model can be a feedforward neural network and the physics-based model can be the TSK03 model. Operatively, the surrogate model can use parameters on which the physics-based model was based, and/or spatial data for the location where L* is to be calculated. Surrogate models should be provided for each of a plurality of pitch angles. Accordingly, a surrogate model having a closed drift shell can be used from the plurality of models. The feedforward neural network can have a plurality of input-layer units, there being at least one input-layer unit for each physics-based model parameter, a plurality of hidden layer units and at least one output unit for the value of L*.
Koller; Josef (Los Alamos, NM), Reeves; Geoffrey D. (Los Alamos, NM), Friedel; Reiner H. W. (Los Alamos, NM)
Los Alamos National Security, LLC (Los Alamos, NM)
12/ 390,611
February 23, 2009
STATEMENT REGARDING FEDERAL RIGHTS This invention was made with government support under contract number DE-AC52-06NA25396 and cooperative agreement DE-FC26-04NT42113 awarded by the U.S. Department of Energy, and grant N00014-03-1-0652 awarded by the U.S. Office of Naval Research. The government has certain rights in the invention.