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The DREAM Project




About DREAM and the DREAM beta web service

The Dynamic Radiation Environment Assimilation Model (DREAM) was developed at Los Alamos National Laboratory to understand and to predict hazards from the natural space environment and artificial radiation belts produced by high altitude nuclear explosions (HANE) such as Starfish. DREAM was initially developed as a basic research activity to understand and predict the dynamics of the Earth’s radiation belts. It uses Kalman filter techniques to assimilate data from space environment instruments with a physics-based model of the radiation belts. DREAM can assimilate data from a variety of types of instruments and data with various levels of resolution and fidelity by assigning appropriate uncertainties to the observations. Data from any spacecraft orbit can be assimilated but DREAM was originally designed to work with input from the LANL space environment instruments on Geosynchronous and GPS platforms. With those inputs, DREAM can be used to specify the energetic electron environment at any satellite in the outer electron belt whether space environment data are available in those orbits or not. Even with very limited data input and relatively simple physics models, DREAM specifies the space environment in the radiation belts to a high level of accuracy. DREAM is currently being tested and evaluated as we transition from research to operations.

The DREAM beta web service uses a single satellite for data input which is currently GOES (the Geostationary Operational Environmental Satellites). We are grateful to the NOAA Space Weather Prediction Center for making GOES energetic particle data available in real time for general use. LANL-GEO and GPS data are not used in these results. Several artifacts and limitations are primarily the result of this single-satellite input.

The data on these web pages are from the DREAM model run in a very particular and limited configuration that is intended to demonstrate a prototype real time capability. Compared to the full capabilities of DREAM the beta web service contains a variety of compromises and internal inconsistencies that will be described below. The primary objectives for putting this beta version on the web are (1) to develop the computational infrastructure for real-time operations and web-based services, (2) to provide some initial outputs that are available to the space weather community and (3) to solicit your comments and suggestions as we continue the development. This is very much a work in progress and the current outputs should not be used for research or operations.

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