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Paper: On-Board Supercomputing for NGST and NASA's Remote Exploration and Experimentation Project
Volume: 216, Astronomical Data Analysis Software and Systems IX
Page: 311
Authors: Nieto-Santisteban, M. A.; Hanisch, R. J.; Offenberg, J. D.; Fixsen, D. J.; Sengupta, R.; Mather, J. C.
Abstract: The Next Generation Space Telescope (NGST) is one of the applications selected by the Remote Exploration and Experimentation (REE) project as a candidate to demonstrate the benefit of having on-board supercomputing power. The REE capabilities would improve NGST science by enabling on-board data processing that would allow much more efficient use of the limited downlink bandwidth. Specifically, the NGST Image Processing Group (IPG) is developing cosmic ray rejection and data compression algorithms for parallel processors. Real-time cosmic ray rejection would enable us to reduce the downlink data volume by as much as two orders of magnitude by combining multiple read-outs on the spacecraft rather than downlinking them separately. The combined read-outs can be further reduced in size by applying either lossy or lossless data compression algorithms. This paper describes these algorithms, their implementation and optimization for a parallel, fault-tolerant computing environment, and their relationship with the REE project.
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