Compressed Sensing in Astronomy

The spatial infrared astronomical satellite Herschel, launched on May 14 2009, is the first satellite which has a compressed sensing (CS) coder included in its on board software. We will present our motivations for using Compressed Sensing in this project. Then we will describe the practical implementation of our CS coder/decoder. We will show from simulations that CS enables to recover data with a spatial resolution enhanced up to 30\% with similar sensitivity compared to the averaging technique proposed by ESA, and we will present preliminary results relative to the CS performances on real Herschel data. Finally we will show how other problems in astronomy such interferometric image deconvolution or gammay ray image reconstruction can be also handled differently using CS.

Jean-Luc Starck, CEA/Saclay, France

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