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Paper detail

A compression scheme for radio data in high performance computing

We present a procedure for efficiently compressing astronomical radio data for high performance applications. Integrated, post-correlation data are first passed through a nearly lossless rounding step which compares the precision of the data to a generalized and calibration-independent form of the radiometer equation. This allows the precision of the data to be reduced in a way that has an insignificant impact on the data. The newly developed Bitshuffle lossless compression algorithm is subsequently applied. When the algorithm is used in conjunction with the HDF5 library and data format, data produced by the CHIME Pathfinder telescope is compressed to 28% of its original size and decompression throughputs in excess of 1 GB/s are obtained on a single core.

preprint2015arXivOpen access
Kiyoshi MasuiMandana AmiriLiam ConnorMeiling DengMateus FandinoCarolin HöferMark HalpernDavid HannaAdam D. HincksGary HinshawJuan Mena ParraLaura B. NewburghJ. Richard ShawKeith Vanderlinde
astro-ph.IM
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Kiyoshi MasuiMandana AmiriLiam ConnorMeiling DengMateus FandinoCarolin HöferMark HalpernDavid HannaAdam D. HincksGary HinshawJuan Mena ParraLaura B. NewburghJ. Richard ShawKeith Vanderlinde

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