PAL: an object oriented data access layer for Herschel data processing

Bo Li (National Astronomical Observatories, Chinese Academy of Sciences; GSegment Space Technologies, Inc), S. Guest (Rutherford Appleton Laboratory, UK), M. Huang (National Astronomical Observatories, Chinese Academy of Sciences), P. Balm (ESA Herschel Science Centre, ESAC, Spain), H. Siddiqui (ESA Herschel Science Centre, ESAC, Spain), J. Bakker (ESA Herschel Science Centre, ESAC, Spain), J. C. Segovia (ESA Herschel Science Centre, ESAC, Spain), J. Saiz (ESA Herschel Science Centre, ESAC, Spain), K. Edwards (SRON Netherlands Institute for Space Research, The Netherlands; University of Waterloo, Canada)


Abstract

The Herschel Space Observatory generates 9TB (Paul Balm 2009) of raw scientific data during its lifetime that are processed into data products of different levels and are stored at geographically distributed locations. The Herschel Ground Segment Product Access Layer (PAL), an object oriented software package that provides a consistent means for accessing these data products, isolates the
complexity of underlying storage systems and makes it possible for scientific data analysis scripts to be reused in different environments and over a long period of time as software and hardware evolve. The design of the PAL also makes it easier for users to handle new underlying storage systems and to optimize performance according to different system characteristics.

Paper ID: P085

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