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| Paper: |
The HERSCHEL/PACS Early Data Products |
| Volume: |
351, Astronomical Data Analysis Software and Systems XV |
| Page: |
524 |
| Authors: |
Wieprecht, E.; Wetzstein, M.; Huygen, R.; Vandenbussche, B.; de Meester, W. |
| Abstract: |
ESA's Herschel Space Observatory to be launched in 2007, is the first space observatory covering the full far-infrared and submillimeter wavelength range (60 - 670 microns).
The Photodetector Array Camera & Spectrometer (PACS) is one of the three science instruments. It contains two Ge:Ga photoconductor arrays and two bolometer arrays to perform imaging line spectroscopy and imaging photometry in the 60 - 210 micron wavelength band.
The HERSCHEL ground segment (Herschel Common Science System - HCSS) is implemented using JAVA technology and written in a common effort by the HERSCHEL Science Center and the three instrument teams. The PACS Common Software System (PCSS) is based on the HCSS and used for the online and offline analysis of PACS data.
For telemetry bandwidth reasons PACS science data are partially processed on board, compressed, cut into telemetry packets and transmitted to the ground. These steps are instrument mode dependent.
We will present the software model which allows to reverse the discrete on board processing steps and evaluate the data.
After decompression and reconstruction the detector data and instrument status information are organized in two main PACS Products.
The design of these JAVA classes considers the individual sampling rates, data formats, memory and performance optimization aspects and comfortable user interfaces. |
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