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: http://www.stsci.edu/documents/dhb/web/c30_wfpc2calib.fm1.html
Дата изменения: Tue Nov 18 00:20:32 1997 Дата индексирования: Sat Dec 22 16:12:46 2007 Кодировка: Поисковые слова: galaxy cluster |
The values of the calibration switches in the headers of the raw and calibrated data indicate what calibration steps the pipeline applied to the data and which calibration reference files were used. Calibration switches will have the value PERFORM, OMIT, or COMPLETE, depending on whether the step has yet to be performed, is not performed during the processing of this dataset, or was completed. For convenience, these keywords are reported in the dataset information page of the new-style paper products.
There are history records at the bottom of the header file of the calibrated data (as
well as the calibration reference file headers). These history records sometimes
contain important information regarding the reference files used to calibrate the
data in the pipeline.
The flow chart below summarizes the sequence of calibration steps performed by calwp2, including the input calibration reference files and tables, and the output data files from each step. The purpose of each calibration step is briefly described in the accompanying table; a more detailed explanation is provided in the following section.Figure 26.2: Pipeline Processing by calwp2
Calibration Steps and -Reference Files Used for WFPC2 -Pipeline
-Processing