Документ взят из кэша поисковой машины. Адрес
оригинального документа
: http://www.stsci.edu/documents/dhb/webvol2/c20_wfpc1calib.fm4.html
Дата изменения: Tue Feb 10 20:06:07 1998 Дата индексирования: Sat Dec 22 18:12:54 2007 Кодировка: Поисковые слова: релятивистское движение |
Finding that a calibration reference file has changed since the data were calibrated doesn't always mean that recalibration is necessary. The decision depends very much on which calibration image or table changed, and whether that kind of correction is likely to affect the analysis. Retrieving and comparing the recommended and used calibration files to examine any differences can help in the decision to recalibrate. (The table tools in the STSDAS ttools package can be used to manipulate calibration tables; the images can be manipulated in the same ways as the science data.)