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: http://xmm.vilspa.esa.es/calibration/documentation/CALHB/node865.html
Дата изменения: Tue Sep 20 19:45:21 2011 Дата индексирования: Mon Apr 11 03:32:50 2016 Кодировка: |
As the RGS is a dispersive instrument, where the wavelength of an event is determined by the position at which it strikes the detector following grating reflection, accurate knowledge of the instrumental geometry is fundamental. Grating geometry is held in header keywords; and the geometry of individual CCD detectors in the binary table.