Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/instrument-news/handbooks/nicmos/c14_calplan.doc3.html
Дата изменения: Thu Aug 7 20:42:47 1997
Дата индексирования: Tue Feb 5 12:21:26 2013
Кодировка:
Поисковые слова: столовая гора

[Top] [Prev] [Next] [Bottom]

Thermal Vacuum Test

The NICMOS System Level Thermal Vacuum test program (SLTV) was conducted at Ball Aerospace in three stages between June and December 1996. The primary purpose of this activity was the validation of the operation of the assembled instrument in an environment nearly identical to HST's. This included testing the thermal performance of the instrument, demonstrating proper operation of all commandable operating modes, exercising all mechanisms, and testing safing procedures. It also included characterization of the detector performance (e.g., read noise and dark current). Of particular importance to the overall calibration program, flat fields using the flight optics and detectors were obtained in each filter.

Enough calibrations were obtained from SLTV to provide a partial load of the Calibration Data Base at STScI. These calibrations are available to users (via the HST Data Archive) and are used by STScI in the routine data processing calibration pipeline. Clearly, some of these calibrations will require updating from on-orbit observations before they are of much scientific utility (e.g., the photometric zero points).

The existance of the dewar anomoly described in Chapter 3 was a major factor in the conduct of the SLTV program. Both validation of the extended range PAM mechanism and efforts to limit the stresses within the dewar were accomplished.

[Top] [Prev] [Next] [Bottom]

stevens@stsci.edu