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General :
Observations :
Operations :

 
Procedure :
 Calibration of the Focus Pyramid 
Author :
  SOFI team
Release :
  12/09/99 : update 
 06/01/99 : creation
 

The calibration of the focus pyramid should be done during a clear night with stable seeing, every three months. The calibration is done in the large field and with the Ks filter.

  • Find an isolated star with a magnitude between 12 and 13.
  • Run the template SOFI_img_tec_FocusWedgeCalibration.obd from the directory /data/SOFI/SYSTEM/COMMON/OBS/CALIB. This template produces a file called SOFI_img_cal_FocusWedgeCalibration.dat.

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