Changes between Initial Version and Version 1 of docs/CommissioningPlan/P3.21


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Timestamp:
03/05/20 13:35:23 (5 years ago)
Author:
kradhakrishnan
Comment:

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  • docs/CommissioningPlan/P3.21

    v1 v1  
     1 == P3.21       Star center ==
     2•       **Phase**               :       3 
     3•       **Status**              :       Draft   
     4•       **Category**            :       Nighttime calibration (C5)
     5•       **Recurrence**  :       on every target, starting from commissioning.
     6•       **Duration**            :       20 minutes
     7**Description**
     8•       This calibration is performed to calibrate the target star center with respect to the detector in order to provide a reference input for frame derotation and quadrant combination.
     9**Prerequisites**
     10•       Authorize SHARK-NIR on the SX side.
     11•       Atmospheric conditions: AO working conditions.
     12•       Bad pixel map, Dark
     13**Procedure**
     14•       DM produce a pattern offset with four spots symmetric with respect to the star + AO closed-loop + coronagraph
     15•       The required specifications of the corresponding image are a grid of at least 2x2 regularly spaced focal plane image peaks within 5 and 15 lambda/D with FWHM < 45 mas and separation precision < 6 mas.
     16•       DM offset applied on target acquisition to produce a waffle image. Find the center of the four first-order diffraction peaks (cross geometry) to deduce the pixel corresponding to the center field.
     17**Success criteria**
     18•       Accuracy of 3 mas (goal 1 mas)
     19**Notes**
     20•       Same as activity 7.8 in AD4
     21**LBTO support**
     22•       Support from LBTI/LBTO?
     23**Associated SHARK-NIR personnel**
     24•       JF, LM, MdP
     25**Date performed and by whom**