wiki:docs/CommissioningPlan/P2.7

Version 16 (modified by elcarolo, 3 years ago) (diff)

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P2.7 Star center Fourier mode images

  • Phase : 2
  • Status : Draft
  • Category : Daytime testing (functionality and operability) (C3) + Daytime calibration (C4)
  • Recurrence : once after instrument installation at telescope platform
  • Duration : 2 days

Description

  • 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.

Prerequisites

  • Authorize SHARK-NIR on the SX side.
  • Atmospheric conditions: AO working conditions.
  • Bad pixel map, Dark

Procedure

  • DM produce a pattern offset with four spots symmetric with respect to the star + AO closed-loop + coronagraph
  • 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.
  • 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.

Templates

  • SHARKNIR_gen_cal_StarCenter (not released)

Success criteria

  • Accuracy of 3 mas (goal 1 mas)

Notes

  • Same as activity 7.8 in AD4

LBTO support

  • AO support

Date performed and by whom