Changes between Version 6 and Version 7 of docs/CommissioningPlan/P3.14


Ignore:
Timestamp:
01/14/22 19:01:14 (3 years ago)
Author:
kradhakrishnan
Comment:

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  • docs/CommissioningPlan/P3.14

    v6 v7  
    1  == P3.14        Sky background ==
    2 •       **Phase**               :       3 
    3 •       **Status**              :       Draft   
    4 •       **Category**            :       Nighttime testing (functionality and operability) (C5) + Nighttime calibration (C6)
    5 •       **Recurrence**  :       once at commissioning and then on request.
    6 •       **Duration**            :       2 hours
     1== P3.14        Star center Fourier mode images ==
     2 
     3- **Phase**             :       3 
     4- **Status**            :       Draft   
     5- **Category**  :       Nighttime testing (functionality and operability) (C5) + Nighttime calibration (C6)
     6- **Recurrence**        :       once after instrument installation at telescope platform
     7- **Duration**  :       8 hours
     8
    79**Description**
    8 •       Acquire a series of sky backgrounds from science images, expected mainly when observing extended objects. A short sky background may also be useful for remaining deviant pixel removal.
     10- This calibration is performed to calibrate the target star center to the detector in order to provide a reference input for frame derotation and quadrant combination.
     11
    912**Prerequisites**
    10 •       Authorize SHARK-NIR on the SX side.
    11 •       Atmospheric conditions: AO working conditions???
     13- Authorize SHARK-NIR on the SX side.
     14- Atmospheric conditions: AO working conditions.
     15- Bad pixel map, Dark
     16
    1217**Procedure**
    13 •       Observe a blank field close to the science target (separation~10-20 arcsec)
    14 •       The same set-up as normal science observations but AO is not running and coronagraph may be removed. A list of telescope offsets is added to reach an “empty” field and jitter.
     18- DM produce a pattern offset with four spots symmetric with respect to the star + AO closed-loop + coronagraph
     19- The corresponding image's required specifications 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.
     20- 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.
     21
     22**Templates*
     23
    1524**Success criteria**
    16 •       10% accuracy (dependent on measurement frequency)
     25- Accuracy of 3 mas (goal 1 mas)
     26
    1727**Notes**
    18 •       Same as activity 7.6 in AD4
     28- Same as activity 7.8 in AD4
     29
    1930**LBTO support**
    20 
    21 **Associated SHARK-NIR personnel**
     31- AO support
    2232
    2333**Date performed and by whom**