Changes between Version 8 and Version 9 of NightOperations/SciencePlans/20220713


Ignore:
Timestamp:
May 26, 2023 5:34:39 PM (12 months ago)
Author:
stevenj
Comment:

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  • NightOperations/SciencePlans/20220713

    v8 v9  
    1 = 20230526 =
     1= 20220713 =
    22
    33
    4 == Guider offset (/plate scale) test at different declinations ==
     4== Par-focal test between BIB, guiders, and wavefront sensors ==
    55
    6 //After noticing that the same commanded HETDEX dither results in different sizes of dithers at low and high declinations, we want to characterize this apparent behavior and try to understand how to fix it (and possibly remove or add a cos(Dec) term as necessary).//
     6//In order to better characterize the contributions to Delivered Image Quality and to quantify possible systematic differences in our IQ measurements, we need to measure the focal points of different probes/cameras and determine how par-focal they are. This information is also used by the wavefront sensor pipeline to keep the telescope in the best possible focus.//
    77
    88This test should be attempted when the following conditions are met:
    9   1. Moon up, no Pr1-2 targets in the queue
     9  1. It has been at least a week since the last test
    1010  2. Stable conditions, <2" DIQ without large variations
    11   3. Relatively fresh stack (no need to stack specially for this), with tRSE<150
     11  3. Pr4 targets in the queue (presumably bright time)
     12  4. Relatively fresh stack (no need to stack specially for this), with tRSE<150
    1213
    13 If it looks like you can do it soon, plan ahead and run {{{target_setup}}} in advance to run shuffle on each star of your choosing. Each test should take about 15 minutes to execute.
    14 
    15 This table includes the declination ranges we have successfully targeted and those which still need observations:
    16 -10 to 0
    17 0 to +10
    18 +10 to +20
    19 +20 to +30
    20 +30 to +40
    21 +40 to +50
    22 +50 to +60
    23 +60 to +70
    24 
     14If it looks like you can do it, plan ahead and run {{{target_setup}}} in advance to run shuffle on the star of your choosing. Note that it will take only a few minutes to run the script once the setup is completed.
    2515
    2616== Procedure ==
    2717
    28    0. Pick a target in the "!GalPoint" catalog on htopx, run target_setup on Zeus for this target on the center of the IHMP position (IFU=000) like this:
     18   0. Pick a 12th magnitude star from the "focus12" catalog in htopx, run target_setup on Zeus for this target on the BIB (IFU=555). like this:
    2919{{{
    30 [stevenj@zeus ~]$ target_setup 26 W -ifu 000 -cat gp -to
     20[stevenj@zeus ~]$ target_setup 47128 E -ifu 555 -cat f12 -to
    3121}}}
    3222
    33    1. {{{go_next}}} on this target with the usual setup commands.
     23   1. About 10-15 min before transit, go_next on this target with the usual commands from target_setup.
    3424
    35    2. Keep the ACQ camera running *AT ALL TIMES*. Use SDSS g` filters on ACQ and Guiders.
     25   2. Ask the TO to set up on this target on the BIB, guide on the BIB, handshake to a guider (using g` filters), activate a WFS and allow to stabilize for about 3 minutes while storing images.
    3626
    37    3. Ask the TO to:
    38       a. set up on the fake ACQ camera image with any star marked
    39       b. carefully center the guide star in the guider
    40       c. handshake to a Guider
    41       d. activate a WFS
    42       e. Keep the ACQ camera running and storing images throughout!
     27   ''Be sure the star is NOT saturating on the BIB camera - it will require a short exposure (perhaps 0.1 seconds?)''
    4328
    44    4. Wait 3 minutes after WFS activation for focus to settle.
     29   3. Run this bash script on Zeus and do not change anything in TCS while it runs:
     30{{{
     31/data1/archive/users/stevenj/run_parfocal_test_bib_gc_wfs_11point.sh
     32}}}
     33   which will:
    4534
    46 The remaining steps assume the Guider exposure time is 5 seconds. Note that while Guider 1 is not functional this test must be performed on Guider 2.
     35      a) write information to a log file called {{{focus_curve_bib_gc_wfs.log}}}
    4736
    48    5. Run the script located at:
     37      b) offset focus by -0.25mm
    4938
    50 {{{ /data1/archive/users/stevenj/run_gc2_offset_test.sh }}}
     39      c) deactivate wavefront sensing so they do not interfere (leaves guider running, to avoid drift! but it won't guide since we just get single exposures on cycling)
    5140
    52    it will offset the Guider2 fiducial as described
    53       a. offset guider fiducial by dX,dY= -2.5, 2.5 arcsec, wait 1 minute
    54       b. offset guider fiducial by dX,dY=  5.0, 0.0 arcsec, wait 1 minute
    55       c. offset guider fiducial by dX,dY=  0.0,-5.0 arcsec, wait 1 minute
    56       d. offset guider fiducial by dX,dY= -5.0, 0.0 arcsec, wait 1 minute
    57       e. offset guider fiducial by dX,dY=  2.5, 2.5 arcsec, wait 1 minute
     41      d) cycle the GC1/GC2/WFS1/WFS2/BIB pipelines then offset focus by +0.05mm (repeats 10x until the total focus offset is +0.50mm)
    5842
    59    6. Test is complete, resume science observations.
     43      e) offset focus by -0.25mm (should return to original focus when the script started)
    6044
     45      f) close the PFIP shutter (leaves the pipelines all stopped)
     46
     47      g) beep to indicate the script is finished
     48
     49
     50   4. Return to science observations. Email SJ the log file: {{{focus_curve_bib_gc_wfs.log}}}