20170113

On-sky engineering:

CWFS+WFS Loop Control Tests

• Make sure your stack is pretty good (RSE < 250)
• Make sure GROC is pretty well set
• Select a 11th mag target near the start of the track for all probes and targetted on IHMP using shuffle and shuffle_config_matt4
• Setup on IHMP
• Center up both guide probes and start guiding on one of the guiders
• Set Exposure times for CWFS, WFS1 and WFS2 to about 5 seconds to assist in centering.
• Offset to CWFS using syscmd -T 'offset_trajectory(dx_ang=-5.5, dy_ang=0.0, adjust_probes="true")'
• Tweak up the position on the IHMP using further offset_trajectory commands.
• Center up both WFS using mgp -grid or mgp -poff. See mgp --help. This requires "Process Images" to be checked.
• Null out focus on WFS1. NOTE: WFS1 seems to perform better than WFS2 at the edges of the track
• Start metrology loop and Activate the loop on WFS1.
• As per normal please have the loops active for WFS2, CWFS even through they are not closed
• Increase the exposure time for the CWFS, WFS1 and WFS2 to greater than 20 seconds for data taking but do not saturate.
• Hit "store images" and "Start Metrology Loop" for GC1, GC2, WFS1, WFS2, TT, CWFS, DMI (although there are no images for DMI)
• Monitor the WFS1 and WFS2 to make sure the X and Y positions do not exceed 1.5". If they do then make a correction.
• Run until the end of the track.

Repeat test: choosing a new star at the next Az in the list: 180, 234, 292.

• For each test, please note the star and end time.

Magnitude limits for CWFS, OWFS1 and OWFS2

Purpose: This is to come up with the minimum star magnitudes and optimal exposure time ranges for each wfs.

• Must be clear for this test
• Select a star of known magnitudes (preferably from the SDSS catalog or at least in a SDSS field
• run do_shuffle on the field and see what magnitudes have been selected for the WFS1 and WFS2.
• record the RA and DEC for the OWFS probes.
• look at the shout.probestars and report those stars and magnitudes (I think there should be 5 magnitudes for viable SDSS fields).
• setup on the field on the CWFS and WFS as done in the previous tests.
• near the center of the track please save images with CWFS and WFS with exposures of at least 15 seconds but not saturated.

Repeat this test with several stars with different SDSS CWFS target magnitudes (11th, 12th etc)

Characterize LRS2-B to LRS2-R offsets

• Start a trajectory
• setup on ACAM and one guide probe at the LRS2-B location.
• offset from LRS2-B to LRS2-R using: B2R: syscmd -T 'offset_trajectory(dx_ang=-103, dy_ang=+3, adjust_probes="true")'
  • Guider should stay in Active mode
  • Allow guider to catch the star and drag to the final position
• once the guider has settled to position measure the position on ACAM and report in the RA report.
• have the TO center the object on the LRS2-R and set new guider fiducial.
• offset from LRS2-R to LRS2-B using: R2B: syscmd -T 'offset_trajectory(dx_ang=103, dy_ang=-3, adjust_probes="true")'
  • Guider should stay in Active mode
  • Allow guider to catch the star and drag to the final position
• once the guider has settled to position measure the position on ACAM and report in the RA report.

Repeat this test 5 times.

Closed dome or cloudy tests

Full set of Cals to test CAMRA

Purpose: We have a new CAMRA software and need to run it through its paces. IT requires full sets of cals including sky flats.

• Take LRS2 sky flats as per normal but only a single VIRUS sky flat is required not the special cals.
• Take a full set of cals for LRS2 and VIRUS
• Take 3 six minute darks for both LRS2 and VIRUS