Observing Plan for the February 12-13 2014 Engineering Nights¶
Proposal Id: 2013A-9999
Exposure Scripts: Most of the exposure script for this night are available in ~DECamObserver/ExposureScripts/engineering_20140212
(from the Observer Console GUI select Exposure Control --> Load Exposure Script --> Choose File)
Alistair will be observing
Adjustment of LN2 lines 1s and 1r to fix the thermal shorts¶
Parallel activity at lower priority - test cage covers¶
AC Installation (continuing activity independent of the engineering run)¶
Possible rebooting of the SISPI computers¶
Full set of zeros and dome flats
Script: prenight_calibration.json (note that this is a (standard) DES script. From the the Observer Console GUI select Exposure Control --> Load Exposure Script --> Select DECam Script then choose DES/prenight_calibration.json in the dialog window)
Guider, Guider Feedback¶
Adjusting Guider Feedback¶
The system now supports separate values for the guider feedback percentage in HA and dec. The default is 10% for both axes. The default values can be changed in the .ini file.
Use the Architect Console to adjust these values at run time:
- On the Architect Console GUI select the Guider role (it's running on readout2)
- Use these commands:
- get tcs_feedback returns the current values (first number is HA, second is dec
- get ha_feedback returns the current value of the HA feedback (in %)
- get dec_feedback returns the current value of the dec feedback (in %)
- set ha_feedback=8 sets the HA feedback to 8%
- set dec_feedback=5 sets the dec feedback to 5%
Note: Configure (and of course restart) restores the default values.
The script file is guider-on-off-90s-50.json. This takes 50 z band 90s exposures so takes about 1.6 hours
(i) feedback 0.1, 0.05 (ii) 0.1, 0.1 (iii) 0.1, 0.075, (iv) 0.1, 0.0375. Also want to repeat (i) with a single guide starm and a set with 300s exposures.
AOS/Donut Data (Roodman)¶
This study will provide high spatial resolution for wavefront studies.
100 dithered 30 second i-band exposures will be collected at around 20 degrees from the galactic plane and as close to zenith as possible. Here is sample of the maximum desired donut density.
A rough look at the sky position for February indicate that the galaxy is best viewed prior to midnight local time. It is available all night.
- Have telops manually slew telescope to 20 degrees from the galactic plane and as close to zenith as possible.
- Load script aos_dense_dither_i.json from the engineering directory. (a 'z' band script also exists if extra time is available).
- Disable the hexapod look-up-table LUT (if you have trouble with this step: please skip it and proceed to next step)
- Go to the architect console
- Scroll to the computer ics1
- Click on LUT
- Below SYSTEM CONTROL on the top right of screen you will see three input boxes. First two both contain LUT LUT
- In third box type "set use_table no" (without quotes) and press enter
- Press GO in observer console to run the script (the first exposure will defocus the camera, the last will refocus the camera).
- Relax for a while
Omega Cen. Script is linearity_omegacen.hjson. Near the end of the night.