Administrivia
These tasks are to be done prior to the start of observing runs
each month:
- Check conking.
- Log into hqcronserver as
user deimos.
- run conk-check deimos
- Verify that DEIMOS numbered accounts to be used
during the next run have been conk-ed
within the last 21 days.
- If accounts require conking,
manually initiate conking log into
hqcronserver as deimos and run
the following command:
autoconk -f -m m -M M
where m is the first account number to conk and
M is the last.
- Check rebooting.
- Log into deimosserver
as user dmoseng .
- Issue the uptime
command to check how long the computer has been up.
- If more than 7 days, request a reboot from sysadmin.
- Repeat this check for deimosserver2.
- NOTE: if keamano is rebooted, then you must restart
the rotator server process by logging into
deimosserver2 as user kics and executing:
deirot stop
deirot start
then run testAll as user dmoseng
on deimosserver to verify that things are OK.
- Check disk space.
- Log into deimosserver
as user dmoseng.
- run df
- If one of the data disks (1001,1002,1003) is more
than 50% full, we need to clean data from the disk.
- Run datadirs all, check the output, and verify which directories need to be cleaned.
- Confirming with Bob Goodrich which directories have been savier-ed before deleting files.
- Check disk speed. Log into deimosserver
as dmoseng. Check the speed of the disks using the
command
~dmoseng/scripts/run_test_disk_io_speed
Check the logfile in
~dmoseng/log/test_disk_io_speed.log and see
whether current I/O speed is in line with previous values.
If not, then suspect a problem with the DEIMOS RAID array
and seek assistance from sysadmins; this test is completely
independent of the DEIMOS software and simply tests the time
required to write data to disk.
- Check image acquisition sequence speed. Bring up
the DEIMOS software from deimosserver as
dmoseng. Check the speed of the image acquisition
sequence by running the command
~dmoseng/scripts/run_test_goi_time
For each data disk, this will acquire 5 spectral-mode bias
images and compute the time to write to disk. Check the
resulting output in ~dmoseng/log/test_goi_time.log,
which looks like this:
# date disk n erase wcrate wdisk total
2006-Apr-11 19:43 /sdata1001 10 8.44 55.84 1.54 71.35
2006-Apr-11 19:54 /sdata1002 10 8.44 55.90 1.54 71.40
2006-Apr-11 20:06 /sdata1003 10 8.44 55.76 1.48 71.30
Compare the time required to complete various phases to what
it took in the past. If problems are seen, check software
and hardware:
- unusually long erase time may indicate a problem with
the CCD controller or deiccd keyword library
- unusually long wcrate time may indicate a
problem with the CCD controller
- unusually long wdisk time could be a
problem with the gathering of keywords or the
write_image daemons
- abnormally long total time could indicate
a problem with lickserv2
Daytime Checkout
These procedures are run during the day to check whether key
components of the instrument are working as expected.
- Check safety. Phone the summit and verify that
DEIMOS is available for moving motors and rotating.
- Start software. Log into
deimosserver as dmoseng and launch the
instrument software.
- Home stages.
- Click the Initialize button on the
DEIMOS dashboard window to access the
Recalibrate/Initialize/Stow Instrument.
- Click the Recalibrate All button and
verify that all stages home properly.
- If any stages fail to home, retry them once by
clicking the corresponding green button on the
Recalibrate/Initialize/Stow Instrument
panel (but note that the Rotator button is
not operable.
- If a stage again fails to home, you may need to
enlist the help of summit personnel to fix it.
Note that the most likely problem you will
encounter is a failure of the grating to unclamp; please
refer to these
instructions for remedial assistance.
- Home rotator.
- Reset stages to nominal positions. On the
Recalibrate/Initialize/Stow Instrument panel,
click the Default DEIMOS Configuration at the
bottom of the panel and verify that the stages successfully
reach their desired destinations as listed in the file
/local/kroot/data/deimos/stowPositions.tcl
- Check CCD shutter. In an xterm on
deimosserver, issue the command
cycle_shutter -100
to verify that the shutter will open. The shutter
generally fails to open for several iterations if it
has not recently been exercised. The script will run
the shutter until it opens successfully up to a
maximum of 100 times. If the last attempt succeeds,
then the shutter should be ok.
- Adjust science CCD bias.
- Check CCD parameters.
- Check internal lamps.
- As dmoseng@deimosserver, execute the
script ~dmoseng/scripts/test_lamps script, which will:
- Insert any available longslit mask.
- Insert 1200G at 7800A plus OG550 filter
- Configure CCD for spectroscopy
- Acquire 1s exposures on each lamp after 30s warmup
(180s for some lamps)
- Verify that you get light from each lamp by checking
for a spectrum on the corresponding image.
- Check FCS lamps.
- As dmoseng@deimosserver, execute the
script ~dmoseng/scripts/test_fcs_lamps, which
will acquire one FCS image for each of the FCS lamps (Cu1,
Cu2, LED) in zeroth order on slider 3.
- Check that the output images include one dot on each CCD.
- Check dewar focus values.
- As dmoseng@deimosserver, issue the command
do_focusloop internal R
to acquire a focus sequence in R.
- When this completes, use the DEIMOS Utilities
> Analyze Focusloop option on the DEIMOS
pulldown menu to analyze the results and derive a focus
value.
- Type this value into the dashboard GUI.
- Check guider.
- Bring up guider software:
- Call summit support personnel and request
permission to use K2 Xguide software for 30 minutes.
- Log into k2server via
rsh k2server -l k2obs
- set DISPLAY and run
xhost/xauth
- Launch DCSGUI via dcsgui < /dev/null &
- Click on Qwick >
guider > current to run the Solaris guider
software.
- Wait for Xguide and eavesdrop windows
to appear.
- Configure instrument for bias frames:
- Launch a DEIMOS dashboard GUI from the
OpenWindows menu or instr_menu widget via
DEIMOS Control Menu > Subcomponents... >
Restart Dashboard GUI
- Turn off internal lamps by clicking the OFF button in the lamps
area.
- Insert a slitmask such as GOH_FOO.
- Click on the TV Guider
button to launch the TV panel.
- On the TV panel, click on the filter selector
button and select the ND2 filter, then
click on the Go button to
change the filter.
- Acquire guider bias frames using Xguide:
- Select the DEIMOS guider
- Set binning to 1
- Set exposure time to 1ms
- Turn image update on
- Save 3 camera images by setting Save
image to 3 and clicking the
S button.
- Configure instrument for guider flats:
- On the TV panel, click on the filter selector
button and select the R filter, then
click on the Go button to
change the filter.
- On the main dashboard, turn on the Qz
lamp.
- Acquire guider flats using Xguide:
- Save 3 camera images by setting Save
image to 3 and clicking the
S button.
- Analyze images for gain and readnoise. As of 2007-Jul-07:
- gain = 2.76 e-/DN
- readnoise = 8.5 e-
- region = [200:600,700:900]
measured via the Kassis method in IDL.
- Analyze flux level to check camera sensitivity
- Focus guider.
Nighttime Checkout
These procedures are run at night to calibrate the instrument.
- Check throughput
- Use setup of 1200G@7800A, slitless
- Put standard star at SLIT P.O. The preferred
standard star is BD+28deg1142 from the flux standards list.
- Acquire 5s exposure
- Extract and compare to Ricardo's data
Note: would useful to have 3 or 4 chosen standards spaced in
RA such that at least one is always accessible
Go to:
DEIMOS Home Page -
Instruments Home Page -
Keck Home Page
Last modified: Wed Nov 19 17:07:48 HST 2008
