This page describes the Observer Gui that is available to the
observer during the afternoon and night. This gui is
automatically started when the LRIS software is started. If it
is not an ADC night, the gui should be shutdown manually.
Under normal observing conditions, observers should do two
things with the observing gui.
- Set the optimal wavelength range. The default is 3400 to
9000. The range may be adjusted at anytime using the
"Change" button at the right of the wavelength range.
- Monitor along with the AO that the ADC is tracking during
- The "Status" value on the gui should say tracking
unless the telescope is below the minimum correction
- If below the minimum elevation, the adc status
will read "At Max."
- When the telescope is moved to
elevations within range of the ADC, the status should again
- If the status is "Halted" then the OA should
re-init the ADC. This should return the status to
The observer gui may be restarted using the pull down menus.
LRIS Control Menu -> Subcomponents... -> Re-start ADC GUI
Below is are screen shot of the observer gui when the ADC is
tracking and when the ADC is at
it's at is maximum separation because the elevation is below
30 deg. Below the images
are descriptions of the gui components and lists of possible values.
- DCS:currinst = the current instrument in use on K1. This
could have values of LRIS, LRIS-ADC, HIRES, NIRC. Note that
only LRIS-ADC is valid. All other values imply that the ADC
is not in use.
- adcprena = ADC Prisms Enable/Disable. Should be Enable
when in use.
- Separation = Prism separation measured in mm.
- El = Elevation of the telescope.
- Targ-Curr = The difference in position between actual and
desired position. When tracking this value should be zero.
- ADC Mode = Mode of operation. When in use, this should
say Track. Other modes are: Halt, Pos, Jog
- ADC Status: Should say Tracking or At Max
when observing. Other
modes are: Halted, Not Calibrated, Calibrated, Slewing,
Acquiring, Tracking, At Max, At Min, Ready
- Optimized For = The wavelengths over which the ADC is
optimized. This is an observer configurable setting, and may
be changed using the
Change button on the right.
- disconnected cables: what cables are disconnected. The
hand-paddle should be disconnected during normal operation.
- Error handling: on occasion you will see warning messages
appear at the bottom of the gui. As an example,
below is a picture of the
warning messages received when the ADC is not installed in
the telescope. Most of these may be ignored. If something
persists, contact your support astronomer.
Note that anything highlighted in yellow indicates a
In addition to track mode, there are three other modes that
may be displayed. If these modes occur during observing, this
could be an indication that there is a problem.
In the afternoon, before the OA initializes the ADC, the ADC
could be in one of the modes set above. This is not a problem,
and the ADC should be set to TRACK when the OA initializes the ADC.
- Halt - The ADC is stopped and is not
compensating. OA should restart tracking mode.
- POS - This is an engineering mode where the OA or SA is
sending the ADC to a known position.
- JOG - This is an engineering mode where the OA or SA is
moving the ADC a desired number of steps.