Introduction
The Facilities Summary (FACSUM) display is an informational widget
providing the current telescope status (pointing, date, guiding,
focus, etc.). FACSUM is a monitor program and offers no
controls. Below is a description of the information items located on
the FACSUM widget.
To start FACSUM, right click on a blue background desktop
in your VNC session and from the popup menu select, depending on
the instrument:
K2 Telescope Status Menu → FACSUM
or:
Telescope GUIs → FACSUM
Stop FACSUM by using the Close option from the window
menu, accessible by clicking the button at the top left of the
window.
FACSUM: Typical status during a slew.
Status
Indicators
|
Name |
Description |
Indicators |
Telescope |
Telescope Status |
Tracking
Slewing
Not Controlling
No Status |
Mirror |
Active Control System Status |
Running
Idle
No Status |
Guider |
Guiding status |
Guiding
Not Guiding
No Status |
Dome |
Dome status |
Tracking
In Position
Standby
No Status |
Rotator |
Instrument Rotator Status |
Tracking
Unknown
Standby
Faulted
No Status |
FocalStn |
Focal Station |
N/A
Unknown
LNAS
RNAS
etc
|
Information Fields
|
Name |
Description |
LST |
Gives the Local Siderial Time.
This corresponds to the Right Ascension currently crossing the
meridian.
|
UT |
Universal Date and Time
(note: 10 hours ahead of HST) |
Target |
Name of the target as given
in the starlist. The target will read slewing
when moving to an object. Note: The target name is written
in white above the base coordinates, and there is not
label.
|
Base Coordinates |
RA (α) and Dec
(δ) to which the telescope was originally pointed.
Due to tweaks required to center objects, atmospheric
dispersion, etc., this will tend to differ from the
current coordinates. |
Current coordinates |
RA (α) and Dec
(δ) now lying at the
selected pointing
origin.
|
Offset |
These numbers, lying below
the current coordinates
indicate the offsets between
the base and current
coordinates. [arcsec]
|
Equinox |
Equinox of the coordinate system. [years] |
Time to limit (h) |
Time remaining until this target
will become inaccessible due to either telescope constraints
(Tel) or rotator constraints (Rot).
|
El |
Current telescope altitude angle. [degrees] |
Az |
Azimuth angle of the
telescope. [degrees]
|
Dome |
Azimuth angle of the dome. [degrees] |
TopShut |
Angle of the dome top shutter. [degrees] |
BotShut |
Angle of the dome bottom shutter. [degrees] |
HA |
Hour angle. The difference
between the LST and the RA, this gives a measure of how
long until (or since) the object crosses the
meridian.
|
Airmass |
The number of airmasses lying
along the path to the target. When overhead, the value is
1.
|
Focus |
Position of the secondary
mirror piston, a gross measure of focus. [mm]
|
INST |
Current operating
instrument
|
PO |
Current selected pointing origin (see
the pointing origins
documentation )
|
CA, CE |
Pointing model parameters for
the Azimuth and Elevation axes |
Rot Mode |
Current operating mode of the
rotator. Options are: Stationary, Position angle, Vertical
|
Sky PA |
Position angle of the
instrument relative to celestial
North. [degrees]
|
Drive |
Physical rotator angle. [degrees] |
ACS Move |
M1 Active Control System moves. [nm] |
Sens Res |
M1 edge sensor. [nm] |
Sens Range |
M1 edge sensor range. [μm] |