FACSUM
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] | ||
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