FACSUM: Typical display of facsum
To start FACSUM, right click on the desktop and from the popup menu select:
K1 Telescope Status Menu --> FACSUM
Stop FACSUM by using the Close option from the window menu, accessible by clicking the button at the top left of the window.
| Status Indicators | |||
|---|---|---|---|
| Name | Description | Indicators | |
| Telescope | Telescope Status | tracking slewing not controlling No Status |
|
| Mirror | Active Control System Status | run 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 standby fault No Status |
|
| 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) | ||
| Time until limit (h) |
Time remaining until this target will become inaccessible due to telescope constraints. | ||
| Target limit (h) |
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] | ||
| Eq. | Equinox of the coordinate system. [years] | ||
| El. | Current telescope altitude angle. [degrees] | ||
| Rotator 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]. (Meaning in stationary mode ????). | ||
| Drive | Physical rotator angle. [degrees] | ||
| 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] | ||
| Dome | Azimuth angle of the dome. [degrees] | ||
| AZ | Azimuth angle of the telescope. [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. | ||
| ca, ce | |||
| PO | Current operating instrument and name of the selected pointing origin . To view the pointing origins, see the pointing origins documentation | ||