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OBS being based on SIC includes Variables and Functions which can be
used to tailor observing procedures.
Two important variables exist
- DSUN the distance to sun corresponding the time implied by
the last call to function ELEV, or the last OBS
SOURCE command. It can be used to check Sun
avoidance.
- SCAN the next scan number.
Three functions have been implemented
- ELEV(Dm) Returns the source elevation in degrees Dm minutes
from current time (ELEV(0) is the current source elevation).
A call to ELEV updates the DSUN variable.
- UT() Returns the current UT in hours.
- LST() Returns the current LST in hours.
Gildas manager
2002-02-04