To expand the possibilities of OBS_E Macros I created a new OBS_E command, that makes available to the user some important real-time parameters of the running telescope system. Using these parameters it is possible to create macros running more automatically than before. These parameters are the local sidereal time, the parallactic angle and the commanded and actual positions in azimuth and elevation. They can be used in OBS_E as local (SIC) variables and will be refreshed by calling an OBS_E command.

The local (SIC) variables (as floating point numbers) in OBS_E are:

local_sit[1] =  the local sidereal time [in hours]
local_sit[2] =  the parallactic angle [in degrees]

tel_ist[1] =  azimuth position  [in degrees]
tel_ist[2] =  elevation position  [in degrees]

tel_soll[1] = commanded azimuth position [in degrees]
tel_soll[2] = commanded elevation position [in degrees]

All these variables will be refreshed by a call to the OBS_E command:

                              TEL_PAR

Example:

!           SIT = 22:00 - 10:30  ---> cal source 1
!             otherwise  cal source 2
 

tel_par
!   Now the real-time parameters are refreshed
if (local_sit[1].le.10.5.or.local_sit[1].ge.22) then
   source meine1
else
   source meine2
endif
pointing

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