The following keys are used to define a SCIENCE VISIR setup:
The following checks are performed:
imaging standard stars should be taken within +/- 3 hr from the science observations
telluric standard stars should be taken within +/- 2 hr and within the airmass difference of 0.2 from the science observation.
standard stars for coronography (SCI_CORO) and echelle (SCI_SPEC_ECH) are only observed if the PI
provides the required OBs.