Character descriptor FILTSTAT

This descriptor specifies the state of filter temperature control. It contains the value 'REGULATED' if filter temperature is regulated; 'MEASURED' if filter temperature is measured; and 'DOME' if filters are unregulated, and approximately at dome temperature.

If FILTSTAT= 'REGULATED', there may be a Real*4 descriptor named FILTTEMP in the instrumental ``.tbl'' file, giving the temperature of the set-point in kelvins. If FILTSTAT= 'MEASURED', there should be a data column named FILTTEMP in the data files (see next section) that contains the measured filter temperature.

 

Name Contents Variable Type When used

name of instrument C*72 string always

no. of filter carriers I integer always

filter catalog name C*80 string always

filter thermostating C*9 string always

filter temperature R*4 real FILTSTAT=REGULATED

no. of detectors I integer always

condition of optics C*7 string always