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.

 

Table: All possible Descriptors for the instrumental ``.tbl'' file

Name	Contents	Variable Type	When used
INSTNAM	name of instrument	C*72 string	always
NFILTCAR	no. of filter carriers	I integer	always
FILTCAT	filter catalog name	C*80 string	always
FILTSTAT	filter thermostating	C*9 string	always
FILTTEMP	filter temperature	R*4 real	FILTSTAT= REGULATED
NDETS	no. of detectors	I integer	always
CONDITION	condition of optics	C*7 string	always