decode filter name into names and wavelengths of filters in front of
each instrument section in use SCULIB_DECODE_FILTER
The filter name should be in format short:long where these are the names of the filters in front of the short and long-wave focal planes.
’350’ short wavelength = 350.0 name = ’350’
’450’ 450.0 ’450’ ’600’ 600.0 ’600’
’750’ 750.0 ’750’ ’850’ 850.0 ’850’
’PHOT’ -1.0 ’BLANK’
’350’ long array = 350.0 name = ’350’
P1100, P1300, P2000 350.0 ’350’
’450’ long array = 450.0 ’450’
P1100, P1300, P2000 450.0 ’450’
’600’ long array = 600.0 ’600’
P1100, P1300, P2000 600.0 ’600’
’750’ long array = 750.0 ’750’
P1100, P1300, P2000 750.0 ’750’
’850’ long array = 850.0 ’850’
P1100, P1300, P2000 850.0 ’850’
’PHOT’ long array = -1.0 ’BLANK’
P1100 = 1100.0 ’1100’ P1300 = 1300.0 ’1300’
P2000 = 2000.0 ’2000’
If the filter name does not fit the ‘pattern’ described an error message will be output and the routine return with bad status. The routine is insensitive to the case of ‘PHOT’.