IRAF Help page for: FILTER_FILE
FILTER_FILE (Mar95) merge FILTER_FILE (Mar95)
RUNNING MEAN FILTER FILE --
ASCII file generated by the user containing weights for the filter
used by the temporal running mean. This file is used by task
FILT_COR. It is the same as the filter file used by task FILT_MAP
in XSUNTRANS. This file is not needed if a block running mean or a
difference filter is used. The file is organized as follows. No
provision for renormalization is included for weights which do not
sum to unity.
Record 1: comment line for file identification
Record 2: nfslot number of filter lines input
Records 3 through (nfslot + 3). 1 integer word and 1 real word as
nfc = number of the filter slot.
fconst[nfc] = value of the weight
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