Default template files have been created that specify the spatial pixel
numbers to be avoided in the Pass 1
background extraction for each camera and for all
source types (point, extended, and noncontinuum) sources. The file also
includes values for nc, nf, and nd of the IOR. Initially,
the list of spatial positions to be avoided includes only the starting and
ending values and the echelle order positions, but this is modified for
a particular image in the initial Data
Screening step
from the 
flags determined in RAW_SCREEN.