ISOCAM Interactive Analysis User's Manual Version 5.0 - ISO - ESA

78 CHAPTER 12. DATA SLICING
3. At this stage you can choose to use the fast and less flexible sscd clean
(a) Use sscd clean to split the unsliced SSCD into its component sliced SSCDs, one per
CONFIGURATION.
(b) Save each of the sliced SSCDs.
OR
the slow and flexible scd find and scd del to slice the SPD SCDs.
(a) Identify the SPD SCDs which contain STATEs that you don’t want to keep, i.e. when
CAM is not in OP-MODE OBS. Use sscd info or scd find. Delete the unwanted
SCDs with scd del.
(b) If more than one CONFIGURATION exists in the AOT, identify STATEs of a configuration
you want to keep. Delete the SCDs corresponding to the remaining STATEs.
Again, use sscd info or scd find to help you do this.
(c) Save your sliced SPD SCDs by saving their SSCD with sscd write, though in a
different directory to where the original SCDs are stored. (You don’t want to overwrite
the old SSCD with the modified SSCD.)
(d) Restore the original SSCD and slice another CONFIGURATION (if there is one).
12.2.2 Slicing a raster observation (AOT#1)
An example procedure which illustrates the use of both automatic slicers follows: begin the
procedure at Step 5 if you are only interested in slicing SPD data products and skip that step
if you are only interested in slicing ERD data products.
1. Start a CIA session.
2. Assign useful directory paths to IDL variables:
In VMS. . .
CIA> product_dir = ’DKA200:[MDELANEY.PRODUCTS]’
CIA> scd_dir = ’DKA200:[MDELANEY.SCDS]’
CIA> sad_dir = ’DKA200:[MDELANEY.SADS]’
. . . and in UNIX. . .
CIA> product_dir = ’/home/mdelaney/products/’
CIA> scd_dir = ’/home/mdelaney/scds/’
CIA> sad_dir = ’/home/mdelaney/sads/’
3. Convert the ERD data products on disk to ERD SCDs in CIA. Use the CIA routine
erdtoscd to perform this conversion and automatically save the ERD SCDs to disk.
CIA> erdtoscd, ’cier14300601.fits’, erd_sscd, dir=product_dir, $
CIA> scd_dat=scd_dir, ack=ack