All parameters may be supplied as ! (the parameter-system null value) this indicates that the current value is to be left unchanged if one exists (this will be shown as the default and can also be accepted by pressing return) or that a value is not to be assigned for this global parameter. If a value is not assigned it will be defaulted or prompted as appropriate when other CCDPACK applications are run.
If you are using CCDPACK Sets, then some of the parameters describing device characteristics may differ according to which member of each Set is being described. By setting the BYSET parameter to true, and supplying a value for the INDEX parameter, you can indicate that the global values you supply apply to the members of each Set with that Set Index. In this case it will be necessary to run CCDSETUP once for each Set Index to be used (for instance, once for each chip in a mosaic camera), giving a different INDEX value each time. This applies to the global parameters ADC, BOUNDS, DEFERRED, DIRECTION, EXTENT, MASK, RNOISE and SATURATION.
The removal of global parameters is performed by the CCDCLEAR application.
When position lists (which are just text files of positions with either an index, an X and a Y value, or or just X and Y values) are used the option exists to associate them with a particular image. This is achieved by entering the name of the position list file into an image's CCDPACK extension under the item "CURRENT_LIST". Associating position lists with images has the advantage of allowing wildcards to be used for the input names and makes sure that positions are always used in the correct context (this is particularly useful when determining inter-image transformations). [TRUE]
This header information will only be present if it has been added (to the image itself or to one earlier in the reduction chain from which it was produced) by running the MAKESET program. If it is not present, the programs will behave as if USESET was false anyway, so it is normally quite safe for USESET to be TRUE. However, in some cases (especially if intermediate files are stored in foreign, i.e. non-NDF data formats) it may be more efficient to set this parameter false. You should also set it false if you wanted CCDPACK programs to ignore existing Set information for some reason.
If BYSET is true, this parameter will default to true also. [FALSE]
#If you are using CCDPACK Sets, then some lines of this file may be of the form "setindex,keyword=value"; so this sequence:
# CCDPACK - Restoration file
# Written by pdraper on Wed Sep 6 17:41:54 1995.
ADC = 1 ! electrons/ADU
RNOISE = 9.95 ! Nominal readout noise in ADUs
EXTENT = 6, 119, 1, 128 ! Extent of useful CCD area
BOUNDS = 1, 5, 120, 128 ! Bounds of bias strips
DIRECTION = X ! Readout direction
DEFERRED = 0 ! Deferred charge in ADUs
MASK = ccdtest_ard.dat ! Defect mask
SATURATE = TRUE ! Look for saturated pixels
SATURATION = 180000 ! Saturation value
SETSAT = FALSE ! Set saturated pixels to saturation value
PRESERVE = TRUE ! Preserve data types
GENVAR = TRUE ! Generate data variances
NDFNAMES = TRUE ! Position lists associated with images
LOGTO = BOTH ! Log file information to
LOGFILE = CCDPACK.LOG ! Name of logfile
1,RNOISE = 9.80 ! Nominal readout noise in ADUs (Set Index 1)would give the different values for each member of each Set of images.
2,RNOISE = 8.65 ! Nominal readout noise in ADUs (Set Index 2)
3,RNOISE = 9.10 ! Nominal readout noise in ADUs (Set Index 3)