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dqfpar stsdas.hst_calib.wfpc


NAME · USAGE · DESCRIPTION · PARAMETERS · BUGS · SEE_ALSO

NAME

dqfpar -- Edit the parameter set to select Data Quality File (DQF) flags.

USAGE

dqfpar

DESCRIPTION

The `dqfpar' parameters specify whether the DQF files are referenced for pixel rejection in WF/PC or WFPC-2 images for the `combine', `noisemodel', and `wstatistics' tasks. When combining images, this rejection, or "masking", may be selected for any of the available options except summation. Note that the DQF files MUST have the same rootname as the input images, they must have the same file extension as specified by the `dqfextn' parameter, and the data must be of type "integer" or "short". The values are masked by virtue of their DQF flags BEFORE the selected operation takes place---e.g., values that are rejected during a `combine' operation are IN ADDITION to those masked based upon DQF values.

You can specify which types of errors are to be rejected by setting various flags in this pset. For example, setting `rsbit = yes' will exclude all input values that suffered Reed-Solomon errors from the operation, but setting `rsbit = no' includes them. The bit-codes are then stored in a 32-bit integer constant which is Boolean ANDed with the actual DQF values corresponding to the input values for each pixel.

Note that this is a pset, not an executable task; it defines a set of parameters used by other tasks. Invoking the pset by name runs `eparam' on the parameter set, allowing the user to modify the parameters. Alternatively, the parameters may be modified on the command line by specifying the pset name and parameter name. For example, the user can type "dqfpar.rsbit=no" to ignore the Reed-Solomon error data flags. Parameters can also be edited by using `eparam' on the calling task (e.g., by typing "eparam combine"), in which case `dqfpar' will appear as one of the task parameters; the `dqfpar' parameters may then be edited by positioning the cursor on the line containing the pset name and typing ":e". After editing the pset parameters, type <Cntrl>-Z to return to the main task parameter menu.

PARAMETERS

(datextn = "c0h") [string]
Filename extension denoting data file. The default value is the standard PODPS file extension given to calibrated WFPC and WFPC-2 frames.
(dqfextn = "c1h") [string]
Filename extension denoting DQF file. The default value is the standard PODPS file extension given to calibrated WFPC and WFPC-2 frames. Note that the DQF file must have the same rootname as its associated data header file.
(rsbit = yes) [boolean]
Reject pixels with Reed-Solomon errors (DQ = 1)?
(calbit = yes) [boolean]
Reject pixels with calibration file defects (DQ = 2)?
(defbit = yes) [boolean]
Reject permanent camera defects (DQ = 4)?
(satbit = yes) [boolean]
Reject saturated pixels (DQ = 8)?
(misbit = yes) [boolean]
Reject missing data (DQ = 16)?
(genbit = yes) [boolean]
Reject generic bad pixels (DQ = 32)?
(ovrlapbit = yes) [boolean]
Reject image overlap pixels (DQ = 64)? (WFPC2 only)
(crbit = yes) [boolean]
Reject pixels flagged as cosmic rays (DQ = 128)?
(trapbit = yes) [boolean]
Reject trap column column pixels (DQ = 256)? (WFPC2 only)
(hpbit = yes) [boolean]
Reject "unfixable" hot pixels (DQ = 512)?
(fixhpbit = yes) [boolean]
Reject "fixed" hot pixels (DQ = 1024)?

BUGS

SEE ALSO

combine, noisemodel, wstatistics


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