Data model: wiRun

General description: A description of unique geometrical coverage of each field in a RUN/CAMCOL, including only those pixels that are unique within the run (that is, [0:2047, 64:1424]). That is, the field areas defined in this file are non-overlapping. The geometry is expressed in terms of a spherical polygon for each field. Each spherical polygon is expressed as the intersection on the sphere of a number of "caps." See the mangle documentation for a full explanation.

Naming convention: wiRun-RUN6-CAMCOL.fits

Approximate size: 100 kbytes.

File type: FITS

Read by products: sas, photoop

Written by products: photoop

Required column names:

• XCAPS[3,4] (float64): direction on the unit sphere of each cap defining the field
• CMCAPS[4] (float64): size of each cap defining the field
• RUN (int32): drift scan run
• RERUN (string): reprocessing rerun number
• CAMCOL (int32): camera column
• FIELD (int32): field number
• NCAPS (int32): number of caps defining the polygon
• WEIGHT (float32): "weight" of polygon (place-holder, just "1" always)
• STR (float64): solid angle of polygon (steradians)
• USE_CAPS (int64): bitmask containing which caps to actually use

For IDL users, this file is in a "FITS" mangle format, readable by the idlutils routine "read_fits_polygons".

Example file: wiRun-004623-1.fits