General description: These PNG files shows the astrometry QA of SDSS relative to reference catalogs. There are files showing the global offsets for all camcols, and one for each camcol showing the fields. An index.html file in the directory provides a guide.
Naming convention: astromQA-CAT-offsets-RUN-CAMCOL.png, astromQA-CAT-offsets-RUN-all.png, astromQA-CAT-pmoffsets-RUN-CAMCOL.png
Approximate size: 100 kbytes.
File type: PNG
Read by products: photoop
Written by products: photoop