FITS¶

Reserved Keywords¶

Some keywords in the final Data Product are reserved by OCM and/or DPM and should not be provided by user. If they are provided then they will be overwritten.

Primary HDU keywords:

ARCFILE: Specifies final file name used in archive. It has the form {fileId}.fits.
CHECKSUM: Checksum of entire HDU. This is updated/written as the last thing done by daqDpmMerge together with DATASUM.
DATASUM: Checksum of HDU data unit alone. This is updated/written as the last thing done by daqDpmMerge together with CHECKSUM.
DATE: Time the file was written.
ORIGFILE: Specifies original file name.

Structure Keywords¶

The following keywords are excluded from Keyword Rules by default as they are defining the structure and cannot simply be copied.

Mandatory Keywords¶

SIMPLE
BITPIX
NAXIS
NAXISn
XTENSION
PGCOUNT
GCOUNT
TFIELDS
TFORM
TFORMn
TBCOLn
GROUPS
END