Changes to Device and Log FITS files for the GBT

This page contains an unsorted list of changes in the FITS files as generated by GBT devices from the untracked versions which are undefined and undocumented (possibly containing the keyword GBTMCVER with the value 0.0) to the first defined and documented version (labeled GBTMCVER=1.1).

The keyword MANAGER is dropped from the primary HDU except for DAP and engineering files.
The keyword DATEBLD is added to the primary HDU and is generated from the Unix command 'date -u' when the program generating the FITS file is linked.
For backends, the primary HDU contains the keyword BANK if all the data in the file is from the same BANK.
For DAP and engineering files, the value of INSTRUME is "sampler2log" and "Archivist" respectively rather than the concatenation of the values of DEVICE and MANAGER.
The keywords GBTMCVER and FITSVER are added to the primary HDU.
In the primary HDU where the were used, the keywords STRTTIME, SOURCE, and SCANID are replaced by DATE-OBS, OBJECT, and OBSID respectively.
In the Spectrometer's SAMPLER Binary Table Extension the words PORT_A and PORT_B are used in lieu of SAMPLERA and SAMPLERB for keywords and column names.