Manipulation of Raw Data

The first stage makes an NDF, or multiple NDFs stored in an HDS container file, located in $ORAC_DATA_OUT, the actual operation depending on the instrument. In some cases like UFTI, this is dealt by the ORAC-DR infrastructure, including conversion from FITS for early UFTI data.
[$<$instrument$>$/_CREATE_RAW_FRAME_]

For IRCAM the recipes are merely copying the raw NDF, because the original raw files are normally write protected.

UIST and Michelle both copy all the components of multi-NDF container file. These container files have a HEADER NDF of the observation-wide FITS headers, and NDFs of chopped beams or integrations. Recipes check that two integrations are present for a chopped observations or one integration for other modes, exiting with an error message if either test fails. A single integration NDF is merged with the HEADER NDF into a simple NDF.