Data Model: ooi.I

General Description
The ooi.I files are images where synthetic sources with known flux were injected into one CCD per exposure at the 10% level in order to validated the photometric solutions. Thus each ooi.I file usually has only one extension with the nomenclature CDDI to indicate the parent CCD into which the sources were injected. This processing was introduced in DR2.
Naming Convention
c4d_[0-9]{6}_[0-9]{6}_ooi_[grizY]_v1\.I\fits\.fz, where the numeric label corresponds to a rough exposure date-time, "ooi" indicates this is an image file, the band observed is indicated (grizY), a version number for the NOIRLab community pipeline which performs image preprocessing is appended, and the "I" indicates that a synthetic injection has occured. This naming convention follows the convention set by NOIRLab.
Approximate Size
5 MB
File Type
FITS
Sections

HDU0: PRIMARY

Exposure level header containing meta information about the telescope, pointing, etc. For more details, see the NOIRLab (formerly NOAO) documentation. Identical to that in the ooi file (see ooi model).

HDU1: N7I

Injection image created by injecting sources into the image from the CCD specified by the HDU name. Header contains CCD level information from the telescope and is identical to the header for the same CCD without injection in the ooi file (see ooi model). The ZDITHER0 value used to compress the ooi.I file was simply ZDITHER0+=1 relative to the original ooi file (wrapping around at 10000).

HDU Type
IMAGE
HDU Size
5 MB

Examples

An example ooi.I file is linked here: c4d_190503_101947_ooi_Y_v1.I.fits.fz