| AIRMEND | float | Airmass at end of observation | | obs.airMass |
| AIRMSTRT | float | Airmass at start of observation | | obs.airMass |
| astrom | Astrom | Information about the astrometry | | |
| chip | Chip | Information about the chip | | instr.det meta.id |
| creation_date | datetime | Date this object was created | | time.epoch |
| DATE | datetime | UTC date the original data file was saved | | time.obs |
| DATE_OBS | datetime | UTC date at the start of the observation | | time.obs |
| EXPTIME | float | Total observation time | sec | time.expo |
| extension | int | The extension to extract | | meta.fits |
| filename | str | The name of the associated file | | meta.id meta.file |
| filter | Filter | Information about the filter | | instr.filter meta.id |
| globalname | str | The name used to store and retrieve file to and from Storage | | meta.id |
| imstat | Imstat | Image statistics for the frame | | |
| instrument | Instrument | Information about the instrument | | instr.obsty |
| is_valid | int | Manual/external flag to disqualify bad data (SuperFlag) | | meta.code |
| LST | float | Local sidereal time at the start of the observation expressed as the number of seconds (a float) since UTC midnight | sec | time |
| MJD_OBS | float | Modified Julian date at the start of the observation (JD-2400000.5) | day | time_obs |
| NAXIS1 | int | Length of data in axis 1 | pixel | pos.wcs.naxis |
| NAXIS2 | int | Length of data in axis 2 | pixel | pos.wcs.naxis |
| OBJECT | str | Object name | | meta.id |
| OBSERVER | str | The observer | | obs.observer |
| observing_block | ObservingBlock | Information about the observing block | | |
| overscan_x_stat | Imstat | Statistics of the overscan region in the x-direction | | |
| overscan_y_stat | Imstat | Statistics of the overscan region in the x-direction | | |
| OVSCX | int | Number of overscan pixels in the x direction | pixel | instr.pixel instr.setup |
| OVSCXPRE | int | Number of overscan pixels to skip in the x direction at the edge of the chip | pixel | |
| OVSCXPST | int | Number of overscan pixels to skip in the x direction at the edge of the data region | pixel | |
| OVSCY | int | Number of overscan pixels in the y direction | pixel | instr.pixel instr.setup |
| OVSCYPRE | int | Number of overscan pixels to skip in the y direction at the edge of the chip | pixel | |
| OVSCYPST | int | Number of overscan pixels to skip in the y direction at the edge of the data region | pixel | |
| prescan_x_stat | Imstat | Statistics of the prescan region in the x-direction | | |
| prescan_y_stat | Imstat | Statistics of the prescan region in the y-direction | | |
| process_status | int | A flag indicating the processing status | | meta.code |
| PRSCX | int | Number of prescan pixels in the x-direction | pixel | instr.pixel instr.setup |
| PRSCXPRE | int | Number of prescan pixels to skip in the x-direction at the edge of the chip | pixel | |
| PRSCXPST | int | Number of prescan pixels to skip in the x-direction at the edge of the data region | pixel | |
| PRSCY | int | Number of prescan pixels in the y-direction | pixel | instr.pixel instr.setup |
| PRSCYPRE | int | Number of prescan pixels to skip in the y-direction at the edge of the chip | pixel | |
| PRSCYPST | int | Number of prescan pixels to skip in the y-direction at the edge of the data region | pixel | |
| quality_flags | int | Automatic/internal quality flag | | meta.code |
| raw_fits_data | RawFitsData | The multi-extension raw image | | |
| template | Template | Information about the template | | |
| UTC | float | Universal Coordinated Time (UTC) at the start of the observation expressed as the number of seconds (a float) since UTC midnight | sec | time |
