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- Position: ra,dec of image center
- Size: NAXIS1, NAXIS2 in pixels, from FITS file
- Resolution: sqrt(BMAJ*BMIN), beam axial ratio BMAJ/BMIN. In some cases of wide fractional bandwidth CASA may write the beams to a FITS table extension, in which case the resolution of the of the lowest frequency plane plane (resolution varies with frequency, most users will convolve to the lowest resolution) . Note that for narrow spw, CASA will place the BMAJ and BMIN keywords in the header, but for wide spectral windows they can be placed in a table attachmentis the one to use: will need a new story for this case, in the meantime BMAJ and BMIN are set to zero if they are not present in the header.
- start time: DATE-OBS from FITS file
- end time: DATE-END from FITS file
- minimum frequency
- maximum frequency
- spectral resolution (spectral channel width (Hz); CDELT3 in the FITS header): will need a new story
- project
- polarization types: I
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