LOFAR LoTSS-DR3 metadata schema
Created: 16 February 2026
Metadata fields
This schema has 26 metadata fields.
| Unique name | Label / Description | Type | Use |
|---|---|---|---|
| accref | Access key Access key for the data |
xs:normalizedString | Optional |
| centeralpha | Image center RA Approximate center of image, RA |
xs:decimal | Optional |
| centerdelta | Image center declination Approximate center of image, Dec |
xs:decimal | Optional |
| instid | Instrument identifier Identifier of the originating instrument |
xs:normalizedString | Optional |
| dateobs | Epoch Epoch at midpoint of observation |
xs:decimal | Optional |
| datefirstobs | First epoch Epoch of first observation |
xs:decimal | Optional |
| datelastobs | Last epoch Epoch of last observation |
xs:decimal | Optional |
| dateallobs | All epochs Epoch of all observations |
xs:decimal multivalue | Optional |
| naxes | Axis count Number of axes in data |
xs:number | Optional |
| pixelsize | Image dimensions Number of pixels along each of the axes |
xs:integer multivalue | Optional |
| pixelscale | Pixel scale The pixel scale on each image axis |
xs:decimal multivalue | Optional |
| refframe | Reference frame Coordinate system reference frame |
xs:normalizedString | Optional |
| wcs_equinox | Equinox Equinox of the given coordinates |
xs:decimal | Optional |
| wcs_projection | Projection type FITS WCS projection type |
xs:normalizedString | Optional |
| wcs_refpixel | Reference pixel WCS reference pixel |
xs:decimal multivalue | Optional |
| wcs_refvalues | Reference pixel coordinates World coordinates at WCS reference pixel |
xs:decimal multivalue | Optional |
| wcs_cdmatrix | Matrix FITS WCS CDij matrix |
xs:decimal multivalue | Optional |
| bandpassid | Bandpass name Freeform name of the bandpass used |
xs:normalizedString | Optional |
| bandpassunit | Bandpass unit Unit of bandpass specifications (always m). |
xs:normalizedString | Optional |
| bandpassrefval | Bandpass quantity Characteristic quantity for the bandpass of the image |
xs:decimal | Optional |
| bandpasshi | Bandpass upper limit Upper limit of the bandpass (in BandPass_Unit units) |
xs:decimal | Optional |
| bandpasslo | Bandpass lower limit Lower limit of the bandpass (in BandPass_Unit units) |
xs:decimal | Optional |
| pixflags | Processing flags Flags specifying the processing done (C-original) |
xs:normalizedString | Optional |
| coverage | Image field Field covered by the image |
xs:decimal multivalue | Optional |
| id | Identifier |
xs:normalizedString | Optional |
| related_products | Observation relation Link related products for the observation |
xs:normalizedString | Optional |