| FITS keyword | content |
| SLIT | number of slitlet in which the dispersion relation has been determined (LSS: always 1) |
| ROW | row in which the dispersion relation has been determined (Y coordinate of center row, offsets of 25 pixels) |
| Y | same as ROW |
| COEF_i | coefficients of dispersion solution |
| BASURA | technical parameter |
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