visir_util_undistort(7) on Linux
The text 9e726f113863, as Debian 10 (Buster) shipped it.
Correct the distortion in spectral data
Flags it lists
-
--bkgcorrect -
--hori_arc -
--slit_skew -
--spectrum_skew -
--vert_arc -
--xh -
--xl -
--yh -
--yl