dimfilter(1gmt) on Linux
The text 224c5e3bac3e, as Debian 8 (Jessie) shipped it.
Directional filtering of 2-D gridded files in the space (or time) domain
Flags it lists
-
-D -
-F -
-G -
-I -
-N -
-Q -
-R -
-T -
-V