grdfilter(1gmt) on Linux
The text 815ee119a4f0, as Debian 6.0 (Squeeze), Debian 4.0 (Etch), Debian 3.1 (Sarge) shipped it.
Filter a .grd file in the Time domain
Flags it lists
-
-D -
-F -
-G -
-I -
-R -
-T -
-V