mgd77magref(1gmt) on Linux
The text 0156fb068870, as Debian 7 (Wheezy) shipped it.
Evaluate the IGRF or CM4 magnetic field models
Flags it lists
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-: -
-A -
-C -
-D -
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-F -
-G -
-H -
-L -
-Sc -
-Sl -
-V -
-bi -
-bo -
-m