Index: dev_comm/excitation.txt
===================================================================
--- dev_comm/excitation.txt	(revision 24005)
+++ dev_comm/excitation.txt	(revision 24006)
@@ -69,11 +69,19 @@
    unit: N.A.
    help: This is the name of the matterial the excitation box will be made of.
   k_dir
+   long name: Unit Vector of Wave Propogation Direction
+   type: vector
+   unit: 
+   help: 
   E_dir
+   long name: electric field polarization vector
+   type:
+   unit:
+   help: this must be orthagonal to K_dir.
   f0
-   long name: ??ask thorsten??
-   type: 
-   unit:
+   long name: frequency for numerical phase velocity compensation
+   type: integer
+   unit: Hz
    help: this is optional
 
 % output format: