Hi Doug,
You might check out Lynn KJ4ERJ's APRSISCE/32 package. The development version can track satellites, and as an APRS App it's dynamically self-position aware by default. I don't think it currently outputs to anything that can drive an antenna or Doppler tracking, but the program is under active development and it's rumored that he can be bribed to make enhancements with suitable quantities of Mountain Dew. Even so, you will need to be creative in the lash-up.
Greg KO6TH
Date: Thu, 5 Jan 2012 06:39:29 +0000 From: faunt@panix.com To: amsat-bb@amsat.org Subject: [amsat-bb] Re: Looking for a G3RUH dish
Speaking of which, can any of the available amateur software packages handle a moving ground station? I'd like to be able to automate the antenna tracking on a boat.
73, doug