I have both the Datastorm F-3 unit and the KVH Tracnet systems. The Datastorm system is much easier to use and there is no cost associated with data transfer. The downside, you have to stop and pull over to launch the dish. Once pulled over, I can usually have broadband speeds within 3-4 minutes... works great !!
The KVH will work in-motion as well as stationary, but it requires the use of sat. phone and/or terrestrial cell phone for two-way ability, and there is a significant cost involved. So, I use the KVH for "emergencies only".
Yes, they're expensive, but there are options available...
www.datastorm.com
www.groundcontrol.com
www.kvh.com/kvhinternet/
There are also some satellite phones that have modem ability, but again, they're VERY costly. You can pick up a Datastorm unit for about $5k.
The F-3 is about $9k installed. I did the install myself, so that saved some money.
One other thing to mention about the Datastorm... I am currently working on a software extrapolation that will take the tuneable transmit/reflect signal strength of the dish and convert that into a very "makeshift" radar. The unit is tuneable from 955MHZ to 1040GHZ.
It's actually worked quite well in determining and recognizing stronger hail cores! :wink:
Still, for simplicity, I just rely on the Wx Worx system for instant radar.
Hope those links help.