This is a follow up to the thread http://diydrones.com/forum/topics/we-consider-offering-radar-altimeter-for-uav-s
After seeing quite a bit of interest in radar altimeters, we are now launching an IndieGoGo campaign to create an open-source radar: http://www.indiegogo.com/dipper
This means that if you need a high-resolution short range radar altimeter for autolanding or a longer range radar altimeter for other purposes, you can modify the radar to fit your purpose.
Questions are welcome!
All the best