Perhaps it's some sort of cruel joke we're not in on but everything I've been able to find on the Internet about tilt-compensated headings from magnetometers leads to this paper [warning, it's a PDF]: http://www.ssec.honeywell.com/position-sensors/datasheets/sae.pdf

In it there is an algorithm for tilt-compensation. It's wrong. Here's what it should be: http://gist.github.com/322555

Ryan Beall is the man.

Find out what states you track in a 17 state extended kalman filter, what it takes to commercialize a UAV and what hardware object tracking involves.

Reed's profile on DIY Drones: http://diydrones.com/profile/ReedChristiansen

If you want to gain access to the pre-release source code as a tester or early adopter shoot me an email and I'll send you an invite → tim@dronedynamics.com

Please include your name and if you're on Windows, Mac or Linux (or anything else you want to tell me).

Invites will go out Tuesday.

Curtis explains some of the many uses of simulators including how a closed loop hardware-in-the-loop system works.

Curtis' profile on DIY Drones: http://diydrones.com/profile/CurtOlson

Flight Gear: http://www.flightgear.org/

Airframe modeling webpage mentioned during the show: http://jsbsim.sourceforge.net/aeromatic.html