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Seb Madgwick replied to Bot Thoughts's discussion Magnetometer Soft- and Hard-Iron Calibration
"Thank you for sharing your work.  I have some hardware with extreme magnetic errors and also wrote some code using the linked ellipsoid fit in an attempt to make the magnetometer usable.  I thought it would be worth sharing these results in this…"
Sep 8, 2012
Seb Madgwick commented on robert bouwens's blog post Sebastian Madgwick's Quaternion solution - Episode II
"If the code you are using is from Google Code then its rather old.  The latest versions of the code are available (and maintained) here: http://www.x-io.co.uk/node/8"
Oct 4, 2011
Seb Madgwick posted a discussion
In previous UAV projects we have use the existing on-board sensors stabilise an on-board camera.  To avoid re-inventing the wheel for each UAV, I have been working on a ‘drop in solution’.  Here is a sort of work in progress. I have put together…
Mar 21, 2011
Seb Madgwick replied to William Blair's discussion A computationally inexpensive filter for IMUs
"I am the author of the paper and thought I could clear a few things up.

RE: "I am not sure what he means when he says "Unlike an IMU..."
I mean this literally: an IMU (Inertial Measurement Unit) consists of only inertial sensors and so may only…"
Aug 27, 2010
Seb Madgwick posted photos
Mar 1, 2010