"Hi Bill, I am currently trying to solve the following issue but do not seem to make much progress, and was hoping you could maybe shed some light on the subject (will be looking into it again tomorrow). I am implementing the DCM algorithm for use…"

"Bill, This is quite impressive. Many thanks for the thorough explanation - as always. Best regards, Elardus"

"Hi Bill, Looking at the offset correction in the MatrixNav code: zaccel.offset = zaccel.value - 2*GRAVITY ; // GRAVITY is measured in A-D/2 units and gplane[2] = ( zaccel.value>>1 ) - ( zaccel.offset>>1 ) ; ... the following struck…"

"Hi Bill, Thanks for the thorough explanation. Best regards, Elardus"

"Hi Bill, I read in the posts and PDF guides that you experienced some problems with high frequency signals on the gyros (for instance when you tapped against the gyros). You solved it by oversampling at 5kHz, low pass filtering and decimation. BTW,…"

"Bill, Brian, many thanks for the replies. I think I came across something which may be a bigger hurdle to overcome in a car than the low speed GPS one. The RollPitchCorrectionPlane is computed as the cross product of the Zrow of the rotation…"

"Hi All, Has anyone out there tried to apply the DCM approach to a terrestrial vehicle (car, bus, etc.) to determine pitch and roll while driving (these angles would of course include both the road attitude and vehicle attitude relative to the road…"