Warranty after fix for GTA02 GPS rework for SD card interferenceissue

Tilman Baumann tilman at baumann.name
Thu Jul 31 16:57:35 CEST 2008

Andy Green wrote:
> Hash: SHA1
> Somebody in the thread at some point said:
> | steve schrieb:
> |>   Amaybe when SD I/O occurs one could use the accelerometers to dead
> reckon?
> |
> | Dead reckoning without gyros is pretty hard.  In theory, the two
> | accelerometers are not mounted in the same place and thus could be used
> | to derive rotation, but in practice they're pretty close to each other,
> | and given the noise of measurement one is unlikely to derive a good
> | rotation from them.
> I don't think we need to worry about it, but in fact we wouldn't need to
> dead-reckon.  All we would need it for would be to put a ceiling on
> claims from noisy GPS about what accelerations we could have
> experienced.  If the GPS sample says we jumped 100m in 1s, but the
> accels didn't really see anything, we could ignore or meddle with the
> GPS sample.
Inertial navigation systems for the masses!
Anyone here who wants to write a kalman filter?

Besides the point that a small pocket-IMU would be great. To GPS jumts 
that big exist? As fas as i understand GPS it should have little jitter.

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