* LeeE -- Monday 14 April 2008:
> I'm running a nasal loop at 1/(frame-rate/2), which typically works 
> out to between 10-20 Hz, but because the gps update rate is much 
> slower (0.45 sec if I'm interpreting the code correctly) the 
> results aren't very smooth - the effect is that the results follow 
> a sawtooth pattern i.e. they ramp up while the gps output is 
> unchanged but then drop back down when the gps output is updated, 
> and then start to ramp up again.

I'd try a variable interval EWMA lowpass like aircraft.lowpass().

m.
  

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