[time-nuts] Lady Heather Question

[Robert Watzlavick]

I think the graph is not using peak detect for the plotting.  I leave 
mine set at a 12-hour window and all the points are moving around every 
second.  When plotting more data than will fit in the available 
resolution, it is best to "bin" the points that correspond to each plot 
bin/pixel.  Then you can plot a bar (min/max) or a single point (mean) 
for that bin.

-Bob

On 05/02/2011 01:14 AM, Ed Palmer wrote:
> I've been running Lady Heather for some months now.  I've always been 
> puzzled by one characteristic of the graphs.  If I use a view setting 
> of anything other than 1 sec. per division, the oscillator graph in 
> particular, 'runs wild'.  Spikes appear and disappear.  From second to 
> second the sdv value can swing up and down by 10 or 20 ppt or more.  
> The ADEV values reported by Lady Heather are stable at 1.x e-8 @ 1 
> sec. and 1.x e-12 @ 10K sec. through this.  My ability to measure ADEV 
> at low Tau values is not great, but I'm getting numbers in the e-12 
> range for Tau = 1-10 seconds which suggests that the Osc isn't all 
> that bad.
>
> Lady Heather Version 3.0; Jan. 15 - 2011.
> Autoscaling of the graphs is disabled.
> Time Constant, Damping, & Gain are at default
> Satellite constellation is stable.  Right now it happens to be 5 
> satellites.
>
> What's going on?
>
> Thanks,
> Ed
>
>
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