[time-nuts] Rb as source for ADEV?

[Bob Stewart]

Thanks for the correction.  "Averaging Time, τ, tau" it is.

Bob




>________________________________
> From: Tom Van Baak <tvb at LeapSecond.com>
>To: Discussion of precise time and frequency measurement <time-nuts at febo.com> 
>Sent: Thursday, February 6, 2014 9:31 PM
>Subject: Re: [time-nuts] Rb as source for ADEV?
> 
>
>> Hi Tom,
>>
>> If I understand you right, the only thing I need from the adev program is the OADEV values and those are the new
>> ADEV? Here's the plot for the past 24 hours using "0" for bins. It takes a few seconds to run, doesn't it? 
>
>Yes, just grab the code for calc_adev() in http://leapsecond.com/tools/adev_lib.c and always set ovlp = 1. Either way, it's ADEV; it's just that the overlap method gives better results (smaller error bars).
>
>> http://www.evoria.net/AE6RV/GPSstd_PLL/Plots/ADEV.2.6.png
>
>Suggestion: do not label the x-axis "time in seconds". This gives the impression that the axis is some sort of elapsed time. Better wording might be "integration time", or "sampling interval", or "averaging time", or "tau", or "sampling interval, tau".
>
>/tvb
>
>
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