I sent in a reply posting with a 56.4K attachment and I noticed that at http://www.febo.com/pipermail/time-nuts/2009-August/039760.html NOTHING was shown for the Text or attachment
and on the other Archive; http://www.mail-archive.com/time-nuts@febo.com/msg21472.html It just left the posting off all together And on "time-nuts Digest, Vol 61, Issue 17" all was there, Text and Attachment Can anyone explain to me what's going on and how these Archives decide what to delete and ignore? Thanks, warren ***************** ----- Original Message ----- From: "WarrenS" <warrensjmail-...@yahoo.com> To: "Discussion of precise time and frequency measurement" <time-nuts@febo.com> Sent: Tuesday, August 04, 2009 8:11 AM Subject: Re: [time-nuts] Allan deviation plots etc Attachment: 56.4K, Long term Osc1.jpg >From what I have seen, Allan data has a major limitation for finding long term >aging. When you want to know what the aging will be over the next 10 years, Allan needs to have 30 or 40 years of data. Not the most practical way. I have found for long term aging, taking data at around once per month generally does a good job, IF the osc is a "good osc" Not sure if the attached under 60k plot will be seen. It is plot of actual data for 3 of my Osc over a 5 to 9 year time span. (Ref was GPS) The 10MHz SC10 shows a very consistent -8.3e-11 per day aging rate, after a two year 'warm up.' The Dana 1992 high stability option shows a less consistent +2e-10 per day rate, and the 5MHz, a small OXCO, has a Zero aging rate averaged over the last 6 years, and shows it can be pretty misleading to talk about just aging rate per year if the stability is not there. warren ******************* _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
