[time-nuts] Shielding a DAC line -> WWV
Hal Murray
hmurray at megapathdsl.net
Fri Sep 27 21:06:01 UTC 2013
lists at rtty.us said:
> Anything under 100 ppb relative to WWVB is probably closer than the
> ionosphere will let you get under normal conditions. You can indeed get a
> zero beat, but that's not always a guarantee that the carrier isn't moving
> around at some odd rate. Far better to use WWVB. The LF path is much more
> predictable, so you can pick "good" times to check it each day. After a few
> days you can have some pretty good information.
Or you could turn into a time nut and graph the ionosphere delay. Any long
term drift would be due to the local reference clock.
--
These are my opinions. I hate spam.
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