[time-nuts] unidentified HF time pips

Jerry Hancock jerry at hanler.com
Mon Feb 5 12:33:57 EST 2018

Ha, so I was jumping around looking for the same and found a guy on 15.016Mhz running through random characters phonetically and then signing, “this completes X characters, Horsefly out.”  What the heck was that?



Jerry Hancock
jerry at hanler.com
(415) 215-3779

> On Feb 5, 2018, at 9:18 AM, Scott Armstrong <aa5am at vntx.net> wrote:
> Hi Graham,
> I am listening to one of those "time pips"  on 30m right now. (1714 utc
> 02/05/2018).
> Frequency is 10.105.
> The best I can tell with my calibrated ears and eyes, it appears to be in
> sync with WWV. Signal strength is about a s6-7.
> I also heard this on Saturday 02/03/2018  about the same frequency but
> later in the day.
> -Scott AA5AM
> EM13sg - Blue Ridge TX
> On Sun, Feb 4, 2018 at 4:31 PM, Graham <planophore at aei.ca> wrote:
>> For some time there have been occasional reports of time pips on a number
>> HF frequencies other than the well known CHU, WWV, (etc...) signals.
>> For example 10140, 10145, 7040, 7065, 7105, 7120 kHz and likely others.
>> The pips are approximately 15 to 16ms in duration and appear to locked to
>> UTC but unlike WWV or CHU they are continuous minute by minute.
>> Assuming the pips are synchronized to UTC, simply time of arrival with all
>> of its issues on HF plus signal strength seems to indicated a source in
>> North America.
>> The frequencies and time of activity might indicate that it is some
>> amateur radio operator playing around  but it might not be, the amateur
>> 10MHz frequencies is shared with other users. The pips seem to be
>> transmitted at a fairly high power level.
>> I know there is ongoing testing of eLoran and other initiatives
>> researching GPS backup systems.
>> Anyone aware of any group doing any such testing which might be found on
>> HF like this?
>> cheers, Graham ve3gtc
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