[time-nuts] Re: long term eLORAN time-transfer monitoring results?

[Bob Camp]

Hi

There’s a lot of data on Loran propagation from “back in the day”. Start digging in around 1960 or so and you should turn up a number of papers. Propagation for eLoran is no different than the good old Loran-C signals. 

Simple answer: Back when we used it for timing, you picked a time of day. You looked at things “at that time” each day. The same “pick a time of day" was true for WWVB. The main advantage for Loran was more stations ment you might be able to find a shorter path from you to the station you used. Something around midnight or noon generally were popular choices for “that time”.

Bob

> On Jul 31, 2025, at 10:28 AM, jeanmichel.friedt--- via time-nuts <time-nuts at lists.febo.com> wrote:
> 
> After reading again https://febo.com/pipermail/time-nuts_lists.febo.com/2023-May/107744.html
> I was wondering if anyone had some long term (> 1 month) record of time transfer over eLoRAN,
> especially how day/night ionosphere impacts the 100 kHz delay, and how the eLORAN station
> oscillators are disciplined.
> 
> Thanks, Jean-Michel
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