[time-nuts] eLORAN in the Antipodes ? (was: Re: eLORAN will be on the air GRI 99600)

[Bob kb8tq]

Hi

The idea is that over a limited coverage area, you can supply “correction” info to reduce the impact
of propagation. GPS (and other GNSS systems) do this sort of thing already. Just as with GNSS, the
corrections will (likely) only get you just so far.

Bob

> On Aug 7, 2020, at 11:32 AM, Taka Kamiya via time-nuts <time-nuts at lists.febo.com> wrote:
> 
> Wouldn't such a long distance propagation result in less precision?  The signal will have to go through distance through air which isn't constant in dialectic values.  Wouldn't it be problematic for level of accuracy we pursue?
> 
> --------------------------------------- 
> (Mr.) Taka Kamiya
> KB4EMF / ex JF2DKG
> 
> 
>    On Friday, August 7, 2020, 9:14:23 AM EDT, paul swed <paulswedb at gmail.com> wrote:  
> 
> I believe South Korea is indeed building new eLORAN chains. I have seen
> mention of it.
> With respect to distance In the US I could occasionally receive the
> European West chain at night and in the winter. Thats about 3200 miles. It
> would also be by skywave so that deteriorates accuracy.
> Regards
> Paul
> WB8TSL
> 
> On Fri, Aug 7, 2020 at 5:26 AM Björn <bg at lysator.liu.se> wrote:
> 
>> Are not South Korea are building one? new eLoran chain?  Are they
>> transmitting? But don’t underestimate the distances from south east Asia to
>> the far side of Australia.
>> 
>> /Björn
>> 
>> Sent from my iPhone
>> 
>>> On 7 Aug 2020, at 10:24, Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:
>>> 
>>> --------
>>> Hugh Blemings writes:
>>> 
>>>> Been following this thread with the usual mixture of joy, awe and
>> wonder
>>>> (truly!) - fantastic stuff :)
>>>> 
>>>> My read of the situation is that there is next to no chance of
>> receiving
>>>> any meaningful signal at the VLF frequencies in question down here in
>>>> Melbourne - a great circle path of some 10,000 mi / 16000 km ?
>>> 
>>> You might be able to pick out the Chinese Loran chains, I believe
>> they're still up.
>>> 
>>> (Use sdr.dh web-sdr's to find out ?)
>>> 
>>> --
>>> Poul-Henning Kamp      | UNIX since Zilog Zeus 3.20
>>> phk at FreeBSD.ORG        | TCP/IP since RFC 956
>>> FreeBSD committer      | BSD since 4.3-tahoe
>>> Never attribute to malice what can adequately be explained by
>> incompetence.
>>> 
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