[time-nuts] Re: Eloran long test from now to August or September.

[JOHN HARTZELL]

One word - UrsaNav.

Kind regards,

John

https://linkedin.com/in/john-h-6a131b12/




> On Sep 24, 2023, at 7:24 PM, Bob Camp via time-nuts <time-nuts at lists.febo.com> wrote:
> 
> Hi
> 
> The issue with doing this with a low cost SDR board is not so much receiving / demodulating the
> signal. It’s a pretty good bet somebody out there has been there / done that. The issue is pulling 
> an accurate “time pulse” out of your typical SDR setup.  This is a  somewhat unusual thing to want 
> to do. Finding a “stock” setup on a low cost board that does this will be a bit of a challenge. 
> 
> Bob
> 
>> On Sep 24, 2023, at 11:47 AM, paul swed via time-nuts <time-nuts at lists.febo.com> wrote:
>> 
>> David
>> There have been various things posted in the past that have required A/Ds
>> and such. Poul here on Time-nuts did a semi software version. (I think) But
>> the fact is the old LORAN C receivers for frequency are a great way to go.
>> The only difference between LORAN C and eLORAN is the 9th pulse used as a
>> data channel. There was no 9th pulse in the old LORAN C. I have not seen
>> anything that describes the coding. It may be out there but I haven't been
>> interested in that. For many of us its an alternate very accurate Cesium
>> referenced source.
>> How it all develops if the governments supports it will be pretty
>> interesting. Certainly the old positioning is possible. The data channel
>> can provide propagation behaviors to allow for very accurate time and
>> positioning. The new generation receivers will all be SDR based.
>> I have actually seen an operational prototype numbers of years ago.
>> Regards
>> Paul
>> WB8TSL
>> 
>>> On Sun, Sep 24, 2023 at 11:04 AM David Taylor via time-nuts <
>>> time-nuts at lists.febo.com> wrote:
>>> 
>>> On 15/09/2023 14:43, john.haine--- via time-nuts wrote:
>>>> This discussion reminds me, there is one eLoran station operating in the
>>> UK,
>>>> co-located with the MSF transmitter at Anthorn, for research purposes.
>>> There is
>>>> also some discussion about licensing some new operators mainly for
>>> timing
>>>> purposes. Does anyone have any information on the coverage available
>>> from
>>>> Anthorn please? John.
>>> 
>>> Yes, I can confirm reception in Edinburgh using a Youloop antenna in an
>>> attached garage.
>>> 
>>> So, is there any sort of software decoder for the signal?  I don't have a
>>> specialised hardware receiver, just the usual SDR boxes including an
>>> Airspy HF+
>>> Discovery.
>>> 
>>> Thanks,
>>> David
>>> --
>>> SatSignal Software - Quality software for you
>>> Web: https://www.satsignal.eu
>>> Email: david-taylor at blueyonder.co.uk
>>> Twitter: @gm8arv
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