[time-nuts] Loran C returning to a station near you...

Poul-Henning Kamp phk at phk.freebsd.dk
Thu Jul 16 02:13:51 EDT 2015


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In message <07538A701D6E4F8D804BD567DD794693 at gnat>, "Alan Melia" writes:

I mean that a Loran-C signal designed as I proposed in a previous
email would not do that, because it wouldn't have the groups and
GRI-peridodicties which cause the splatter up and down the band.

>It just depends what you mean by that :-) I could lock to Lessay and Anthorn 
>at frequencies in the 136kHz amateur band, using some S/N DSP software 
>writen by Peter Matinez G3PLX.

>>>If you look at the spectral width of the existing Loran-C (or
>>>similar) waveform, it’s a massive thing. You would have a hard time
>>>coming up with something that spreads more crud around the VLF range.
>>
>> The reason Loran-C "spreads crud" is *only* the combinationa of the
>> pulse-groups and the periodicity of the GRI.
>>
>> The pulses themselves are entirely contained inside the allocated
>> frequency band.


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Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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