[Lowfer] eLoran test July 29 - Aug 15

[craig wasson]

I did some further reading about this and it seems the test is all about
using eLoran as a timing source, not for navigation.  With only two
transmitters (M and X) I don't think a receiver can discern a location
since at best you could be at one of two (or is it 4?) points on the
hyperbolas.  And since both transmitters are at the same location I think
it would be impossible to even do that.

I'm not sure how they get accurate timing without knowing your location,
but I am not up to speed on eLoran.  Since the requirement for timing they
are targeting is at fixed locations I suppose they just program their
location into the timing receivers.  It does seem there is some movement
towards building a national eLoran-based timing network as a backup to GPS
- both commercially and via congress, with navigation maybe being added
later.

In any case it is interesting to have another signal source - at least for
the next 2 weeks.   Having a handheld unit that reports s/n ratio gives me
something to test out various antenna locations.  All of my other longwave
receivers are SDR's and not very easy to move around the yard.

I have not tried the Loran Monitor feature in Spec Lab.  I'll have to check
it out.  I may record a few hours of spectrum off the SDR for testing after
this on-the-air test ends.


Thanks - Craig, N6IO




On Wed, Aug 3, 2016 at 10:23 AM, Garry <k3siw at sbcglobal.net> wrote:

> Craig, I noticed 100 kHz was active last night and displayed it fine with
> Spec Lab using the Time Domain Scope with the Loran Monitor preset and the
> Great Lakes GRI of 8970 us. Of course that doesn't mean an old proper Loran
> receiver will make sense of the signals.
>
> 73, Garry, K3SIW, EN52ta, Elgin, IL
>
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