[time-nuts] Loran in the US

[DaveH]

Multipath propagation issues?

http://en.wikipedia.org/wiki/Multipath_propagation

We can certainly throw computational power against that wall but I think
that this would be an issue for TV stations.

AM should be better

DaveH

> -----Original Message-----
> From: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] On Behalf Of Chris Albertson
> Sent: Monday, March 05, 2012 9:27 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Loran in the US
> 
> The best and by far lowest cost solution is to pay TV stations and
> maybe AM broadcast stations to add a timing pulse a few times per
> second.  No transmitters to build.   The receivers would be more
> complete but that is OK in 2012.   In the "old days"  it was to
> expensive to put a complex computer inside a radio but now that is
> routine.    So I can imagine a receivers that can listen to 20 or 30
> broadcast stations, look of the latitude and longitude of each one and
> compute a best fit to the delays.   Actually that is how GPS works but
> only in L1
> 
> Traditionally the main problem with using comercail radios for
> navigation has been then they don't issue a station ID frequenty
> enough so you have to listen for a long time to know what station
> you've tuned.   But radio with a computer inside would know the
> station by it's frequency and the approx. location of the receiver.
> 
> 
> On Sun, Mar 4, 2012 at 1:02 PM, Charles P. Steinmetz
> <charles_steinmetz at lavabit.com> wrote:
> > Antonio wrote:
> >
> >> Now, that the Loran C ressurection seems to be probable
> >
> >
> > I suspect that it is not yet anywhere near probable -- more 
> likely there is
> > now some remote possibility of a ressurection if many difficult
> > preconditions (including Congressional action) are all met.
> >
> > Best regards,
> >
> > Charles
> >
> >
> >
> >
> >
> >
> >
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> 
> 
> -- 
> 
> Chris Albertson
> Redondo Beach, California
> 
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