[time-nuts] Loran in the US

[Bob Camp]

Hi

A lot depends on weather it's 50 ns right out of the spout (1 second samples
or what ever) or if it's a couple day average. There are a number of odd
things that happen with the sunrise and sunset.

Bob

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Poul-Henning Kamp
Sent: Friday, March 09, 2012 3:16 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Loran in the US

In message <9D1DABC0-AE63-4FB5-AD7D-D8C42F9FDE06 at gmail.com>, Dennis Ferguson
wr
ites:

>> If so, frequency stability is priority number one and time is
>> probably just "better than 100msec" or so
>
>I could swear I saw something that said "50 ns", though I can

You can _almost_ do that with loran, if you know your l/l coords. 

>indicates they aren't just looking at Loran by itself.  The
>MF dGPS bands and 500 kHz are also included in whatever they
>are doing.

Which indicates to me that they are pretty damn serious, and not
just catering to some recently discovered VIP Loran-C users.

I'd be very surprised if LightSquared nuking GPS reliability doesn't
have something to do with this.

-- 
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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