[time-nuts] common mode loran comparisons

Brooke Clarke brooke at pacific.net
Sat Jun 2 20:25:27 EDT 2007


Hi Alan:

No, this is my first viewing.  That's amazing.  A newer plot that also has some 
space weather data is:
http://freenet-homepage.de/df6nm/LoranView/LoranView_0703.htm

But I doubt the phase rotation of the carrier is limited to 360 for the long 
paths so rather than showing phase in degrees maybe he could show time delay?
What is the antenna & equipment being used?

Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.precisionclock.com



Alan Melia wrote:
> Brooke I wonder if you have seen this page from a European friend of mine.
> Markus Vester DF6NM
> http://freenet-homepage.de/df6nm/LoranView/LoranView_Mar2006.htm
> Alan Melia (UK)
> G3NYK
> 
> ----- Original Message -----
> From: Brooke Clarke <brooke at pacific.net>
> To: Discussion of precise time and frequency measurement
> <time-nuts at febo.com>
> Sent: 02 June 2007 21:39
> Subject: Re: [time-nuts] common mode loran comparisons
> 
> 
> 
>>Hi Tom:
>>
>>NIST was monitoring 9940 not that long ago and I called them to ask about
> 
> the
> 
>>very poor numbers.  They said the monitoring was being done with an
> 
> antenna in
> 
>>Colorado!  So you're not missing much in that regard.
>>
>>I'm almost in the shadow of the Middletown station.  A few months ago they
> 
> were
> 
>>testing the new Data Channel, but are not now.  I've been thinking of
> 
> making up
> 
>>a PCB board for the Burhans LORAN-C receiver that was published some years
> 
> ago
> 
>>in a series of articles about LORAN-C.  It was small and has outputs that
> 
> work
> 
>>with micro controllers.  But the R.F. front end in the Austron 2100
> 
> receivers
> 
>>is far and away a much better way to go.  They have variable gain and
> 
> filtering.
> 
>>Once the modernization program is complete the timing will change from the
>>current Master -> delay -> slave to one based on UTC.  That will enable
> 
> "all in
> 
>>view" LOARN-C receivers.
>>
>>Have Fun,
>>
>>Brooke Clarke
> 
> 
> 
> 
> _______________________________________________
> time-nuts mailing list
> time-nuts at febo.com
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> 



More information about the time-nuts mailing list