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Discussion of precise time and frequency measurement

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Neutrino timing

PS
paul swed
Sat, Oct 29, 2011 7:11 PM

Chris indeed 60 khz is fun but I have experienced its limitations on the
east coast way to many times. Technically speaking it sucks. ;-) Is that
technical? From a spoiled loran C user. Ahh for the old days.

But that said my experience at the higher frequencies does differ from
yours and thats why I suggested it over driving references back and forth
by car. Really looking for a common view for the 2 sites. The AM band at
these distances would be very good but I just have no idea either for TV or
AM how much a broadcaster might cooperate. Especially messing with the
bread and butter. Thank heavens not my challenge.

Though what started this thread is the neutrino thing. You have to imagine
anyone who is playing that game can afford to do some clever stuff like
renting space on a tower...
Maybe a bit O dark fiber... Maybe even a few CS references to boot. Can I
have the leftovers please?

Regards
Paul
WB8TSL/1

On Sat, Oct 29, 2011 at 11:50 AM, Chris Albertson <albertson.chris@gmail.com

wrote:

---------- Forwarded message ----------
From: Thomas A Frank ka2cdk@cox.net
Date: Fri, Oct 28, 2011 at 8:20 PM
Subject: Re: [time-nuts] Neutrino timing
To: Discussion of precise time and frequency measurement <
time-nuts@febo.com>

Perhaps take advantage of one of the numerous AM radio stations in the

midwest that happen to be about half way between?

Lets way we could build a 5,000 foot tower, nearly a mile high.  Such
a tower would have a direct line of sight out to only about 90 miles.
Yes it could transmit to greater distance but that is because the
radio wave bends, either ground waves or by refraction in the
atmosphere.  Either way the path length is not predictable.  And worse
there is likely some multi path too.

That is one of my projects, I'm slowly building tools to receive WWVB
(60KHz) and compare to "true" time.  The goal is to learn something
about the atmosphere from how the propagation delay changes.  But I
already know the delay changes and is "noisy"

Chris Albertson
Redondo Beach, California


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Chris indeed 60 khz is fun but I have experienced its limitations on the east coast way to many times. Technically speaking it sucks. ;-) Is that technical? From a spoiled loran C user. Ahh for the old days. But that said my experience at the higher frequencies does differ from yours and thats why I suggested it over driving references back and forth by car. Really looking for a common view for the 2 sites. The AM band at these distances would be very good but I just have no idea either for TV or AM how much a broadcaster might cooperate. Especially messing with the bread and butter. Thank heavens not my challenge. Though what started this thread is the neutrino thing. You have to imagine anyone who is playing that game can afford to do some clever stuff like renting space on a tower... Maybe a bit O dark fiber... Maybe even a few CS references to boot. Can I have the leftovers please? Regards Paul WB8TSL/1 On Sat, Oct 29, 2011 at 11:50 AM, Chris Albertson <albertson.chris@gmail.com > wrote: > ---------- Forwarded message ---------- > From: Thomas A Frank <ka2cdk@cox.net> > Date: Fri, Oct 28, 2011 at 8:20 PM > Subject: Re: [time-nuts] Neutrino timing > To: Discussion of precise time and frequency measurement < > time-nuts@febo.com> > > > > Perhaps take advantage of one of the numerous AM radio stations in the > midwest that happen to be about half way between? > > > Lets way we could build a 5,000 foot tower, nearly a mile high. Such > a tower would have a direct line of sight out to only about 90 miles. > Yes it could transmit to greater distance but that is because the > radio wave bends, either ground waves or by refraction in the > atmosphere. Either way the path length is not predictable. And worse > there is likely some multi path too. > > That is one of my projects, I'm slowly building tools to receive WWVB > (60KHz) and compare to "true" time. The goal is to learn something > about the atmosphere from how the propagation delay changes. But I > already know the delay changes and is "noisy" > -- > > Chris Albertson > Redondo Beach, California > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. >
CA
Chris Albertson
Sun, Oct 30, 2011 12:28 AM

On Sat, Oct 29, 2011 at 12:11 PM, paul swed paulswedb@gmail.com wrote:

Chris indeed 60 khz is fun but I have experienced its limitations on the
east coast way to many times. Technically speaking it sucks. ;-) Is that
technical? From a spoiled loran C user. Ahh for the old days.

It sucks for timing.  But my goal is to study the just how poor it is.
The "poorness" tells something about the propagation path or so I
hope.  I brought this up to counter the suggestion to use AM radio.
It would be very poor, far worse then simply buying a $200
Thunderbolt.

Chris Albertson
Redondo Beach, California

On Sat, Oct 29, 2011 at 12:11 PM, paul swed <paulswedb@gmail.com> wrote: > Chris indeed 60 khz is fun but I have experienced its limitations on the > east coast way to many times. Technically speaking it sucks. ;-) Is that > technical? From a spoiled loran C user. Ahh for the old days. It sucks for timing. But my goal is to study the just how poor it is. The "poorness" tells something about the propagation path or so I hope. I brought this up to counter the suggestion to use AM radio. It would be very poor, far worse then simply buying a $200 Thunderbolt. Chris Albertson Redondo Beach, California
PS
paul swed
Sun, Oct 30, 2011 1:08 AM

Right but they have that ability and its not good enough.
The alternative was to run a CS back and forth by a car over 400 miles.
Indeed I do watch wwvb propagation from the east coast. Its interesting to
see it shift around and other crazy things like suddenly dropping through
the floor.

On Sat, Oct 29, 2011 at 8:28 PM, Chris Albertson
albertson.chris@gmail.comwrote:

On Sat, Oct 29, 2011 at 12:11 PM, paul swed paulswedb@gmail.com wrote:

Chris indeed 60 khz is fun but I have experienced its limitations on the
east coast way to many times. Technically speaking it sucks. ;-) Is that
technical? From a spoiled loran C user. Ahh for the old days.

It sucks for timing.  But my goal is to study the just how poor it is.
The "poorness" tells something about the propagation path or so I
hope.  I brought this up to counter the suggestion to use AM radio.
It would be very poor, far worse then simply buying a $200
Thunderbolt.

Chris Albertson
Redondo Beach, California


time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Right but they have that ability and its not good enough. The alternative was to run a CS back and forth by a car over 400 miles. Indeed I do watch wwvb propagation from the east coast. Its interesting to see it shift around and other crazy things like suddenly dropping through the floor. On Sat, Oct 29, 2011 at 8:28 PM, Chris Albertson <albertson.chris@gmail.com>wrote: > On Sat, Oct 29, 2011 at 12:11 PM, paul swed <paulswedb@gmail.com> wrote: > > Chris indeed 60 khz is fun but I have experienced its limitations on the > > east coast way to many times. Technically speaking it sucks. ;-) Is that > > technical? From a spoiled loran C user. Ahh for the old days. > > It sucks for timing. But my goal is to study the just how poor it is. > The "poorness" tells something about the propagation path or so I > hope. I brought this up to counter the suggestion to use AM radio. > It would be very poor, far worse then simply buying a $200 > Thunderbolt. > > > Chris Albertson > Redondo Beach, California > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. >
CA
Chris Albertson
Sun, Oct 30, 2011 6:23 PM

On Sat, Oct 29, 2011 at 6:08 PM, paul swed paulswedb@gmail.com wrote:

Right but they have that ability and its not good enough.
The alternative was to

It may very likely be good enough.  Lots of people think they got it
right.  They either have a 60nS timing error which would be huge even
for many home labs or neutrinos really are fast

The goal now is to prove that it's right, or not.  The 60nS anomaly
may very well be a fact of nature.  My guess is that the path length
for neutrinos is shorter than the path length for photons.  Or should
I say the "path length when projected onto there dimensions" is
shorter.

Chris Albertson
Redondo Beach, California

On Sat, Oct 29, 2011 at 6:08 PM, paul swed <paulswedb@gmail.com> wrote: > Right but they have that ability and its not good enough. > The alternative was to It may very likely be good enough. Lots of people think they got it right. They either have a 60nS timing error which would be huge even for many home labs or neutrinos really are fast The goal now is to prove that it's right, or not. The 60nS anomaly may very well be a fact of nature. My guess is that the path length for neutrinos is shorter than the path length for photons. Or should I say the "path length when projected onto there dimensions" is shorter. Chris Albertson Redondo Beach, California