Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV), with 5071A cesium clocks

[Bob Stewart]

If you're using someone else's clock (e.g. GPS time) then it doesn't matter 
what's happening to you, you'll only know what you see on that clock.  But, if 
you have your own clock (e.g. an HP 5071A) on your person, and can compare it 
to someone else's clock, then assuming both clocks are accurate enough, you can 
see any difference in the rate of time you are experiencing vs the other person.

Bob

On Fri, 5/20/16, Peter Reilley <preilley_...@comcast.net> wrote:

 Subject: Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV), with 5071A cesium 
clocks
 To: "Discussion of precise time and frequency measurement" <time-nuts@febo.com>
 Date: Friday, May 20, 2016, 10:24 AM
 
 I have a
 question.   I, of small brain, am wondering: if
 the time 
 difference between the
 top of the mountain and the bottom of the
 mountain is 20 nS over 24 
 hours could
 you
 repeat the same experiment using GPS? 
   The time difference of 20 nS is 
 measurable
 using GPS.
 
 The GPS clock must run faster
 on the mountain top than the GPS at the 
 mountain
 base and yet the two
 remain synchronized to the satellite
 reference.   
 Therefore
 the GPS 1 PPS signal (measurable to a few nS)
 must be wrong in in one of 
 the local
 frame references.
 
 My brain hurts.
 
 Pete.
 
 
 On 5/20/2016 10:16 AM, Bob Camp wrote:
 > Hi
 >
 > Ok, so *that* link got me to the episode.
 Very impressive stuff. Well done !!!
 >
 > Bob
 >
 >
 >> On May 20, 2016,
 at 2:04 AM, Tom Van Baak <t...@leapsecond.com>
 wrote:
 >>
 >> For
 those of you who missed the live TV broadcast, I'm told
 PBS has a live stream:
 >> http://www.pbs.org/video/2365757267/
 >>
 >> The cesium
 clock parts are in the last 15 minutes of the show.
 >> I also added more photos/plots to:
 >> http://leapsecond.com/great2016a/photos.htm
 >>
 >> /tvb
 >>
 ___
 >> 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.
 >
 ___
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 >
 
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Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV), with 5071A cesium clocks

[Bob Camp]

Hi

There is a (possibly bogus) story from the early days of GPS:

The Cesium standards were specified with a tuning range of X. That all was fine 
on earth. The gotcha was
that the frequency change in orbit was a significant percentage of X. Simply 
put, the guys who did the 
spec “didn’t believe” in relativity (or at least didn’t do the math). When this 
all came up a crash course 
in physics was arranged and the spec was changed. 

Bob


> On May 20, 2016, at 1:00 PM, Tom Van Baak <t...@leapsecond.com> wrote:
> 
> Hi Peter,
> 
> Good question. And, yes, it would work to use GPS.
> 
> But we don't do it that way because it's a poor physics demonstration to use 
> a highly complex system that *already* takes relativity, propagation delay, 
> gravity and elevation into account (GPS) as a tool to then "detect" 
> relativistic effects in a portable cesium clock at high altitude.
> 
> The clearest demonstration, one free from needing to know anything or 
> everything about GPS, one that avoids circular proof, is just to use two 
> identical synchronized portable clocks. So that's why and what we did.
> 
> Alternatively, a really nice *thought* experiment is -- if your GPS receiver 
> firmware, and if the entire DoD infrastructure eliminated all notions of 
> relativity for one day. Everyone would then get a wonderful lesson on why 
> relativity is important in a satellite-based PNT system like GPS. Hint: it 
> would screw up 1PPS timing and UTC by tens of microseconds, but as far as I 
> can tell, it would distort positioning only by a small fraction of a meter.
> 
> The nearest we have to this thought experiment was the pre-GPS experiment 
> done with NTS-2 in 1977. Read, or at least look at the plots at the end of:
> http://leapsecond.com/history/Ashby-Relativity.htm
> http://leapsecond.com/history/1978-PTTI-v9-NTS-2.pdf
> 
> /tvb
> 
> - Original Message - 
> From: "Peter Reilley" <preilley_...@comcast.net>
> To: "Discussion of precise time and frequency measurement" 
> <time-nuts@febo.com>
> Sent: Friday, May 20, 2016 8:24 AM
> Subject: Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV), with 5071A 
> cesium clocks
> 
> 
>> I have a question.   I, of small brain, am wondering: if the time 
>> difference between the
>> top of the mountain and the bottom of the mountain is 20 nS over 24 
>> hours could you
>> repeat the same experiment using GPS?The time difference of 20 nS is 
>> measurable
>> using GPS.
>> 
>> The GPS clock must run faster on the mountain top than the GPS at the 
>> mountain
>> base and yet the two remain synchronized to the satellite reference.   
>> Therefore
>> the GPS 1 PPS signal (measurable to a few nS) must be wrong in in one of 
>> the local
>> frame references.
>> 
>> My brain hurts.
>> 
>> Pete.
>> 
> 
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Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV), with 5071A cesium clocks

[Bob Camp]

Hi

A GPS receiver is simply picking up the time information from the orbital 
system. The satellites 
do not change height when you move around, thus their reported time does not 
change either. 
Coming up with 20 ns from GPS involves a lot of post processing, that’s not 
going to play very
well on prime time TV. There’s just to much handwaving. Moving real clocks is 
much more convincing. 

Bob

> On May 20, 2016, at 11:24 AM, Peter Reilley  wrote:
> 
> I have a question.   I, of small brain, am wondering: if the time difference 
> between the
> top of the mountain and the bottom of the mountain is 20 nS over 24 hours 
> could you
> repeat the same experiment using GPS?The time difference of 20 nS is 
> measurable
> using GPS.
> 
> The GPS clock must run faster on the mountain top than the GPS at the mountain
> base and yet the two remain synchronized to the satellite reference.   
> Therefore
> the GPS 1 PPS signal (measurable to a few nS) must be wrong in in one of the 
> local
> frame references.
> 
> My brain hurts.
> 
> Pete.
> 
> 
> On 5/20/2016 10:16 AM, Bob Camp wrote:
>> Hi
>> 
>> Ok, so *that* link got me to the episode. Very impressive stuff. Well done 
>> !!!
>> 
>> Bob
>> 
>> 
>>> On May 20, 2016, at 2:04 AM, Tom Van Baak  wrote:
>>> 
>>> For those of you who missed the live TV broadcast, I'm told PBS has a live 
>>> stream:
>>> http://www.pbs.org/video/2365757267/
>>> 
>>> The cesium clock parts are in the last 15 minutes of the show.
>>> I also added more photos/plots to:
>>> http://leapsecond.com/great2016a/photos.htm
>>> 
>>> /tvb
>>> ___
>>> 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.
>> ___
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>> and follow the instructions there.
>> 
> 
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Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV), with 5071A cesium clocks

[Hal Murray]

preilley_...@comcast.net said:
> I have a question.   I, of small brain, am wondering: if the time
> difference between the top of the mountain and the bottom of the mountain is
> 20 nS over 24  hours could you repeat the same experiment using GPS?The
> time difference of 20 nS is  measurable using GPS. 

The experiment has already been run.  (is being run?)

The GPS satellites are much higher than any mountain.  Their clocks are 
adjusted so that they will be the right frequency when the signal gets down 
here.  There are actually two corrections, one each for special and general 
relativity.  One is 45 microseconds per day, the other is 7 microseconds per 
day in the other direction.


preilley_...@comcast.net said:
> The GPS clock must run faster on the mountain top than the GPS at the
> mountain base and yet the two remain synchronized to the satellite
> reference.Therefore the GPS 1 PPS signal (measurable to a few nS) must
> be wrong in in one of  the local frame references. 

If you adjusted a clock on the mountain top to track GPS, then brought it 
down to the lab at the bottom, it would run at a slightly different frequency.


-- 
These are my opinions.  I hate spam.



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Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV), with 5071A cesium clocks

[Edesio Costa e Silva]

I believe not. 20 nS is about 6 meters error in height. I would need to know
the height difference much better than this to have an accurate measurement.

Edésio

On Fri, May 20, 2016 at 11:24:42AM -0400, Peter Reilley wrote:
> I have a question.   I, of small brain, am wondering: if the time difference
> between the
> top of the mountain and the bottom of the mountain is 20 nS over 24 hours
> could you
> repeat the same experiment using GPS?The time difference of 20 nS is
> measurable
> using GPS.
> 
> The GPS clock must run faster on the mountain top than the GPS at the
> mountain
> base and yet the two remain synchronized to the satellite reference.
> Therefore
> the GPS 1 PPS signal (measurable to a few nS) must be wrong in in one of the
> local
> frame references.
> 
> My brain hurts.
> 
> Pete.
> 
> 
> On 5/20/2016 10:16 AM, Bob Camp wrote:
> >Hi
> >
> >Ok, so *that* link got me to the episode. Very impressive stuff. Well done 
> >!!!
> >
> >Bob
> >
> >
> >>On May 20, 2016, at 2:04 AM, Tom Van Baak  wrote:
> >>
> >>For those of you who missed the live TV broadcast, I'm told PBS has a live 
> >>stream:
> >>http://www.pbs.org/video/2365757267/
> >>
> >>The cesium clock parts are in the last 15 minutes of the show.
> >>I also added more photos/plots to:
> >>http://leapsecond.com/great2016a/photos.htm
> >>
> >>/tvb
> >>___
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> >>and follow the instructions there.
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> >and follow the instructions there.
> >
> 
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Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV), with 5071A cesium clocks

[Tom Van Baak]

Hi Peter,

Good question. And, yes, it would work to use GPS.

But we don't do it that way because it's a poor physics demonstration to use a 
highly complex system that *already* takes relativity, propagation delay, 
gravity and elevation into account (GPS) as a tool to then "detect" 
relativistic effects in a portable cesium clock at high altitude.

The clearest demonstration, one free from needing to know anything or 
everything about GPS, one that avoids circular proof, is just to use two 
identical synchronized portable clocks. So that's why and what we did.

Alternatively, a really nice *thought* experiment is -- if your GPS receiver 
firmware, and if the entire DoD infrastructure eliminated all notions of 
relativity for one day. Everyone would then get a wonderful lesson on why 
relativity is important in a satellite-based PNT system like GPS. Hint: it 
would screw up 1PPS timing and UTC by tens of microseconds, but as far as I can 
tell, it would distort positioning only by a small fraction of a meter.

The nearest we have to this thought experiment was the pre-GPS experiment done 
with NTS-2 in 1977. Read, or at least look at the plots at the end of:
http://leapsecond.com/history/Ashby-Relativity.htm
http://leapsecond.com/history/1978-PTTI-v9-NTS-2.pdf

/tvb

- Original Message - 
From: "Peter Reilley" <preilley_...@comcast.net>
To: "Discussion of precise time and frequency measurement" <time-nuts@febo.com>
Sent: Friday, May 20, 2016 8:24 AM
Subject: Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV), with 5071A cesium 
clocks


> I have a question.   I, of small brain, am wondering: if the time 
> difference between the
> top of the mountain and the bottom of the mountain is 20 nS over 24 
> hours could you
> repeat the same experiment using GPS?The time difference of 20 nS is 
> measurable
> using GPS.
> 
> The GPS clock must run faster on the mountain top than the GPS at the 
> mountain
> base and yet the two remain synchronized to the satellite reference.   
> Therefore
> the GPS 1 PPS signal (measurable to a few nS) must be wrong in in one of 
> the local
> frame references.
> 
> My brain hurts.
> 
> Pete.
> 

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Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV), with 5071A cesium clocks

[Clint Jay]

To  my simple mind they'd be out but by a constant amount because they're
still locked to one master clock.   The discrepancy would be from the "time
of flight"  between the top and bottom of the mountain.

Or I may have completely misunderstood.
On 20 May 2016 17:01, "Peter Reilley"  wrote:

> I have a question.   I, of small brain, am wondering: if the time
> difference between the
> top of the mountain and the bottom of the mountain is 20 nS over 24 hours
> could you
> repeat the same experiment using GPS?The time difference of 20 nS is
> measurable
> using GPS.
>
> The GPS clock must run faster on the mountain top than the GPS at the
> mountain
> base and yet the two remain synchronized to the satellite reference.
>  Therefore
> the GPS 1 PPS signal (measurable to a few nS) must be wrong in in one of
> the local
> frame references.
>
> My brain hurts.
>
> Pete.
>
>
> On 5/20/2016 10:16 AM, Bob Camp wrote:
>
>> Hi
>>
>> Ok, so *that* link got me to the episode. Very impressive stuff. Well
>> done !!!
>>
>> Bob
>>
>>
>> On May 20, 2016, at 2:04 AM, Tom Van Baak  wrote:
>>>
>>> For those of you who missed the live TV broadcast, I'm told PBS has a
>>> live stream:
>>> http://www.pbs.org/video/2365757267/
>>>
>>> The cesium clock parts are in the last 15 minutes of the show.
>>> I also added more photos/plots to:
>>> http://leapsecond.com/great2016a/photos.htm
>>>
>>> /tvb
>>> ___
>>> 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.
>>>
>> ___
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>> and follow the instructions there.
>>
>>
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>
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Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV), with 5071A cesium clocks

[Peter Reilley]

I have a question.   I, of small brain, am wondering: if the time 
difference between the
top of the mountain and the bottom of the mountain is 20 nS over 24 
hours could you
repeat the same experiment using GPS?The time difference of 20 nS is 
measurable

using GPS.

The GPS clock must run faster on the mountain top than the GPS at the 
mountain
base and yet the two remain synchronized to the satellite reference.   
Therefore
the GPS 1 PPS signal (measurable to a few nS) must be wrong in in one of 
the local

frame references.

My brain hurts.

Pete.


On 5/20/2016 10:16 AM, Bob Camp wrote:

Hi

Ok, so *that* link got me to the episode. Very impressive stuff. Well done !!!

Bob



On May 20, 2016, at 2:04 AM, Tom Van Baak  wrote:

For those of you who missed the live TV broadcast, I'm told PBS has a live 
stream:
http://www.pbs.org/video/2365757267/

The cesium clock parts are in the last 15 minutes of the show.
I also added more photos/plots to:
http://leapsecond.com/great2016a/photos.htm

/tvb
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Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV), with 5071A cesium clocks

[Bob Camp]

Hi

Ok, so *that* link got me to the episode. Very impressive stuff. Well done !!!

Bob


> On May 20, 2016, at 2:04 AM, Tom Van Baak  wrote:
> 
> For those of you who missed the live TV broadcast, I'm told PBS has a live 
> stream:
> http://www.pbs.org/video/2365757267/
> 
> The cesium clock parts are in the last 15 minutes of the show.
> I also added more photos/plots to:
> http://leapsecond.com/great2016a/photos.htm
> 
> /tvb
> ___
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Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV), with 5071A cesium clocks

[Dan Rae]

I have a recording of this on my hard drive, at1.3 Gb it's too big to 
email but I can share it via Wetransfer if anyone wants it.  I would 
need a recipient's email address to do this.


Dan
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Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV), with 5071A cesium clocks

[Tom Van Baak]

For those of you who missed the live TV broadcast, I'm told PBS has a live 
stream:
http://www.pbs.org/video/2365757267/

The cesium clock parts are in the last 15 minutes of the show.
I also added more photos/plots to:
http://leapsecond.com/great2016a/photos.htm

/tvb
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Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV), with 5071A cesium clocks

[Eric Scace]

For those of us who do not have TVs, pointers to an Internet source for viewing 
the show would be welcomed. Thanks!


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Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV), with 5071A cesium clocks

[John Miles]

Public service announcement: I just tried to stream this episode on Amazon 
Prime Video, and it seems they have some sort of indexing snafu going on.  They 
offer episode 1 ("Can We Time-Travel?") and episode 2 ("Are We Alone?") for 
viewing, but what actually played when I selected them were two completely 
unrelated/unannounced episodes.  The first episode is on the size of the Earth, 
solar system and Universe, and the second one discusses abiogenesis and 
evolution.

Both episodes are worth the $2.99 price of entry IMO, but there are a grand 
total of zero 5071As in either of them. 

-- john, KE5FX
Miles Design LLC
 
> Anyway, I'll see if the videos appear somewhere on the internet some
> time. ;-)
> 
> Martin

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Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV), with 5071A cesium clocks

[jmfranke]

Well done Tom! As always, you represented the Time-Nuts community in a most 
professional manner. 

John  WA4WDL
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Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV), with 5071A cesium clocks

[Poul-Henning Kamp]

In message , "Bill Hawkins" writes:

>Meanwhile, here I am on the third floor of a retirement community,
>possibly living faster than those on the first floor.
>Not that it approaches a significant fraction of a second per year; it's
>the principle of the thing.

Dont knock it, mathematically speaking, your relative benefit of
difference will go asymptotically against infinity over time.

-- 
Poul-Henning Kamp   | UNIX since Zilog Zeus 3.20
p...@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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Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV), with 5071A cesium clocks

[Rex]

I just watched it on PBS. Nicely done recreation of your GREAT 
experiment, Tom. Good to see you had a couple personal appearances, and 
especially for the final results.


Looks like your SR620 counter had a hyperdrive undercarriage lighting 
option. :-)




On 5/17/2016 7:50 PM, Tom Van Baak wrote:

The TV show is tomorrow, Wednesday evening. 8/9 PM, or something like that.

Here are fresh web pages with background information, photos, and plots:

http://leapsecond.com/great2016a/

http://leapsecond.com/great2016a/photos.htm

I have no idea how minor my role is in the actual TV episode, but if nothing 
else, the above two pages will share some time nuts sort of details of the 
clock experiment itself. If you have any questions let me know.

/tvb

- Original Message -
From: "Tom Van Baak" <t...@leapsecond.com>
To: "Discussion of precise time and frequency measurement" <time-nuts@febo.com>
Sent: Friday, May 13, 2016 12:00 PM
Subject: [time-nuts] GENIUS by Stephen Hawking (PBS TV),with 5071A cesium clocks


Fellow time nuts,

Here in the US, a new six-part TV series on National Geographic / PBS starts next 
Wednesday, May 18th, 2016. The title is "Genius by Stephen Hawking" and episode 
1 is: Can We Time Travel?

Having not seen it yet, I can't make a promise of its "SNR" (Science to 
Nonsense Ratio). It might be quite educational, or at least, very entertaining. And I'm 
definitely going to watch it with my family.

So why do I mention this?

Well, I spent most of December 2015 and January 2016 working with the UK-based 
producers of the show -- in order to pull off another Einstein 100th 
anniversary, general relativity, cesium atomic clock, gravitational time 
dilation experiment. The location chosen was 9000+ foot Mt Lemmon, near Tucson, 
Arizona.

The Hawking series covers a wide variety of topics, and this atomic clock bit 
is just one very small part. They were inspired by the DIY experiment I did ( 
http://leapsecond.com/great2005/tour/ ) and they wanted to create and film 
something similar. So I offered to help. Scenes with (me? and) my 5071A cesium 
clocks and hp 53132A / SR620 time interval counters are in episode 1.

The PR link to the episode is:

http://www.pbs.org/genius-by-stephen-hawking/episodes/episode-1/

Attached is a photo. I will post lots of technical info, plots, photos and FAQ 
here next week:

http://leapsecond.com/great2016a/

/tvb
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Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV), with 5071A cesium clocks

[Bill Hawkins]

Well, Tom, you did get an active part in the show, and Stephen Hawking
credited your worldwide reputation. Wow.

You even sounded as natural as the actors used to give emotional depth
to a science story.

What troubles me is that we have the instruments to detect a 20
nanosecond difference in atomic clocks, but we have no way of measuring
the effect on living cells. At least, not until we have devices that
will transport us near the speed of light.

Meanwhile, here I am on the third floor of a retirement community,
possibly living faster than those on the first floor.
Not that it approaches a significant fraction of a second per year; it's
the principle of the thing.

:-)

Bill Hawkins

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Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV), with 5071A cesium clocks

[Wes]

Congratulations Tom,

I'm a lurker here and learn something every day.  I'm also in Tucson and have 
spent a lot of time on Mt. Lemmon so that hook is really cool.


My recorder is all set.  Locally on PBS at 9PM.

Wes  N7WS

On 5/17/2016 7:50 PM, Tom Van Baak wrote:

The TV show is tomorrow, Wednesday evening. 8/9 PM, or something like that.

Here are fresh web pages with background information, photos, and plots:

http://leapsecond.com/great2016a/

http://leapsecond.com/great2016a/photos.htm

I have no idea how minor my role is in the actual TV episode, but if nothing 
else, the above two pages will share some time nuts sort of details of the 
clock experiment itself. If you have any questions let me know.

/tvb

- Original Message -
From: "Tom Van Baak" <t...@leapsecond.com>
To: "Discussion of precise time and frequency measurement" <time-nuts@febo.com>
Sent: Friday, May 13, 2016 12:00 PM
Subject: [time-nuts] GENIUS by Stephen Hawking (PBS TV),with 5071A cesium clocks


Fellow time nuts,

Here in the US, a new six-part TV series on National Geographic / PBS starts next 
Wednesday, May 18th, 2016. The title is "Genius by Stephen Hawking" and episode 
1 is: Can We Time Travel?

Having not seen it yet, I can't make a promise of its "SNR" (Science to 
Nonsense Ratio). It might be quite educational, or at least, very entertaining. And I'm 
definitely going to watch it with my family.

So why do I mention this?

Well, I spent most of December 2015 and January 2016 working with the UK-based 
producers of the show -- in order to pull off another Einstein 100th 
anniversary, general relativity, cesium atomic clock, gravitational time 
dilation experiment. The location chosen was 9000+ foot Mt Lemmon, near Tucson, 
Arizona.

The Hawking series covers a wide variety of topics, and this atomic clock bit 
is just one very small part. They were inspired by the DIY experiment I did ( 
http://leapsecond.com/great2005/tour/ ) and they wanted to create and film 
something similar. So I offered to help. Scenes with (me? and) my 5071A cesium 
clocks and hp 53132A / SR620 time interval counters are in episode 1.

The PR link to the episode is:

http://www.pbs.org/genius-by-stephen-hawking/episodes/episode-1/

Attached is a photo. I will post lots of technical info, plots, photos and FAQ 
here next week:

http://leapsecond.com/great2016a/

/tvb
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Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV), with 5071A cesium clocks

[Don Lewis]

Congratulations, Tom, on a successful experiment.  You should feel very 
proud.


I have seen the promotions for the BBC episode and was looking forward to 
it, but now, ... I am really excited!


I continue to learn and be educated from your Time-Nuts site (and you!).  I 
thank you for your ownership and leadership of the Group.


Job well done.

Don
N5CID








-Original Message- 
From: Tom Van Baak

Sent: Tuesday, May 17, 2016 9:50 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV),with 5071A 
cesium clocks


The TV show is tomorrow, Wednesday evening. 8/9 PM, or something like that.

Here are fresh web pages with background information, photos, and plots:

http://leapsecond.com/great2016a/

http://leapsecond.com/great2016a/photos.htm

I have no idea how minor my role is in the actual TV episode, but if nothing 
else, the above two pages will share some time nuts sort of details of the 
clock experiment itself. If you have any questions let me know.


/tvb

- Original Message - 
From: "Tom Van Baak" <t...@leapsecond.com>
To: "Discussion of precise time and frequency measurement" 
<time-nuts@febo.com>

Sent: Friday, May 13, 2016 12:00 PM
Subject: [time-nuts] GENIUS by Stephen Hawking (PBS TV),with 5071A cesium 
clocks



Fellow time nuts,

Here in the US, a new six-part TV series on National Geographic / PBS starts 
next Wednesday, May 18th, 2016. The title is "Genius by Stephen Hawking" and 
episode 1 is: Can We Time Travel?


Having not seen it yet, I can't make a promise of its "SNR" (Science to 
Nonsense Ratio). It might be quite educational, or at least, very 
entertaining. And I'm definitely going to watch it with my family.


So why do I mention this?

Well, I spent most of December 2015 and January 2016 working with the 
UK-based producers of the show -- in order to pull off another Einstein 
100th anniversary, general relativity, cesium atomic clock, gravitational 
time dilation experiment. The location chosen was 9000+ foot Mt Lemmon, near 
Tucson, Arizona.


The Hawking series covers a wide variety of topics, and this atomic clock 
bit is just one very small part. They were inspired by the DIY experiment I 
did ( http://leapsecond.com/great2005/tour/ ) and they wanted to create and 
film something similar. So I offered to help. Scenes with (me? and) my 5071A 
cesium clocks and hp 53132A / SR620 time interval counters are in episode 1.


The PR link to the episode is:

http://www.pbs.org/genius-by-stephen-hawking/episodes/episode-1/

Attached is a photo. I will post lots of technical info, plots, photos and 
FAQ here next week:


http://leapsecond.com/great2016a/

/tvb
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Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV), with 5071A cesium clocks

[Martin Burnicki]

Hi Tom,

Tom Van Baak wrote:
> The TV show is tomorrow, Wednesday evening. 8/9 PM, or something like that.
> 
> Here are fresh web pages with background information, photos, and plots:
> 
> http://leapsecond.com/great2016a/
> 
> http://leapsecond.com/great2016a/photos.htm
> 
> I have no idea how minor my role is in the actual TV episode, but if nothing 
> else, the above two pages will share some time nuts sort of details of the 
> clock experiment itself. If you have any questions let me know.

Very nice stuff, and great that you've been involved in the show.
Unfortunately it looks like I can't watch the episodes here in Germany. :-(

Anyway, I'll see if the videos appear somewhere on the internet some
time. ;-)

Martin

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Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV), with 5071A cesium clocks

[Tom Van Baak]

The TV show is tomorrow, Wednesday evening. 8/9 PM, or something like that.

Here are fresh web pages with background information, photos, and plots:

http://leapsecond.com/great2016a/

http://leapsecond.com/great2016a/photos.htm

I have no idea how minor my role is in the actual TV episode, but if nothing 
else, the above two pages will share some time nuts sort of details of the 
clock experiment itself. If you have any questions let me know.

/tvb

- Original Message - 
From: "Tom Van Baak" <t...@leapsecond.com>
To: "Discussion of precise time and frequency measurement" <time-nuts@febo.com>
Sent: Friday, May 13, 2016 12:00 PM
Subject: [time-nuts] GENIUS by Stephen Hawking (PBS TV),with 5071A cesium clocks


Fellow time nuts,

Here in the US, a new six-part TV series on National Geographic / PBS starts 
next Wednesday, May 18th, 2016. The title is "Genius by Stephen Hawking" and 
episode 1 is: Can We Time Travel?

Having not seen it yet, I can't make a promise of its "SNR" (Science to 
Nonsense Ratio). It might be quite educational, or at least, very entertaining. 
And I'm definitely going to watch it with my family.

So why do I mention this?

Well, I spent most of December 2015 and January 2016 working with the UK-based 
producers of the show -- in order to pull off another Einstein 100th 
anniversary, general relativity, cesium atomic clock, gravitational time 
dilation experiment. The location chosen was 9000+ foot Mt Lemmon, near Tucson, 
Arizona.

The Hawking series covers a wide variety of topics, and this atomic clock bit 
is just one very small part. They were inspired by the DIY experiment I did ( 
http://leapsecond.com/great2005/tour/ ) and they wanted to create and film 
something similar. So I offered to help. Scenes with (me? and) my 5071A cesium 
clocks and hp 53132A / SR620 time interval counters are in episode 1.

The PR link to the episode is:

http://www.pbs.org/genius-by-stephen-hawking/episodes/episode-1/

Attached is a photo. I will post lots of technical info, plots, photos and FAQ 
here next week:

http://leapsecond.com/great2016a/

/tvb
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and follow the instructions there.

[time-nuts] GENIUS by Stephen Hawking (PBS TV), with 5071A cesium clocks

[Tom Van Baak]

Fellow time nuts,

Here in the US, a new six-part TV series on National Geographic / PBS starts 
next Wednesday, May 18th, 2016. The title is "Genius by Stephen Hawking" and 
episode 1 is: Can We Time Travel?

Having not seen it yet, I can't make a promise of its "SNR" (Science to 
Nonsense Ratio). It might be quite educational, or at least, very entertaining. 
And I'm definitely going to watch it with my family.

So why do I mention this?

Well, I spent most of December 2015 and January 2016 working with the UK-based 
producers of the show -- in order to pull off another Einstein 100th 
anniversary, general relativity, cesium atomic clock, gravitational time 
dilation experiment. The location chosen was 9000+ foot Mt Lemmon, near Tucson, 
Arizona.

The Hawking series covers a wide variety of topics, and this atomic clock bit 
is just one very small part. They were inspired by the DIY experiment I did ( 
http://leapsecond.com/great2005/tour/ ) and they wanted to create and film 
something similar. So I offered to help. Scenes with (me? and) my 5071A cesium 
clocks and hp 53132A / SR620 time interval counters are in episode 1.

The PR link to the episode is:

http://www.pbs.org/genius-by-stephen-hawking/episodes/episode-1/

Attached is a photo. I will post lots of technical info, plots, photos and FAQ 
here next week:

http://leapsecond.com/great2016a/

/tvb
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