Re: [time-nuts] History Channel "In Search of" Time Travel

[David Smith]

You're a movee star!

-Original Message-
From: time-nuts  On Behalf Of Tom Van Baak
Sent: Friday, August 17, 2018 2:08 PM
To: Discussion of precise time and frequency measurement 

Subject: [time-nuts] History Channel "In Search of" Time Travel

Check out History Channel tonight (Friday, August 17) for a new series called 
"In Search Of" hosted by Zachary Quinto. Episode 5 is titled "Time Travel".

There's a chance this episode will include some bits with my car & cesium 
clocks. Earlier this year I was invited by the producers to perform a 
gravitational time dilation experiment like the ones I did in 2016 for a 
Stephen Hawking TV show and the family clock trip up Mt Rainier in 2005.

This time I selected Mt Palomar, CA which is conveniently located in the 
greater LA area. You likely know of Palomar because of the famous 200 inch Hale 
telescope up at the ~5500 foot summit. Our base was a beachfront hotel in 
Seaside, CA. The elevation difference was about 1.6 km and the clocks were 
separated for about 24 hr so 15 ns of time dilation is expected.

Over two days they certainly took lots of footage of the clocks, the car, and 
some conversations with me. I have no idea how many seconds of actual screen 
time that might result in. None of it was scripted or rehearsed so I hope I 
didn't do or say anything too stupid on camera. I'll have more info by tomorrow 
and update the web page:

https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fleapsecond.com%2Fgreat2018a%2Fdata=02%7C01%7C%7Cfaec212930eb447b837c08d60485abd9%7C84df9e7fe9f640afb435%7C1%7C0%7C636701369486005780sdata=txsMDLuqT6Lu32dth8ArZZRuskRvA98VNmmK3TB42Jk%3Dreserved=0

/tvb


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Re: [time-nuts] History Channel "In Search of" Time Travel

[Steve Allen]

On Fri 2018-08-17T14:07:49-0700 Tom Van Baak hath writ:
> This time I selected Mt Palomar, CA which is

[adding to the typo objections]
known to all astronomers by its proper name "Palomar Mountain"

--
Steve Allen  WGS-84 (GPS)
UCO/Lick Observatory--ISB 260  Natural Sciences II, Room 165  Lat  +36.99855
1156 High Street   Voice: +1 831 459 3046 Lng -122.06015
Santa Cruz, CA 95064   http://www.ucolick.org/~sla/   Hgt +250 m

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Re: [time-nuts] History Channel "In Search of" Time Travel

[Tom Van Baak]

> Seaside as in near Sand City, Monterey & Fort Ord?  That's quite a drive 
> down to Palomar, no matter which route you take.

Hi Jim,

Sorry, s/Sea/Ocean/

Oceanside, CA; between Los Angeles and San Diego. Driving from the beach to the 
summit of Mt Palomar was just over an hour. A gorgeous road.

Updated with iPhone screen shots: http://leapsecond.com/great2018a/

/tvb


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Re: [time-nuts] History Channel "In Search of" Time Travel

[wb6bnq]

Hi Tom,

I think you need to improve your map reading skills.  I do believe you 
meant Oceanside, Ca.  Also, both Oceanside and Mt. Polomar are in San 
Diego County, the furthest county south along the California coast.


Looking for more pictures and a longer story.  Keep up the good work.

If knew you were going to be in my area I would have like to have had a 
lunch meeting.  Well next time possibly.


Good luck,

BillWB6BNQ


Tom Van Baak wrote:


Check out History Channel tonight (Friday, August 17) for a new series called "In Search 
Of" hosted by Zachary Quinto. Episode 5 is titled "Time Travel".

There's a chance this episode will include some bits with my car & cesium 
clocks. Earlier this year I was invited by the producers to perform a gravitational 
time dilation experiment like the ones I did in 2016 for a Stephen Hawking TV show 
and the family clock trip up Mt Rainier in 2005.

This time I selected Mt Palomar, CA which is conveniently located in the 
greater LA area. You likely know of Palomar because of the famous 200 inch Hale 
telescope up at the ~5500 foot summit. Our base was a beachfront hotel in 
Seaside, CA. The elevation difference was about 1.6 km and the clocks were 
separated for about 24 hr so 15 ns of time dilation is expected.

Over two days they certainly took lots of footage of the clocks, the car, and 
some conversations with me. I have no idea how many seconds of actual screen 
time that might result in. None of it was scripted or rehearsed so I hope I 
didn't do or say anything too stupid on camera. I'll have more info by tomorrow 
and update the web page:

http://leapsecond.com/great2018a/

/tvb


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Re: [time-nuts] History Channel "In Search of" Time Travel

[jimlux]

On 8/17/18 2:07 PM, Tom Van Baak wrote:

Check out History Channel tonight (Friday, August 17) for a new series called "In Search 
Of" hosted by Zachary Quinto. Episode 5 is titled "Time Travel".

There's a chance this episode will include some bits with my car & cesium 
clocks. Earlier this year I was invited by the producers to perform a gravitational 
time dilation experiment like the ones I did in 2016 for a Stephen Hawking TV show 
and the family clock trip up Mt Rainier in 2005.

This time I selected Mt Palomar, CA which is conveniently located in the greater LA area. You likely know of Palomar because of the famous 200 inch Hale telescope up at the ~5500 foot summit. Our base was a beachfront hotel in Seaside, CA. 


Seaside as in near Sand City, Monterey & Fort Ord?  That's quite a drive 
down to Palomar, no matter which route you take.



The elevation difference was about 1.6 km and the clocks were separated 
for about 24 hr so 15 ns of time dilation is expected.


Over two days they certainly took lots of footage of the clocks, the car, and 
some conversations with me. I have no idea how many seconds of actual screen 
time that might result in. None of it was scripted or rehearsed so I hope I 
didn't do or say anything too stupid on camera. I'll have more info by tomorrow 
and update the web page:

http://leapsecond.com/great2018a/

/tvb


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Re: [time-nuts] 1PPS for the beginner

[ew via time-nuts]

Thank you
Bert
 
In a message dated 8/17/2018 7:20:40 AM Eastern Standard Time, 
azelio.bori...@gmail.com writes:

 
 Direct link to the TOW time 2017:

On Fri, Aug 17, 2018 at 12:41 PM ew via time-nuts
 wrote:
>
> Tom
> go back many times to the two editions I have. Very informative. Tried the 
> link no luck. Are there updated editions?
> Thanks again
> Bert Kehren
>
> In a message dated 8/17/2018 5:29:40 AM Eastern Standard Time, 
> tom.k...@gmail.com writes:
>
>
> Dana (and others) --
>
> Concerning 1PPS, hanging bridges & such items, you might want to look at
> the Timing/VLBI papers that Rick Hambly & I have produced over the years
> and which we have archived on https://GPSTime.com . The Sawtooth &
> Hanging Bridges effects are described in excruciating detail in the "Low
> Cost, High Accuracy" paper from the 2000 ION meeting. And the software
> and hardware fixes are described in the later VLBI TOW (every 2 years)
> presentations.
>
> Hope this helped to answer the questions -- 73, Tom K3IO
>
>
> ---
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
>
>
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Re: [time-nuts] 1PPS for the beginner

[Azelio Boriani]

Direct link to the TOW time 2017:

On Fri, Aug 17, 2018 at 12:41 PM ew via time-nuts
 wrote:
>
> Tom
> go back many times to the two editions I have. Very informative. Tried the 
> link no luck. Are there updated editions?
> Thanks again
> Bert Kehren
>
> In a message dated 8/17/2018 5:29:40 AM Eastern Standard Time, 
> tom.k...@gmail.com writes:
>
>
>  Dana (and others) --
>
> Concerning 1PPS, hanging bridges & such items, you might want to look at
> the Timing/VLBI papers that Rick Hambly & I have produced over the years
> and which we have archived on https://GPSTime.com . The Sawtooth &
> Hanging Bridges effects are described in excruciating detail in the "Low
> Cost, High Accuracy" paper from the 2000 ION meeting. And the software
> and hardware fixes are described in the later VLBI TOW (every 2 years)
> presentations.
>
> Hope this helped to answer the questions -- 73, Tom K3IO
>
>
> ---
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
>
>
> ___
> time-nuts mailing list -- time-nuts@lists.febo.com
> To unsubscribe, go to 
> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
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Re: [time-nuts] 1PPS for the beginner

[ew via time-nuts]

Tom
go back many times to the two editions I have. Very informative. Tried the link 
no luck. Are there updated editions?
Thanks again
Bert Kehren
 
In a message dated 8/17/2018 5:29:40 AM Eastern Standard Time, 
tom.k...@gmail.com writes:

 
 Dana (and others) --

Concerning 1PPS, hanging bridges & such items, you might want to look at 
the Timing/VLBI papers that Rick Hambly & I have produced over the years 
and which we have archived on https://GPSTime.com . The Sawtooth & 
Hanging Bridges effects are described in excruciating detail in the "Low 
Cost, High Accuracy" paper from the 2000 ION meeting. And the software 
and hardware fixes are described in the later VLBI TOW (every 2 years) 
presentations.

Hope this helped to answer the questions -- 73, Tom K3IO


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Re: [time-nuts] 1PPS for the beginner

[Tom Clark]

Dana (and others) --

Concerning 1PPS, hanging bridges & such items, you might want to look at 
the Timing/VLBI papers that Rick Hambly & I have produced over the years 
and which we have archived on https://GPSTime.com . The Sawtooth & 
Hanging Bridges effects are described in excruciating detail in the "Low 
Cost, High Accuracy" paper from the 2000 ION meeting. And the software 
and hardware fixes are described in the later VLBI TOW (every 2 years) 
presentations.


Hope this helped to answer the questions -- 73, Tom K3IO


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