[time-nuts] GPS on Science Friday, Marconi Prize

How GPS Found Its Way 08:36 minutes, Brad Parkinson http://www.sciencefriday.com/segments/how-gps-found-its-way/ Marconi prize Stanford Professor Bradford Parkinson, Father of GPS, to Receive the 2016 Marconi Prize

[time-nuts] Maser 0.7 nsec jumps solved

Hi all, Awhile back I posted about some mysterious 0.7 ns jumps in three different masers (of the same brand) at three different locations around Australia. Well we think we've found the problem. All three locations also have in-room air conditioners of the same brand. These are used for cooling

Re: [time-nuts] HP5065A environmental sensitivities

Hej Poul-Henning, On 05/20/2016 04:27 PM, Poul-Henning Kamp wrote: In message <573edc73.9040...@rubidium.dyndns.org>, Magnus Danielson writes: Humidity and pressure play a role with surrounding temperature in cooling in that it they will shift the thermal resistance through which the

Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV),

Hi Tom, Nice photos. Looks like you guys had a great time. Cheers, Magnus On 05/21/2016 09:09 PM, Tom Van Baak wrote: Mike, For the episode itself it was probably unnecessary to show that zeroing or syncing step. But of course it's important to me, the original doubting Thomas, and is

Re: [time-nuts] FE-5680A GPS discipline board on sale now

You SHOULD never have to write very frequently to the EEPROM. As long at the 5680 is connected to the GPS you don't have to write to the EEPROM at all. Only time you'd need to write is just before it is disconnected. Will you do that even three times a week. The unit that discipline the 5680

[time-nuts] US PNT Advisory Board

Fellow time-nuts, Earlier this week was the US PNT Advisory Board meeting in National Harbor, MD. The Advisory Board is part of the GPS governance. I see that the slide material is now up there: http://www.gps.gov/governance/advisory/meetings/2016-05/ It was an interesting exercise and the

Re: [time-nuts] HP5071

Hi, On 05/22/2016 02:13 AM, Bob Camp wrote: Hi On May 21, 2016, at 7:18 PM, Magnus Danielson wrote: Never the less NIST and USNO keeps them in temperature and humidity stabilized environment with well stabilized power. Just to keep such systematics out of major

Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV),

Hi The real answer to the question lies in the scientific method its self. You never ever rely on any single experiment, no matter how well done. There is no single experiment that can ever prove a point “beyond any doubt” (yes that is deliberate). Instead the answer is to look at *all* of

Re: [time-nuts] HP5071

Hi > On May 21, 2016, at 7:18 PM, Magnus Danielson > wrote: > > Hi, > > On 05/22/2016 12:11 AM, Richard (Rick) Karlquist wrote: >> >> >> On 5/21/2016 11:25 AM, Attila Kinali wrote: >> >>> I'd give a lot to read the design documents of the 5071. >>> There must be

Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV),

> Tom > Impressive. Nice job. > > How would one go about to prove beyond a doubt in that experiment that 18ns > of phase shift in 24 hrs was truly caused by freq offset due to Relativity > and not by some other combination of environment and handling issues Hi Warren, I've given a lot thought

Re: [time-nuts] HP5071

Hi, On 05/22/2016 12:11 AM, Richard (Rick) Karlquist wrote: On 5/21/2016 11:25 AM, Attila Kinali wrote: I'd give a lot to read the design documents of the 5071. There must be a lot of knowhow and techniques in them. Read papers by me and my colleagues at the 1992 Frequency Control

Re: [time-nuts] HP5071

On 5/21/2016 11:25 AM, Attila Kinali wrote: I'd give a lot to read the design documents of the 5071. There must be a lot of knowhow and techniques in them. Read papers by me and my colleagues at the 1992 Frequency Control Symposium. There is nothing else in the public domain. What

Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV),

On Sat, 21 May 2016 20:30:16 +0200 Attila Kinali wrote: > The only two things that have this effect are (true) gravity and speed. TvB and ws both pointed out that I am wrong here. A homogenous gravity field and linear acceleration are indisdinguishable. The rest of the mail

Re: [time-nuts] 1937 Time Standard

Hi Thomas, > I was wondering if anyone knew what the "state of the art" time standard was > in the 1937 ? The 1930's were an exciting time in this regard. The best time standards (in vacuum pendulum clocks) were those used by astronomers. Google: Shortt-Synchronome. Laboratory quartz clocks

Re: [time-nuts] 1937 Time Standard

Hi Roughly in that era, low frequency quartz standards were showing up. By today’s measures things were pretty rough. A rack full of gear from GR organized around a 100 KHz bar quite literally housed in a heated wooden box was one of the contenders. The UK and Germany also had horses in that

[time-nuts] 1937 Time Standard

I was wondering if anyone knew what the "state of the art" time standard was in the 1937 ? ___ 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

Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV),

Mike, For the episode itself it was probably unnecessary to show that zeroing or syncing step. But of course it's important to me, the original doubting Thomas, and is covered in all the data analysis. For you, or others who want to read more about the experiment, scroll down to the time

Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV),

Hi Bob, That's right. The Hawking/PBS show wanted to show time dilation. My goal was to make absolutely sure that the experiment worked. Given that the UK producers flew a group of ten to Tucson for the filming I did not want to be the one to screw up. So that's one reason my car had so much

Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV),

I too enjoyed the show as well as Tom's part in it. However call me "doubting Thomas" or in this case Mike, I have the same concerns as expressed by "ws". Also, an initial comparison of the two used, at low altitude, to show an unmeasurable difference would have been helpful. All that aside it

[time-nuts] HP5071 (was: GENIUS by Stephen Hawking (PBS TV))

Hoi Rick On Sat, 21 May 2016 10:02:50 -0700 "Richard (Rick) Karlquist" wrote: > I was on the 5071A design team 25 years ago. I designed most of the RF > sections. We analyzed all known environmental effects (they were > known from experience with the 5061) and, using

Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV),

On Sat, 21 May 2016 08:37:25 -0700 ws at Yahoo via time-nuts wrote: > To increase *gravity* a lot more than a 7,000 ft altitude change, and > without changing the environment variables, could one set of the CS clocks > be put on a centrifuge, such as a fast spinning

Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV),

On 5/21/2016 8:37 AM, ws at Yahoo via time-nuts wrote: How would one go about to prove beyond a doubt in that experiment that 18ns of phase shift in 24 hrs was truly caused by freq offset due to Relativity and not by some other combination of environment and handling issues that effected phase

Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV),

Hi If you noticed, when they played at the back of the car, Tom seemed to have a few “spare” 5071’s along….. Just out driving around with a half dozen 5071’s in the middle of Arizona …. nothing at all odd about that …. Any time you see a TV show that does something like this, you can be pretty

Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV),

Tom Impressive. Nice job. How would one go about to prove beyond a doubt in that experiment that 18ns of phase shift in 24 hrs was truly caused by freq offset due to Relativity and not by some other combination of environment and handling issues that effected phase &/or freq once the identical

Re: [time-nuts] FE-5680A GPS discipline board on sale now

You're right. The EEPROM of concern is the one in the 5680. Since they're used, you have no idea how many writes they've already endured (likely a low number), and they're quite old. Sent from my iPhone > On May 20, 2016, at 3:20 PM, paul swed wrote: > > Mark > By

Re: [time-nuts] Get together at IMS?

I will attend the IMS from Tuesday through Thursday noon time. Most time I will be at booth 714 (Dynamic Engineers). Good proposal to meet at the Industry reception on Wednesday. Please come up with a proposal for the meeting point, as the hall is big. Best regards Bernd DK1AG