In the mid 70s before GPS was active. I was in the US Coast Guard on an Oceanography ship. We had an old rack mounted Honeywell DDP-516 with ferrite bead memory and paper tape reader and teletype output. It was used for precise navigation with Loran C and doppler satellites. We had a HP Cesium Beam time standard next to the DDP-516. It could replace a Loran station for location triangulation. Not sure exactly how it worked but we were able to return to a position 12 months later in the ocean and trigger a titanium sphere to pop up from the ocean bottom using an ultrasonic signal.

Very informative Gary!. Love to watch your videos from Sri Lanka.

consequences of bad time managements = Blues Brothers car crashes

Used Rubidium time standards are available on eBay from ~$150 up. They are often 'service pulls' from older Cellphone network systems but can work fine for precision time-keeping. I love the idea of an all-in-one 'drop-in' card for a PC but for ham radio and tinkering those used rack-mount jobs are a steal!

Ok cool but what if we wanna put a PC in our atomic clock

Gary just does the coolest tech videos, second to none 👍🏻

Wow Gary. This is interesting stuff, yet again.

the real limitation of time granularity is not so much the time keeping devices like this one - its the synchronization of multiple location-spanning devices due to attempting to cope with communication latencies. "not a consumer item" - well, I've got a desktop PC with some available PCI slots and have been hoping something would come along that would be interesting to put in them; this definitely qualifies, and if could get this for $250 or under would just jump on it. But until reaches that price point will still just keep acquiring FPGA goodies

This is indeed cool! And interesting! Thanks Gary!!!

Gary. Is there a playlist for the Time videos? Sometimes hard to find the right ones, given how prolific you are!

A ptp implementation would be a great topic for another video

Could be used to make reliable end to end encryption apps

hey thanks for the Video! Whatching from Colombia in South America! Could you explain maybe in a future video about leap seconds? And How UTC works ?

Gary please make a video on Xilinx. I heard they are being acquired by AMD.

It seems Gary and Jeff Geerling are in sync 🤣

Did you know anything about the UNISOC processor?? Can you talk about it??

Where did you find the time to explain ? :-)

So, in this case, could we call the PCIe time card for Stratum 0 device, meanwhile the PC that has the device is located in Stratum 1 and further servers that wants to get their NTP synced from this device are in Stratum 2? Thank you!

Excuses Gary now has for being late: 0.000000001

Did you lift it up and then put it down during the installation?

where do we buy this card?

How long before we have one on our wrists?

where to get atomic clock like this? I didn't found it on ebay

Would be cool to have a time card locally.

Pretty much an essential component for a system operating in a radio silent zone which cannot be safely connected to the internet! :)

The Dr Who movie in 1996 Paul McGann he needed an Atomic Clock to stop the Master 😃

LOL @ 11:07 that little chuckle

Could this be the basis of a distributed LORAN clone, where a local alternative to GPS could be provided by enthusiastic techies/radio hams? The $1500 would probably be too high a hurdle to get over, for anything more than a flight of fancy. 🤔

I'm using Arch

Gravity does affect the clock's tick rate.

Maybe @CocorochDB will revisit essential design decisions based on assumption - 'regular enterprise can't afford atomic clock' ;)

when ever I boot to windows after Linux , why time change everytime 🤔

Nevermind should: it's not a consumer thing that you *can* get.

Will this help my ping time in CS:GO?

What about day light saving... ?

cooooooooool

Guess its impossible to OC by changing the clock cicles with this device

True but want ccp accurate time...

Wow, atomic clock is that small?

These geek collectives are making Star Trek ever so closer more then the rich fellas

*TIME LORD CONFIRMED!*

Why? Computer time if hooked to the net is no different

Awesome 👍

Well all right then! 1,5000 bucks! Sure thing... That is so geeky I need one... :-P NOT... Thanks for the Ultimate Geek Clock video! LLAP

what he said...

If it was under 100 USD or 1000 SEK I’d buy and put it in my desktop. UPDATE 2022-07-26: I’ve checked one seller and it’s about 30000 SEK.

Sure that was an accident by the US navy. That was the exact tie I was landing my personal space yacht in San Fransisco to meet with the president #KlattuVeradaNicto

Is this the reason why the minimum ping in PUBGM is 20ms??

I commented without using Mouse

keep it away from helium

Cesium clock? this small? Rubidium, Laser, lol!

hope not radioactive lol

Yeah.. totally predictable (no pun indeed) First on Linus, now here. Come on, we dont need PTP. How about disclosure the real reasons..