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these sack is a deep space atomic clock

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it's a space atomic clock it uses

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technology to exist on the ground today

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in our ground tracking station those

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atomic clocks are and I'm

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refrigerator-sized which is not suitable

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for Space Flight this clock like smaller

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keeps the same kind of accuracy and

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stability as ground clocks and enable

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enables us to do a space tracking in a

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very different way than we traditionally

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do it essentially it allows us to take

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what is now a two-way exercise where

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signals go up from there

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food spacecraft and come back down

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allows us to either track on board the

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spacecraft or send from the spacecraft

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down at the earth with the one

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wavelength and that enables a lot of

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things for us

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one is that measurement can be much more

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accurate than the two a measurement so

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that improves our net overall navigation

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it also uses uses the tracking networks

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much more efficiently so we can get more

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data there are other applications for it

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it's helps with any endeavor that uses

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radio signals for science like gravity

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science or atmospheric science and

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planets and then here near our Earth's

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space clocks are fundamental to the

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things like the GPS system without them

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we wouldn't have GPS and so our clock

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these sack is about an order of

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magnitude more accurate and stable than

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the existing GPS based clocks

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it's been an exciting year

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we've made a lot of progress with the

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design and detail development of the

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clock we went through some critical

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design reviews and we're icing ahead

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with building what we call a bread board

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that has flight components for the most

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part kind of built in a flat way it's

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not in its flight configuration but that

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allows us to really check out the clock

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and it's in fashion and make sure that

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it works like we expect for and in

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conjunction with that we're designing

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and developing the components of the

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actual demonstration unit that we're

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going to put in space how are we going

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to check out these functions that are

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ultimately usable in deep space whether

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gravity science at a at a satellite like

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your ropa we're not obviously gonna be

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able to do those things but what's

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fundamental to those things is this

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measurement of either range or a range

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right between the spacecraft into the

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tracking source and the clock plays a

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key role and making sure that those

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measurements are precise as they can be

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so in low-earth orbit we can confirm

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that accuracy and we can also do some

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experiments where we do navigation as if

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we were in new space one of the

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characteristics of deep space nav is you

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get tracking for a while and then you

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don't for many hours or maybe a day and

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so what's important for the clock is

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that it doesn't drift away from where it

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needs to be in those tracking gaps and

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we can obviously confirm that and low

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Earth orbit as well and it's still a

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great environment to really check out

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robust space operations you know there

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are there are effects out there

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magnetics and

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temperature effects and radiation

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effects you know this space and it does

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impact the forms clock if we don't model

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the count for three hallmark of D sac is

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that it doesn't weigh for a typical

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10-year deep space mission de sac would

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either would lose or gain only about a