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  • I am an astrodynamicist --

  • you know, like that guy Rich Purnell in the movie "The Martian."

  • And it's my job to study and predict motion of objects in space.

  • Currently we track about one percent of hazardous objects on orbit --

  • hazardous to services like location,

  • agriculture, banking,

  • television and communications,

  • and soon -- very soon --

  • even the internet itself.

  • Now these services are not protected from, roughly, half a million objects

  • the size of a speck of paint

  • all the way to a school bus in size.

  • A speck of paint,

  • traveling at the right speed,

  • impacting one of these objects,

  • could render it absolutely useless.

  • But we can't track things as small as a speck of paint.

  • We can only track things as small as say, a smartphone.

  • So of this half million objects that we should be concerned about,

  • we can only track about 26,000 of these objects.

  • And of these 26,000, only 2,000 actually work.

  • Everything else

  • is garbage.

  • That's a lot of garbage.

  • To make things a little bit worse,

  • most of what we launch into orbit never comes back.

  • We send the satellite in orbit,

  • it stops working, it runs out of fuel,

  • and we send something else up ...

  • and then we send up something else ...

  • and then something else.

  • And every once in a while,

  • two of these things will collide with each other

  • or one of these things will explode,

  • or even worse,

  • somebody might just happen to destroy one of their satellites on orbit,

  • and this generates many, many more pieces,

  • most of which also never come back.

  • Now these things are not just randomly scattered in orbit.

  • It turns out that given the curvature of space-time,

  • there are ideal locations

  • where we put some of these satellites --

  • think of these as space highways.

  • Very much like highways on earth,

  • these space highways can only take up a maximum capacity of traffic

  • to sustain space-safe operations.

  • Unlike highways on earth,

  • there are actually no space traffic rules.

  • None whatsoever, OK?

  • Wow.

  • What could possibly go wrong with that?

  • (Laughter)

  • Now, what would be really nice

  • is if we had something like a space traffic map,

  • like a Waze for space that I could look up

  • and see what the current traffic conditions are in space,

  • maybe even predict these.

  • The problem with that, however,

  • is that ask five different people,

  • "What's going on in orbit?

  • Where are things going?"

  • and you're probably going to get 10 different answers.

  • Why is that?

  • It's because information about things on orbit is not commonly shared either.

  • So what if we had a globally accessible,

  • open and transparent space traffic information system

  • that can inform the public of where everything is located

  • to try to keep space safe and sustainable?

  • And what if the system could be used

  • to form evidence-based norms of behavior --

  • these space traffic rules?

  • So I developed ASTRIAGraph,

  • the world's first crowdsourced, space traffic monitoring system

  • at the University of Texas at Austin.

  • ASTRIAGraph combines multiple sources of information from around the globe --

  • government, industry and academia --

  • and represents this in a common framework that anybody can access today.

  • Here, you can see 26,000 objects orbiting the earth,

  • multiple opinions,

  • and it gets updated in near real time.

  • But back to my problem of space traffic map:

  • What if you only had information from the US government?

  • Well, in that case, that's what your space traffic map would look like.

  • But what do the Russians think?

  • That looks significantly different.

  • Who's right? Who's wrong?

  • What should I believe?

  • What could I trust?

  • This is part of the issue.

  • In the absence of this framework to monitor space-actor behavior,

  • to monitor activity in space --

  • where these objects are located --

  • to reconcile these inconsistencies

  • and make this knowledge commonplace,

  • we actually risk losing the ability

  • to use space for humanity's benefit.

  • Thank you very much.

  • (Applause and cheers)

I am an astrodynamicist --

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B1 中級

TED】モリバ・ジャー。世界初のクラウドソーシング型宇宙交通監視システム (世界初のクラウドソーシング型宇宙交通監視システム|モリバ・ジャー) (【TED】Moriba Jah: The world's first crowdsourced space traffic monitoring system (The world's first crowdsourced space traffic monitoring system | Moriba Jah))

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    林宜悉 に公開 2021 年 01 月 14 日
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