Tiny satellites that photograph the entire planet, every day | Will Marshall

232,398 views

2014-11-18 ・ TED


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Tiny satellites that photograph the entire planet, every day | Will Marshall

232,398 views ・ 2014-11-18

TED


Please double-click on the English subtitles below to play the video.

00:12
The Earth needs no introduction.
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It needs no introduction in part because the Apollo 17 astronauts,
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when they were hurtling around the moon in 1972,
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took this iconic image.
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It galvanized a whole generation of human beings
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to realize that we're on Spaceship Earth,
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fragile and finite as it is,
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and that we need to take care of it.
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But while this picture is beautiful, it's static,
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and the Earth is constantly changing.
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It's changing on days' time scales with human activity.
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And the satellite imagery we have of it today is old.
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Typically, years old.
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And that's important because you can't fix what you can't see.
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What we'd ideally want is images of the whole planet every day.
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So, what's standing in our way?
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What's the problem?
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This is the problem:
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Satellites are big, expensive and they're slow.
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This one weighs three tons.
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It's six meters tall, four meters wide.
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It took up the entire fairing of a rocket just to launch it.
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One satellite, one rocket.
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It cost 855 million dollars.
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Satellites like these have done an amazing job
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at helping us to understand our planet.
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But if we want to understand it much more regularly,
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we need lots of satellites,
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and this model isn't scalable.
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So me and my friends, we started Planet Labs
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to make satellites ultra-compact
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and small and highly capable.
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I'm going to show you what our satellite looks like:
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This is our satellite.
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This is not a scale model,
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this is the real size.
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It's 10 by 10 by 30 centimeters,
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it weighs four kilograms,
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and we've stuffed the latest and greatest electronics
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and sensor systems into this little package
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so that even though this is really small,
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this can take pictures 10 times the resolution of the big satellite here,
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even though it weighs one thousandth of the mass.
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And we call this satellite "Dove" — Thank you.
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(Applause)
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We call this satellite "Dove,"
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and we call it "Dove" because satellites are typically named
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after birds, but normally birds of prey:
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like Eagle, Hawk, Swoop, Kill, I don't know,
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Kestrel, these sort of things.
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But ours have a humanitarian mission,
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so we wanted to call them Doves.
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And we haven't just built them, though.
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We've launched them.
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And not just one, but many.
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It all started in our garage.
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Yes, we built our first satellite prototype in our garage.
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Now, this is pretty normal for a Silicon Valley company that we are,
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but we believe it's the first time for a space company.
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And that's not the only trick we learned from Silicon Valley.
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We rapidly prototype our satellites.
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We use "release early, release often" on our software.
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And we take a different risk approach.
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We take them outside and test them.
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We even put satellites in space just to test the satellites,
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and we've learned to manufacture our satellites at scale.
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We've used modern production techniques
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so we can build large numbers of them,
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I think for the first time.
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We call it agile aerospace,
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and that's what's enabled us to put so much capability into this little box.
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Now, what has bonded our team over the years
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is the idea of democratizing access to satellite information.
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In fact, the founders of our company, Chris, Robbie and I,
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we met over 15 years ago at the United Nations
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when they were hosting a conference about exactly that question:
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How do you use satellites to help humanity?
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How do you use satellites to help people in developing countries
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or with climate change?
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And this is what has bonded us.
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Our entire team is passionate about using satellites to help humanity.
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You could say we're space geeks,
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but not only do we care about what's up there,
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we care about what's down here, too.
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I'm going to show you a video
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from just four weeks ago of two of our satellites
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being launched from the International Space Station.
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This is not an animation,
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this is a video taken by the astronaut looking out of the window.
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It gives you a bit of a sense of scale of our two satellites.
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It's like some of the smallest satellites ever
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are being launched from the biggest satellite ever.
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And right at the end, the solar array glints in the sun.
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It's really cool. Wait for it.
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Boom! Yeah. It's the money shot.
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(Laughter)
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So we didn't just launch two of them like this,
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we launched 28 of them.
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It's the largest constellation of Earth-imaging satellites in human history,
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and it's going to provide a completely radical new data set
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about our changing planet.
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But that's just the beginning.
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You see, we're going to launch more than 100 of these satellites
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like these over the course of the next year.
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It's going to be the largest constellation of satellites in human history.
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And this is what it's going to do:
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Acting in a single-orbit plane that stays fixed with respect to the sun,
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the Earth rotates underneath.
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They're all cameras pointed down,
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and they slowly scan across as the Earth rotates underneath.
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The Earth rotates every 24 hours,
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so we scan every point on the planet every 24 hours.
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It's a line scanner for the planet.
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We don't take a picture of anywhere on the planet every day,
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we take a picture of every single place on the planet every day.
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Even though we launched these just a couple of weeks ago,
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we've already got some initial imagery from the satellites
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and I'm going to show it publicly for the first time right now.
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This is the very first picture taken by our satellite.
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It happened to be over UC-Davis' campus
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in California when we turned the camera on.
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But what's even cooler is when
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we compare it to the previous latest image of that area,
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which was taken many months ago.
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And the image on the left is from our satellite,
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and we see buildings are being built.
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The general point is that we will be able to track urban growth as it happens
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around the whole world in all cities, every day.
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Water as well.
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Thank you.
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(Applause)
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We'll be able to see the extent of all water bodies
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around the whole world every day and help water security.
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From water security to food security.
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We'll see crops as they grow in all the fields
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in every farmer's field around the planet every day.
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and help them to improve crop yield.
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This is a beautiful image that was taken
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just a few hours ago when the satellite was flying over Argentina.
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The general point is
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there are probably hundreds and thousands of applications of this data,
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I've mentioned a few, but there's others:
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deforestation, the ice caps melting.
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We can track all of these things, every tree on the planet every day.
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If you took the difference between today's image and yesterday's image,
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you'd see much of the world news — you'd see floods and fires and earthquakes.
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And we have decided, therefore, that the best thing that we could do with our data
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is to ensure universal access to it.
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We want to ensure everyone can see it.
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Thank you. (Applause)
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We want to empower NGOs and companies and scientists and journalists
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to be able to answer the questions that they have about the planet.
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We want to enable the developer community to run their apps on our data.
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In short, we want to democratize access to information about our planet.
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Which brings me back to this.
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You see, this will be an entirely new global data set.
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And we believe that together,
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we can help to take care of our Spaceship Earth.
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And what I would like to leave you with is the following question:
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If you had access to imagery of the whole planet every single day,
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what would you do with that data?
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What problems would you solve?
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What exploration would you do?
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Well, I invite you to come and explore with us.
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Thank you very much.
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(Applause)
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