Original subtitles

(upbeat music)

- [Cray] Humans have always had the impulse

to explore towards the night sky,

towards the cosmos,

towards the unknown.

(boinging noise)

- [Announcer] Thrusting outward into space,

we gain new perspective on ourselves.

- But it's not just about going as far as we can.

Space exploration also provides a unique vantage

to look back at Earth, all of Earth,

in near real time.

- Exploring space, we learn quite a bit.

We learn about our home planet.

We learn about our solar system.

We learn about our universe.

- Sensors on satellites have revolutionized the way

that we understand the Earth.

The data is used for measuring snow cover,

infrastructure in cities, mapping.

There's a lot to explore.

- The technology has increased in capability,

has decreased in size and cost,

and that enables a lot of things to happen.

- I'm Cray Novick.

- And I'm Myrna James.

It's time to go "Behind the Wings."

A big focus for NASA and players throughout the industry

has become our own planet Earth.

So today, we're gonna focus on the question,

what can we learn about Earth from data from space?

To start, we'll talk with Dr. Kate Calvin

to learn what NASA Earth is all about.

- One of NASA's most important missions

is our home planet, Earth.

And we have a lot of research going on about Earth

from observations to models to technology.

We measure the Earth on and above the Earth's surface,

we can see the state of the Earth and how it's changing.

We build computer models that help us understand Earth

that can both help us understand the processes

that are impacting Earth.

They also give us a window into the future

so we can see how Earth might change going forward.

So you think about some of the pictures

that astronauts have taken from the Apollo missions

or from the International Space Station,

and you see Earth,

you see this beautiful blue ball

with clouds swirling around.

And our satellites help us take those sorts of images

nearly continuously, and looking at all of the Earth.

Each satellite is designed to measure something different.

So some are looking at visible light,

some measure changes in gravity,

and we have more than two dozen of these satellites

and instruments in orbit,

and together, they let us see things like vegetation,

carbon dioxide, clouds and precipitation,

changes in the mass of ice sheets, and much more.

- The satellite era in the grand scheme

of earth sciences is relatively recent,

started just after the launch of the Sputnik satellite

in the late '50s.

Into the early '60s, it was very experimental.

There was a lot of funding for developing rockets

and thinking about how to put people up there.

In terms of the instruments that could view our Earth,

that was a little bit secondary.

Well, the first cameras that went up were analog.

Film canisters were dropped from space,

down and being collected by people.

Into the '70s, then,

digital technology started to come online.

And that was really exciting because it allowed us

to start to do some really fancy things,

like send out microwave signals with timestamps on them,

which we use to power our global positioning system

or GPS network.

Right. So we've come a long ways, as earth scientists,

in the use of satellite data.

Right now, it's indispensable.

It's difficult to imagine how science would be undertaken

without satellite instrument measurements.

- We've been collecting observations about the Earth

from satellites for decades.

So we can see, not just the state of the Earth today,

but how it's changed over time.

One of the satellite programs

that we have in partnership with USGS is called Landsat,

and Landsat lets us see land use and land covers.

We can see where there are forests,

where there are urban areas, where there are crops or snow,

and we're coming up on our 50th anniversary of Landsat.

So we have nearly 50 years of observations

of land use and land cover.

So we can see how that has changed over time.

And when you look at Landsat records,

what you'll see is expansions of urban area.

You'll see declines in forest in parts of the world.

And we have other satellite missions like that,

that give us different information.

And we work with a lot of the commercial partners.

So we actually have a commercial small sat

data acquisition program,

where we buy data from some of the commercial small sats

and make it available to NASA researchers

so that we can do more climate research,

more earth science research,

using other satellites,

not just our own missions.

- Satellites are constantly orbiting earth.

And you probably use them every day,

whether you realize it or not.

We're about to use GPS, or the global positioning system,

to head to Maxar's headquarters.

We're gonna meet with Dan Nord

to learn more about satellites and their sensors.

What can we learn about the Earth

by looking back at it from space?

- We think about that every day,

and the answer is a lot.

And so, we have an ability to look at a holistic scale

at the world and monitor change.

And since we've been doing it for 25 years,

we actually have change over time.

And with that, you can model a lot of behavior.

And then if you look globally,

it's where's the next big city growing up.

We can answer that.

The life cycle of a satellite is fascinating.

At first, you need to figure out

what you want to do with your satellite.

And so, we make high resolution Earth-imaging satellites.

We also make satellites that help with communication,

whether it's Wi-Fi or other, and then, multi-spectrals.

And then, you have to build a satellite,

and this is the hardest thing.

This is more like building a Ferrari.

This is custom-built, hand-built large scale technology

that cannot fail.

You can't go fix a satellite once it's up.

There's some companies starting to think about how to do it.

But the things moving thousands of miles an hour,

far away,

so everything has to be checked,

double checked and quadruple checked.

- So yeah. Let's take a look at the satellite.

It's got a couple different parts here.

I mean the, on the sides,

I know you said satellites don't have wings,

but what's happening on the sides?

- Those are solar panels that brings in the sun's energy

to power the vehicle.

But this doesn't have wind resistance or anything, yeah.

Solar panels can't fly.

- They're not gonna provide the lift.

- And then, if you look up here, this is the camera.

So this is actually inverted, aiming down at Earth.

- So we have our power source. This would be our sensor.

And then, I imagine somewhere on here

is a communication device to actually transmit

that back to Earth.

- There you go.

Yeah. And so, it's flying, taking pictures,

and in real time,

sending the data down to our ground stations,

and you've seen what a generic ground station looks like.

It's a dish looking straight back up.

Space is hard.

And what it's reflecting is just how complex

building machinery that needs to withstand

extreme temperatures on the hot side,

extreme temperatures on the cold side, radiation,

there's so much you have to protect against,

and it has to work every time.

You then pick who's gonna launch.

- [Woman] There we heard the final call.

LD is go for launch.

(rocket engine rumbling)

- [Woman 2] And we have lift off.

- [Dan] The last one we did for Sirius XM

was on a SpaceX rocket.

And then once it's up,

they put it in the orbit that we ask for,

either low or mid or high.

And then, we take about a month

to get it into place and test every single element.

And once that's done,

we start pulling imagery down.

These are big imaging satellites that can capture

all of Denver in one pass,

but then can zoom in and look at an individual vehicle

with enough resolution to know what's the make and model,

which is incredible.

And then, when it's time to decommission a satellite,

you put it in a drag orbit

and it burns up in the atmosphere.

- Over 4 billion people

are using Maxar technology every month.

People are probably interacting with satellites,

whether they know it-

- That's right. - Or not on a daily basis.

- The way mapping works, in the old days,

was you had to physically go to a place,

and even Google, when they did their first mapping,

they drove cars all around the world.

Whereas a satellite can do it relatively quickly.

- I do wanna focus in a bit because

there are so many examples.

Tell me about the work you do

with the Jane Goodall Institute,

with chimpanzees and mapping and conservation.

- From space, we can count animals.

It's absolutely fascinating.

We've done it with narwhals in Canada.

With the amount of imagery we have over time,

we can monitor their habitats.

You always hear the stories,

"Oh, this population is dying."

We can count that and check it,

and turn it into real ground truth. Real fact.

So we're looking for these use cases,

because this is new technology at a global scale.

What can we use it for?

We're getting really close, up close imagery,

where each pixel's about 30 centimeters.

We understand what's happening on our planet.

The observation and the crunching

of these massive chunks of data,

so we have 125 petabytes of imagery

that we store and process and we add to every day.

I think it's three and a half million square kilometers

of imagery every day of the Earth.

And we pull it in and we process it.

We can run algorithms that say,

"Hey, actually, this corner of this place,

it's going to be a drought in the next five years."

That's information that's invaluable for

either these companies or these nonprofits

that want to help.

- Here we have a map that shows SAIL,

the Surface Atmosphere Integrated Field Lab,

focused really in the Colorado Rocky Mountains.

And it's a big watershed. It's got the Continental Divide.

And that means a lot of people depend on it for water.

It's a big area.

They're using these satellites,

but the satellites alone aren't enough to get verified data.

And to really see the big picture,

that's something called ground truth.

- Yeah, we definitely need ground control points

so that you can verify on the ground,

as you said, ground truthing the data from space,

to show that they're in the right place on the ground.

That's really essential

for any kind of scientific data like this.

- We've made it to sunny Crested Butte, Colorado.

We're about to head to the top of the mountain

and check out one of SAIL's observation towers.

They're using more than 50 sensors,

taking measurements from bedrock to satellites in space.

Let's go see how it works.

- Water is life.

And it's something that we rely on,

and a lot of our ecosystems rely on as well.

We're here in the headwaters of the Colorado River,

the major river system of the Western United States.

It serves about 40 million people,

and the water for that river comes from snow

that we're seeing here in the mountains.

We're getting a lot less of it.

We're here to make some very detailed measurements

of how that change is occurring.

So we are midway up the mountain

on Crested Butte Mountain Resort.

We are at the mountain site

of the Surface Atmosphere Integrated Field Laboratory,

or SAIL campaign.

Which we can learn a whole lot about the Earth from space.

I have had the privilege of working

with a lot of satellite instrument data sets,

and it's really remarkable because they're so powerful.

One instrument smaller than this trailer

is able to measure the entire planet.

At the same time,

the ways that we measure snow is from satellite.

That's actually a real cutting edge problem,

something that NASA is definitely still working on.

We're providing a great set of observations

to help inform a number of the researchers on SAIL,

who are thinking about how to design

what that satellite looks like.

And the reason it's so hard is because,

just looking at where snow is

doesn't tell you the whole story.

- It's such a complex problem.

And it's really about seeing the big picture

from every different angle,

from space to underground, to 50 different sensors.

And we're at one of the study sites.

We've got a couple of them right here.

Let's go take a closer look at the precipitation radar.

- Inside that radome, that ping pong ball,

is an antenna that spins around

and sends out microwave energy

at wavelengths about three centimeters.

It's very sensitive to how much rain is falling

or how much snow is falling.

This instrument measures the input of water

into watersheds that serve the Colorado River.

My colleague, Ken Williams, will talk a lot more

about water accounting and why that's such a big deal.

- How are some of these instruments working in conjunction

with satellite imagery or balloons

going to the atmosphere,

and some of the other data points

that you guys are collecting?

- Absolutely.

What we're gonna be taking a look at

is called the Aerosol Observing System,

and what it's really trying to do is

to measure the particulates in the atmosphere.

You can see that deposition or that distribution of dust

from things like balloon-based measurements,

from fixed-wing aircraft, and from satellites as well.

It's what we call variations in albedo.

And so, how white the snowpack is

versus how dark the snowpack is,

is really important in terms of how this melts out

in the spring and how that melt water finds its way

to our local streams and rivers.

- That is so cool. Dust is so small,

but you can still see it from space.

- That's absolutely true. It may be small,

but it can have a really outsized impact

on how snowpack and mountain snowpack behaves.

And so, this is the first place in the United States

that allows us to link atmospheric processes

where, when, and how precipitation is falling and occurring,

and how that precipitation finds its way

into local streams, rivers,

and into deep groundwater as well.

The Aerosol Observing System.

Let's go take a look at it.

- Thank you. See, that's why you're the scientist.

All right. Let's look.

- With the rise of climate change,

increased stress on plants,

we're actually really interested to understand

how atmospheric processes play a role

in delivering a critical element,

like nitrogen in these watersheds.

Well, what that's really allows us to do

is now to link satellite-based imagery

from the Landsat satellite products

to really look at the greenness of our forests, okay.

And greenness is really a proxy for forest health.

So we can go back over a decade of Landsat satellite data,

and look at these forests are either increasing

in their greenness or decreasing.

- I've done field work measuring trees,

and I spent a week measuring trees with a colleague,

and we measured the width of every tree

to give us a sense of how old it was

and how much carbon it was storing.

But we covered a very, very small amount of trees

in our week there,

where a satellite can cover the whole surface.

In that same amount of time, all of the Earth.

And so, they kind of work together though.

We use the ground-based measurements

to calibrate the satellites.

We use the satellites to fill in the spaces and times

that we didn't have ground-based measurements.

- Wow. I can't even count how many sensors

we've looked at already,

but we've got miles to go before we sleep.

And if the weather's good,

we might even be able to launch a balloon this afternoon.

Let's pop the skis back on and do it.

- Let's get 'em on.

- Here we go.

Gothic, Colorado is a former mining town,

outside of Crested Butte,

and is now used for scientific research.

And in the winter,

it's only accessible by cross-country skiing.

A few miles later, we arrived at the Gothic Research Center.

So this is really cool.

We're able to see, from space,

pretty much where we're standing, right?

I mean, you can almost see us right there.

- Yeah. Right.

- Not quite, but-

- Well, if we put our hands out, maybe, you know? (laughs)

- The satellites are giving context to all the sensors

and work being done on the ground.

And just like there's sensors here on Earth,

there's also sensors up on those satellites.

- Absolutely.

So the, what we're seeing here

is we're seeing, in these imagery,

where the extent of where the snow is,

but that doesn't actually tell us

how much water is in there.

And so, a lot of the measurements here are getting

at those details of how much water is in the snow

that we're seeing here in the imagery.

We are looking at the imagery that was collected today

of an instrument called Modis,

which stands for the

Moderate Resolution Imaging Spectroradiometer.

So kind of a mouthful.

This is on the NASA Worldview website

that shows all kinds of imagery. It's super powerful.

We know it's from today because

we can see this black spot here,

is where the satellite data hasn't

actually collected information yet.

- What's at stake with these measurements?

- It's, what's at stake is the development

of predictive capability for how much water

we're going to have in the future.

We would really like to know if there's gonna be enough

water for all of us this year, next year,

five years from now, 10 years from now,

without really going to these places

and seeing what's actually happening on the ground.

We're not able to know if any of our predictions have value.

- We're getting ready to do the balloon launch.

What exactly do you do to get ready and launch the balloon?

- First, we prep a sonde,

and this is one of your sondes here.

We use this computer software here to condition this,

and we basically calibrate it.

So it has a relative humidity.

We compare this sensor in here to a sensor inside here.

Same thing with temperature.

- And you make sure it's accurate.

- Exactly.

- Okay. - Yeah.

- And the balloon is kind-of just the vessel to bring it,

how high, exactly, do these balloons go?

- Oh, say 90,000 feet.

It sends via radio link every second.

- Okay. - So we get a download

of height, temperature,

relative humidity, and location,

and it gives you some wind.

- So we've got our helium balloon and a bunch of sensors.

Going way, way up.

- Yep.

(Cray chuckling)

- All right, here we go!

Launching.

The weather balloon will rise into the mesosphere

about 17 miles high,

whereas the commonly agreed definition of space

is around 62 miles high.

Together, measurements from the weather balloon,

the satellites, and all of the other sensors

will help the SAIL team learn more

about mountain watersheds.

Water is life and snow is life, too,

for the 60 to 90% of people worldwide

that depend on mountain watersheds for their water.

We've made our way down to the Slate River,

one of the tributaries to the Colorado,

and even within the US,

that's 40 million people that rely on this water.

Now it turns out,

it's really hard to predict how much precipitation

there's gonna be in the mountains,

and how much of that's actually gonna make

its way into the river.

And that's why SAIL is collecting an unprecedented amount

of data from satellites orbiting right now,

all the way to underground,

to try to understand and actually predict the future,

how much water will be here in five years.

And that's a really important problem to solve.

(light poignant music)

- This chart shows the increase in the number

of operating satellites that exist right now.

In 2006, there were less than a thousand.

So fast forward to 2020, there were less than 3,500,

and really, this number is going up exponentially

with all the different satellites that are being launched,

tiny little nano satellites and small sats,

especially the ones for global internet services

that are coming up.

- We're continually thinking about

what we're gonna launch next, what we wanna measure next,

which science questions we need to answer.

But we're also working, at the same time,

to design what's called the Earth System Observatory.

And this is a set of satellites that are gonna work together

to provide a 3D holistic picture of the Earth,

from the surface up through the atmosphere.

The first satellite in that

will be a satellite called NISAR.

NISAR's gonna let us measure changes

in the Earth's surface at a fine level,

so that we'll be able to see things

like ice sheet collapse and landslides.

Satellites are really critical 'cause they provide us

continuous observations,

and they provide a large extent.

So many of our satellites are global in scope,

so we see the whole Earth,

not just the area right in front of us.

And that's really important 'cause

climate and earth science,

it's a global research area.

And so, the more know about the entire Earth,

the better we can understand Earth,

and the better we can think about

how it might evolve in the future.

And the satellites that we're designing and planning

to launch in the future

will provide even more information,

and give us a better sense of where we are

and where we might go.

So our data, people use it around the world,

from scientists to decision makers.

And a lot of what we do,

when we're thinking about future missions,

is think about what questions do we have.

What do we wanna know about the Earth?

And work from there to design a mission

that can help answer that.

So we know more than we ever have before,

and every year we learn more.

We keep developing new technologies and sensors

that'll give us the ability to understand

even more about the Earth,

from heights of trees to how much snow,

to sea level rise, changes in ice sheets, carbon dioxide.

So we know so much about the Earth,

and the more we learn about the Earth

and the more we understand the processes that affect it,

the better we can plan for the future.

- Now we're looking at a map of satellites in orbit.

There's over 19,000, and if you scroll around,

you can kind of see,

they kind of look like they're everywhere, right?

And then you zoom in lower Earth orbit,

there's even more,

so they're at different altitudes.

They're at different orbits.

They're all spinning at once.

- This is the live map that shows where they really are,

and you can see the concentration in low Earth orbit.

- And what's interesting is, if you flip the type to junk,

it turns out over 13,000 of those 19,000

are not operational. They're junk.

They're old. They're not being used anymore.

The not junk is only 5,000.

So there's way more junk satellites up there

than operating satellites.

And if you play that out, over time,

there's just gonna be more junk and more junk.

And it raises these questions.

How do you get rid of them safely?

How do you avoid collisions?

You know, when two objects collide in orbit,

it creates thousands of small pieces,

and all of those small pieces can then impact again,

collide again with other objects in space.

So the worst case scenario with space debris is

that you kind-of create a belt

of space debris all around Earth,

and that makes it pretty hard to leave orbit.

So it kind of shows how serious this all can be.

Thankfully, there are some companies, today,

starting to work on that.

- My name is Eric Ingram.

I'm Co-Founder and CEO of SCOUT,

and we are a company developing

space domain awareness

and vision capabilities for satellites

to be able to navigate autonomously.

So essentially, by themselves.

So the way we currently track things in space,

be it satellites or debris,

is primarily with Earth ground-based radars and telescopes

that track the traffic going overhead in space,

to determine which dot is which satellite.

As the number of satellites up there increases,

that becomes more difficult.

So what we want to do is be able to better track all of that

to again, make space a safer place to operate in.

The cost of getting to space

and the cost of all the technology is decreasing.

And the capability of that technology is increasing,

just like your cell phone can do a lot more now today

than it could 10 years ago.

And the same thing is true with satellites.

You see Earth observation, communication satellites,

Internet-providing satellites,

all going up in the near future,

and that's changing the way space is operated in.

And so, there's a lot more satellites up there

that are using space

to get all of these amazing services down to Earth.

And companies like ours are working to make sure

the space traffic is navigating a safe way

in that everybody's able to use space

to provide these services to Earth.

- Not all satellites have fuel on board to move.

And so, who has the right of way?

What happened on the roads,

and then the seas, and then the sky,

we're gonna see replicate in space.

So, as things get crowded,

you have to pay attention to directing traffic.

You need to pay attention to cleaning streets.

So all of these are gonna have analogs in space.

It'll be a smaller scale at first,

but everything is moving really fast.

The commercial and government collaborations

have created these companies like SpaceX,

which are bringing business practices.

I mean, now we can put things in space at volume

to start really exploring the world

and making second and third homes for humans.

It's a really exciting time.

- Space startups are filling in for services

that weren't even possible a few years ago,

and are more necessary today than ever before.

- More satellites and sensors in space

provides us with more data

than we've ever had before,

and more insights about the Earth.

It also means that we need more infrastructure

to support this increase in activity.

- And next episode on "Behind the Wings,"

we'll look more into how this growing space economy

is changing what's possible in space.

(upbeat music)