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bearnard123
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Space technology that can help us preserve our environment on Earth

Fri Apr 02, 2021 10:27 am

Have you heard about a special type of microsatellites that can observe environmental changes like sea level or melting of glaciers? With the help of that technology, scientists can approach the solution how to avoid global warming. Moreover, there is even a special type of sats that can track rare species of animals to prevent them from being killed by poachers.
 
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flyingturtle
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Re: Space technology that can help us preserve our environment on Earth

Fri Apr 02, 2021 10:38 am

Well, we have radar satellites since a very long time. The newest ones are approaching an accuracy of several centimeters. They can measure soil erosion, glacier melting, water levels...

bearnard123 wrote:
Moreover, there is even a special type of sats that can track rare species of animals to prevent them from being killed by poachers.


For example, there are whales and sharks that are equipped with data loggers that report back GPS position and diving time/depth to researchers, via a satellite connection.

But analysis of satellite imagery is certainly helping biologists to estimate loss of habitats. For example, different kinds of vegetation has a different light reflection/absorption.
 
bearnard123
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Re: Space technology that can help us preserve our environment on Earth

Fri Apr 02, 2021 1:01 pm

flyingturtle wrote:
Well, we have radar satellites since a very long time. The newest ones are approaching an accuracy of several centimeters. They can measure soil erosion, glacier melting, water levels...

bearnard123 wrote:
Moreover, there is even a special type of sats that can track rare species of animals to prevent them from being killed by poachers.


For example, there are whales and sharks that are equipped with data loggers that report back GPS position and diving time/depth to researchers, via a satellite connection.

But analysis of satellite imagery is certainly helping biologists to estimate loss of habitats. For example, different kinds of vegetation has a different light reflection/absorption.

Yeah, that is a good point. I`ve heard that some species of animals are tracked from space by microsatellites. This is a great way to prevent them from dying out and protect them from poachers.
 
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flyingturtle
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Re: Space technology that can help us preserve our environment on Earth

Fri Apr 02, 2021 4:18 pm

And don't forget that technology is not the best solution. It's electing responsible people into office. People who have a focus on the Earth as it will be in 200 or 300 years - not just 2024, when the next election is due.
 
Nean1
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Re: Space technology that can help us preserve our environment on Earth

Fri Apr 02, 2021 11:35 pm

bearnard123 wrote:
Have you heard about a special type of microsatellites that can observe environmental changes like sea level or melting of glaciers? With the help of that technology, scientists can approach the solution how to avoid global warming. Moreover, there is even a special type of sats that can track rare species of animals to prevent them from being killed by poachers.


The Global Warming narrative assumes that a molecule (CO2) that represents 1: 2600 parts of the atmosphere controls the entire climate of the Earth. This is as scientific as homeopathy.

Then, starting from a false premise, we will rush in search of fanciful solutions. Caution.
 
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flyingturtle
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Re: Space technology that can help us preserve our environment on Earth

Sat Apr 03, 2021 7:18 am

Nean1 wrote:
bearnard123 wrote:
Have you heard about a special type of microsatellites that can observe environmental changes like sea level or melting of glaciers? With the help of that technology, scientists can approach the solution how to avoid global warming. Moreover, there is even a special type of sats that can track rare species of animals to prevent them from being killed by poachers.


The Global Warming narrative assumes that a molecule (CO2) that represents 1: 2600 parts of the atmosphere controls the entire climate of the Earth. This is as scientific as homeopathy.

Then, starting from a false premise, we will rush in search of fanciful solutions. Caution.


Wishful thinking of a scientific illiterate.
 
GDB
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Re: Space technology that can help us preserve our environment on Earth

Sat Apr 03, 2021 2:43 pm

flyingturtle wrote:
And don't forget that technology is not the best solution. It's electing responsible people into office. People who have a focus on the Earth as it will be in 200 or 300 years - not just 2024, when the next election is due.


As shown by decades of research by NASA and it's partners such as NOAA, other space agencies, then you have lobbyists for big oil etc, pretending to be lawmakers, bringing in with the case of an even dimmer than usual one, from OK, a snowball!
(At my average British state school nearly 40 years ago, global warming, the causes, was taught in science. Maybe we just did not spend any time saluting flags).
 
WIederling
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Re: Space technology that can help us preserve our environment on Earth

Sun Apr 04, 2021 5:31 pm

Nean1 wrote:
bearnard123 wrote:
Have you heard about a special type of microsatellites that can observe environmental changes like sea level or melting of glaciers? With the help of that technology, scientists can approach the solution how to avoid global warming. Moreover, there is even a s
pecial type of sats that can track rare species of animals to prevent them from being killed by poachers.


The Global Warming narrative assumes that a molecule (CO2) that represents 1: 2600 parts of the atmosphere controls the entire climate of the Earth. This is as scientific as homeopathy.

Then, starting from a false premise, we will rush in search of fanciful solutions. Caution.


Go back to your valley of extinction? :-)
 
mxaxai
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Re: Space technology that can help us preserve our environment on Earth

Mon Apr 05, 2021 1:10 pm

Satellites are sensors, a necessary component to solve a problem but not sufficient by itself.

They're great for worldwide surveying, gathering data from remote places 24/7. With satellites, you can easily determine the worldwide ice coverage or changes in sea level. They can also be used to determine vegetation, cloud coverage or the composition of the atmosphere.

Without data, scientists would be forced to guess or rely on theoretical predictions. So satellites are essential to help us understand how humans interact with their environment (and also monitor environmental changes without human influence such as geological processes).

But even with data, we need to develop solutions to counteract the observed changes and we also need to decide to implement these solutions. Gathering data is mostly scientific while solutions are usually created by engineers, and it's politicians and management who create laws and organisations that enable widespread application.

There are some phenomena where we lack the ability to intervene but which we can easily observe, e. g. solar activity cycles. There are others that are difficult to measure or predict, like volcanic eruptions. Finally, there are problems like climate change, deforestation or poaching that are easy to observe and easy to solve but that remain problems for political, economical or social reasons. These can only be solved if we elect politicians that accept new data and are willing to act accordingly. There are some, however, who would rather "solve" them by simply not measuring.
 
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flyingturtle
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Re: Space technology that can help us preserve our environment on Earth

Mon Apr 05, 2021 1:46 pm

Maybe we could create a giant orbiting sunshade out of our copious space junk...
 
GDB
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Re: Space technology that can help us preserve our environment on Earth

Tue Apr 06, 2021 8:34 am

Many who became concerned about the environment cite this famous pic as an inspiration, notable that in pure science terms the picture itself had little value, it was not even the first taken of Earth from that vantage point, it was however taken by a human;
https://en.wikipedia.org/wiki/Earthrise
 
VSMUT
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Re: Space technology that can help us preserve our environment on Earth

Tue Apr 06, 2021 9:12 am

Food production is probably the field that will have the greatest impact. Various farming methods developed for use in long-distance space transport and habitats on the moon and mars will require less space, so will have to tackle a number of challenges that on earth emit a lot of greenhouse gasses. Artificial meats, hydroponics, overall just growing more in less space, using less energy.
 
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Nomadd
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Re: Space technology that can help us preserve our environment on Earth

Tue Apr 06, 2021 2:28 pm

flyingturtle wrote:
Maybe we could create a giant orbiting sunshade out of our copious space junk...

On purpose?
 
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flyingturtle
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Re: Space technology that can help us preserve our environment on Earth

Tue Apr 06, 2021 7:04 pm

Nomadd wrote:
flyingturtle wrote:
Maybe we could create a giant orbiting sunshade out of our copious space junk...

On purpose?


Yes. A reversed Dyson sphere...
 
744SPX
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Re: Space technology that can help us preserve our environment on Earth

Tue Apr 06, 2021 7:52 pm

Combine all that space junk with Starlink, and we are well on are way to a reverse Dyson sphere.
 
bearnard123
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Re: Space technology that can help us preserve our environment on Earth

Wed Apr 07, 2021 8:10 am

Perhaps, I didn't express myself correctly enough. I just wanted to mention that there are special types of microsatellites that observe mountains or glaciers to help scientists in some work of environmental protection. I`ve read an article about Harnessing Space Technology to Monitor Coral Reef Bleaching
Scientists can monitor such effects as they unfold in unprecedented detail. Experimental deep-learning algorithms and small satellites can be utilised to monitor the coral reef climate in near real time.
 
 
bearnard123
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Re: Space technology that can help us preserve our environment on Earth

Wed Apr 07, 2021 10:26 am

mxaxai wrote:

Yeah, satellites like that. As we can see those satellites ( environmental observation ) are rather popular and they are manufactured by different space companies. But there is one drawback. The lifespam of these microsatellites is not really large.
 
mxaxai
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Re: Space technology that can help us preserve our environment on Earth

Wed Apr 07, 2021 11:41 am

bearnard123 wrote:
But there is one drawback. The lifespam of these microsatellites is not really large.

It's a rather minor drawback. These small satellites can be mass produced. By replacing them every few years, the manufacturer can implement improvements regularly. It also means that less radiation hardening is required, the electronics don't need to survive for 20+ years. If a satellite does fail prematurely, it'll deorbit by itself quickly and can be replaced with the next launch.

Large observation satellites like Sentinel-2A/B cost ~$ 200 million each, while I would estimate Planetlab's cubesats at around $0.5 - 2 million per launched satellite.

With their short lifespan, these cubesats avoid becoming space junk.
 
bearnard123
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Re: Space technology that can help us preserve our environment on Earth

Wed Apr 07, 2021 2:19 pm

mxaxai wrote:
bearnard123 wrote:
But there is one drawback. The lifespam of these microsatellites is not really large.

It's a rather minor drawback. These small satellites can be mass produced. By replacing them every few years, the manufacturer can implement improvements regularly. It also means that less radiation hardening is required, the electronics don't need to survive for 20+ years. If a satellite does fail prematurely, it'll deorbit by itself quickly and can be replaced with the next launch.

Large observation satellites like Sentinel-2A/B cost ~$ 200 million each, while I would estimate Planetlab's cubesats at around $0.5 - 2 million per launched satellite.

With their short lifespan, these cubesats avoid becoming space junk.

Taking into considaration the number of space debris we are having at that moment and that this space junk became an issue for space companies that are afraid of their spacecrafts can be damaged by the space junk we have in the orbit of Earth. Short live spam of these microsatellites the lifespan of which are not very long, (after the death, they stay in the orbit) plays an important but not very pleasent role in that issue.

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