Satellite technology which helps scientists observe the land
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Satellite technology which helps scientists observe the land
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Re: Satellite technology which helps scientists observe the land
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Re: Satellite technology which helps scientists observe the land
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Re: Satellite technology which helps scientists observe the land
Resolution has not been the limiting factor in turning satellite collected data into useful information that can help humans improve their use, preservation, and protection of the Earth's land and other resources. The real difference has been the dramatic drop in the cost of computing power that has enabled researchers to process massive data sets covering entire regions over time. This is generally referred to as "big data".Landsat shows us Earth from space. Since the first Landsat satellite launched in 1972, the mission has collected data on the forests, farms, urban areas and freshwater of our home planet, generating the longest continuous record of its kind.
This includes the use of technology that allows computers to examine data on scales that no human can possibly absorb. Artificial intelligence and machine learning allow our information systems to "see" a signal in data sets on the petabyte scale. Using these techniques, researchers have been able to reprocess and extract new information from data collected by LandSat and declassified CIA data collected over 40 years ago.
Two other points in regards to desertification. In addition to large scale climate change, humans cause it directly by poor land use. Unsustainable agricultural practices, deforestation, and massive diversion of rivers to supply growing populations contribute to regional land degradation.
Separately the Sahara Desert has its own expansion and contraction cycle on the order of ~7 million years. This may have been a factor in the migration of early humans into the Nile valley and the subsequent rise of the early Egyptian civilization.
If I get time, I will get you some links.
Gary C
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- GCoyote
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Re: Satellite technology which helps scientists observe the land
How scientists are using declassified military photographs to analyze historical ecological change - https://www.sciencedaily.com/releases/2 ... 112939.htm
Reveal: Cold War Spy Imagery Now Helping Fight Climate Change - https://www.esri.com/about/newsroom/blo ... y-imagery/
For the Sahara specifically see - https://en.wikipedia.org/wiki/Sahara_pump_theory
The a more radical example of unsustainable resource use consider the Aral Sea - http://www.columbia.edu/~tmt2120/introduction.htm
Gary C
Celestron Astro Master 130mm f5 Newtonian GEM
Meade 114-EQ-DH f7.9 Newtonian w/ manual GEM
Bushnell 90mm f13.9 Catadioptric
Gskyer 80mm f5 Alt/Az refractor
Jason 10x50 Binoculars
Celestron 7x50 Binoculars
Svbony 2.1x42 Binoculars
(And a bunch of stuff I'm still trying to fix or find parts for.)
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Re: Satellite technology which helps scientists observe the land
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