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Published: Sunday, July 29, 2018
The recent heat wave has transformed the lush green spaces of Wrexham into dry, yellow areas.
The images in this article were taken by the observation satellites EU Sentinel-2 of Copernicus, operated by the European Space Agency, a pair of identical craft built by Airbus who fly a "Sun Hunting" mobile orbit 500 miles above the Earth every 100 minutes and 40 seconds. As a general rule, one of the satellites will pbad to the UK every 2 or 3 days
John Murray, a researcher at the Geographic Data Science Lab of the University of Liverpool, extracted the images and processed them at the 39, free software SNAP Software help. we with copies.
John explained that data is captured in 12 different spectral frequency bands, including visible red / green / blue and nonvisible bands, including infrared. Usually, non-visible frequencies are used to monitor vegetation, weather conditions and other environmental parameters.
We have already had a brief overview of the orbital cycle of each satellite, telling us that there are 143 slightly offset paths to cover the entire planet in both directions, which takes 10 full days to finish. During this time, he spends twice on Wrexham, so with Sentinel-2B, the city is scanned 4 times in a 10-day period.
Below is a 1meg animation of the two superimposed images:
[19659003] The two separate images can be found below, and if you click on the image it will also load the huge original files too.
Greener Times:
After the Heat:
In addition to helping you understand what Wrexham looks from space, John explores satellite images to study urban environments and badyze the risks of disasters such as floods.
Other works consist mainly of studying areas of vegetation cover (carbon offsetting), types of buildings (commercial, residential, commercial, etc.), rivers and to monitor changes in urban areas .
Insurance companies better under He presented his work to Parliament in 2016, after the Carlisle floods, to study how technology can help plan and prevent future floods.
If it is not already done, we highly recommend John to follow on twitter – @MurrayData
Images / Reference Points © Copernicus Sentinel & Data OS 2018. [19659016]
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