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Calgary, Alberta, Canada | Europe's Sentinel-2A Satellite
From the Rocky Mountains on the left to the Prairies on the right, Sentinel-2A takes us over the southern part of the Canadian province of Alberta, with part of British Columbia in the lower left.

In this image spanning some 265 km, we can see the northwest—southeast ranges of the Rockies. Moving west to east, the mountains peter out to the Canadian Prairies, with the city of Calgary in the transition zone between the two landscapes (upper-middle).

This area has naturally occurring ‘chernozem’—black soil—and is part of one of two chernozem belts in the world—the other stretching across part of eastern Europe and Russia. This fertile soil produces a high agricultural yield, evident by the numerous fields on the right side of the image.

A section of the Trans-Canada Highway is also featured, entering Calgary in a direct line from the east, and then snaking into the Rockies towards the west. Spanning over 8000 km, this coast-to-coast road travels through all 10 of Canada’s provinces and is one of the longest routes of its type.

In the upper left we can see the long, curved glacial Lake Minnewanka. Fed mainly by the Cascade River, a dam built in the 1940s raised the lake by about 30 m and submerged a resort village, as well as the previous dam built in 1912. Today, it is a popular destination for scuba divers to explore the underwater dam.

Near the western end of the lake lies the town of Banff—the site of next week’s 4th Swarm Science Meeting and North-American CryoSat Science Meeting. The two conferences taking place concurrently bring together scientists to discuss the latest results coming from the three-satellite Swarm mission on Earth’s magnetic field, as well as new information on Earth’s changing ice masses from the CryoSat satellite.

This image, also featured on the Earth from Space video program, was captured by the Copernicus Sentinel-2A satellite on August 31, 2016.

Credit: Copyright contains modified Copernicus Sentinel data (2016), processed by ESA
Release Date: March 17, 2017

+Calgary Flames
+Canadian Space Agency
+European Space Agency, ESA

#NASA #ESA #CSA #Earth #Science #Satellite #Calgary #Alberta #RockyMountains #Prairies #Canada #RemoteSensing #EarthObservation #Copernicus #Sentinel #Sentinel2A #STEM #Education
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Vojvodina, Serbia | Sentinel-2A Satellite | European Space Agency
The Copernicus Sentinel-2A satellite takes us over northern Serbia to the region of Vojvodina. The area pictured lies in the southern part of a region covered by the Pannonian Sea some 2–23 million years ago. Today, the land boasts a fertile soil—hence the plethora of agricultural fields visible as geometric shapes, reminiscent of cubist artwork.

The Tisza river snakes down from the north. Curved, brushstroke-like light green areas primarily along the east side of the river reveal its former course. Some of these areas are now used for agriculture, while others may still be too wet.

We can also see manmade waterways appearing as straight black lines—likely for draining the swamps, transportation and irrigation.

Nestled among the fields, there are a number of small towns with grid layouts. This type of city planning was invented by ancient Greece’s Hippodamus—known as the ‘father of European urban planning’.

The image captured on August 28, 2016 is clearly in false colour, and different colours indicate varying vegetative states. For example, yellowish patches indicate soil or freshly ploughed land, while shades of blue (primarily in the lower left) indicate either the same crop or different crops at a similar stage of growth.

Sentinel-2’s main instrument has 13 spectral bands, and is designed to provide images that can be used to distinguish between different crop types as well as data on numerous plant features, such as active chlorophyll content and leaf water content, all of which are essential to accurately monitor plant growth.

This kind of information helps informed decisions to be made, whether they are about deciding how much water or fertiliser is needed for a maximum harvest or for forming strategies to address climate change.

While this has obvious economic benefits, this kind of information is also important for developing countries where food security is an issue.

This image is featured on the "Earth from Space" video program.

Credit & Copyright: Copernicus Sentinel data (2016), processed by ESA, CC BY-SA 3.0 IGO
Release Date: 07/04/2017

+European Space Agency, ESA

#ESA #Earth #Science #Space #Satellite #Vojvodina #Serbia #Srbija #Србија #Sentinel #Sentinel2A #Copernicus #EarthObservation #RemoteSensing #Europe #STEM #Education
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The #Copernicus #Sentinel2A satellite takes us over #Kourou in French Guiana, with the main town of the same name visible in the lower right.

The #Sentinel2B satellite is currently poised on top of a #Vega rocket on the launch pad (upper left) about 15 km northwest of the main town, and is set for launch on 7 March 2017 at 01:49 GMT (02:49 CET).

The launch site at Kourou lies just over 500 km north of the equator and often sits under clouds. While cloudy skies may not prevent a launch, it does affect our view of the pad. The more recent passes over this area by Sentinel-2A were cloudy; this image was captured on 20 August 2016.

Once Sentinel-2B is in orbit, the two satellites will cover the entire planet between latitudes 84°S and 84°N every five days, increasing the chance of cloud-free imagery.

Follow the launch event at ESA's mission control: http://www.esa.int/Our_Activities/Observing_the_Earth/Copernicus/Sentinel-2/Sentinel2Go_launch_event_at_ESOC

Credit: contains modified Copernicus Sentinel data (2016), processed by ESA
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Thar Desert, India | European Space Agency
The Copernicus Sentinel-2A satellite brings us over northwest India with this false-color image captured on March 4, 2017. The Indian city of Bikaner is visible in the lower part of the image, surrounded by a varied landscape of agricultural structures and sand dunes.

The city lies in the Thar Desert, an arid region covering about 320,000 sq km in India and Pakistan. Most of the desert is covered by large, shifting sand dunes, some which are visible in the upper part of the image. The high winds also carry dry soils to neighbouring fertile lands, degrading them.

Archaeological evidence suggested that the region was once lush countryside, but the over-exploitation of land and water resources by humans over thousands of years drastically changed the landscape into what we see today.

In recent times, India has turned its attention to restoring the ecology and curbing the desertification of the region. For example, the Indira Gandhi Canal bringing water to the area pictured was built to keep the desert from spreading to the fertile areas, and to reclaim the land with irrigated planting projects. In this false-colour image, vegetation appears red.

Every year, June 17 marks the World Day to Combat Desertification and Drought.

ESA helps the UN Convention to Combat Desertification by providing annual global datasets on land cover and land cover changes. ESA also supports the development of operational guidelines for countries to engage in the Convention’s Land Degradation Neutrality initiative.

This image is featured on the "Earth from Space" video program.

Credit & Copyright: Contains modified Copernicus Sentinel data (2017), processed by ESA, CC BY-SA 3.0 IGO
Release Date: June 16, 2017

+European Space Agency, ESA
+NASA Earth Observatory
+United Nations

#ESA #Earth #Science #Space #Satellite #India #Desert #Thar #Bikaner #Desertification #Sand #Dunes #Copernicus #Sentinel #Sentinel2A #EarthObservation #Bhārat #Gaṇarājya #UnitedNations #STEM #Education
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Sundarbans web, Bangladesh | Sentinel-2A satellite | ESA
The Sentinel-2A satellite takes us over the very eastern part of the Sundarbans in Bangladesh, in this natural-color image. A region comprising southern Bangladesh and a small part of the Indian state of west Bengal, the whole area of the Sundarbans incorporates some 10,000 sq km, consisting of mangrove and swamp forests.

The region of the Sundarbans appears in dark shades of green in this image, while the adjacent areas in brighter colors are densely populated and dominated by agriculture.

Sundarbans is the world’s largest single chunk of tidal halophytic mangrove forest. Generally, fresh water is required for plants, but these mangrove forests can also thrive in saline water.

This area lies on the Bay of Bengal, the world’s largest bay. A number of large rivers—including the Ganges, its tributaries and various other rivers, all flow into its waters, forming the Ganges–Brahmaputra Delta.

The erosional forces of the sea and wind along the coast continuously mold the landscape, together with the huge amounts of silt and other sediments, deposited in the countless estuaries, visible in the water. Distinct throughout the image, the network of these estuaries, tidal rivers and creeks, criss-crossed by numerous channels, enclose flat, densely forested, marshy islands and agricultural plots.

Most of the delta is composed of alluvial soils made up of fine sediment that settles to the bottom as river currents slow in the estuary. The soil has large amounts of minerals and nutrients, ideal for agriculture.

These fertile floodplains host jute, tea and rice—the major crops grown in the Ganges Delta, visible as brighter patches on the land areas in the right part of the image. Fishing is also an important activity, and a major source of food for many of the inhabitants of the various towns, which we can see along the brighter areas.

The Sundarbans National Park, established in 1984 and a designated UNESCO World Heritage Site, is a core region within the Bengal Tiger Reserve. The almost extinct Bengal tiger is the national animal of Bangladesh and is considered the second largest tiger in the world.

This image—also featured on the "Earth from Space" video program—was captured by Sentinel-2A on March 18, 2016.

Credit: Contains modified Copernicus Sentinel data (2016), processed by ESA
Image Date: March 18, 2016.
Release Date: July 15, 2016

+European Space Agency, ESA 

#ESA #Space #Satellite #Earth #Sundarbans #Bangladesh #Mangrove #Forest #India #Bengal #Bay #Ganges #Sentinel
#Sentinel2A #Copernicus #Europe #RemoteSensing #EarthObservation
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Download this week's #EarthfromSpace high resolution #Sentinel2A image of #Sicily here: http://www.esa.int/spaceinimages/Images/2017/02/Sicilian_snow

Credit: contains modified Copernicus Sentinel data (2017), processed by ESA
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Download the #Copernicus #Sentinel2A image of the #ÖtztalAlps featured in this week's #EarthfromSpace: http://www.esa.int/spaceinimages/Images/2017/02/Oetztal_Alps

Credit: contains modified Copernicus Sentinel data (2016), processed by ESA
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Download this week's #EarthfromSpace high resolution image of #Bostwana, captured by #Sentinel2A:
http://www.esa.int/spaceinimages/Images/2017/03/Central_District_Botswana

Credit: contains modified Copernicus Sentinel data (2016), processed by ESA
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