Title Sustenance from the sands
Released: 16/10/2017
Length 00:00:26
Language English
Footage Type Animation
Copyright USGS/contains modified Coperncius Sentinel data (2016), processed by ESA
Description
Some 30 years ago, the barren landscape of Saudi Arabia’s Wadi As Sirhan basin looked like any other desert. But over time, satellites such as the US Landsats and Copernicus Sentinels saw the area transform into a vast cropland.
The fields are fed by fossil water pumped from deep underground and distributed by central-pivot irrigation systems, where long water pipes rotate around a well at the centre, creating the circular features. Created thousands of years ago when the region received more rainfall, these water reserves enable agriculture in today’s desert, but experts say this resource will eventually be exhausted.
http://www.esa.int/spaceinvideos/Videos/2017/10/Sustenance_from_the_sands
ET
Title Clouds over lava flows on Mars
Released 16/10/2017 9:00 am
Copyright ESA/Roscosmos/CaSSIS, CC BY-SA 3.0 IGO
Description
Diffuse, water-ice clouds, a hazy sky and a light breeze. Such might have read a weather forecast for the Tharsis volcanic region on Mars on 22 November 2016, when this image was taken by the ExoMars Trace Gas Orbiter.
Clouds, most likely of water-ice, and atmospheric haze in the sky are coloured blue/white in this image.
Below, 630 km west of the volcano Arsia Mons, the southernmost of the Tharsis volcanoes, outlines of ancient lava flows dominate the surface. The dark streaks are due to the action of wind on the dark-coloured basaltic sands, while redder patches are wind blown dust. A handful of small impact craters can also be seen.
The Trace Gas Orbiter, a joint effort between ESA and Roscosmos, arrived at Mars on 19 October last year. Since March it has been repeatedly surfing in and out of the atmosphere, generating a tiny amount of drag that will steadily pull it into a near-circular 400 km altitude orbit. It is expected to begin its full science operational phase from this orbit in early 2018.
Prior to this ‘aerobraking’ phase, several test periods were assigned to check the four science instrument suites from orbit and to refine data processing and calibration techniques.
The false-colour composite shown here was made from images taken with the Colour and Stereo Surface Imaging System, CaSSIS, in the near-infrared, red and blue channels.
The image is centred at 131°W / 8.5°S. The ground resolution is 20.35 m/pixel, and the image is about 58 km across. At the time the image was taken, the altitude was 1791 km, yielding a ground track speed of 1.953 km/s.
Id 384876
http://www.esa.int/spaceinimages/Images/2017/10/Clouds_over_lava_flows_on_Mars
RAPPORT DE
Y'BECCA.
Released: 16/10/2017
Length 00:00:26
Language English
Footage Type Animation
Copyright USGS/contains modified Coperncius Sentinel data (2016), processed by ESA
Description
Some 30 years ago, the barren landscape of Saudi Arabia’s Wadi As Sirhan basin looked like any other desert. But over time, satellites such as the US Landsats and Copernicus Sentinels saw the area transform into a vast cropland.
The fields are fed by fossil water pumped from deep underground and distributed by central-pivot irrigation systems, where long water pipes rotate around a well at the centre, creating the circular features. Created thousands of years ago when the region received more rainfall, these water reserves enable agriculture in today’s desert, but experts say this resource will eventually be exhausted.
http://www.esa.int/spaceinvideos/Videos/2017/10/Sustenance_from_the_sands
ET
Title Clouds over lava flows on Mars
Released 16/10/2017 9:00 am
Copyright ESA/Roscosmos/CaSSIS, CC BY-SA 3.0 IGO
Description
Diffuse, water-ice clouds, a hazy sky and a light breeze. Such might have read a weather forecast for the Tharsis volcanic region on Mars on 22 November 2016, when this image was taken by the ExoMars Trace Gas Orbiter.
Clouds, most likely of water-ice, and atmospheric haze in the sky are coloured blue/white in this image.
Below, 630 km west of the volcano Arsia Mons, the southernmost of the Tharsis volcanoes, outlines of ancient lava flows dominate the surface. The dark streaks are due to the action of wind on the dark-coloured basaltic sands, while redder patches are wind blown dust. A handful of small impact craters can also be seen.
The Trace Gas Orbiter, a joint effort between ESA and Roscosmos, arrived at Mars on 19 October last year. Since March it has been repeatedly surfing in and out of the atmosphere, generating a tiny amount of drag that will steadily pull it into a near-circular 400 km altitude orbit. It is expected to begin its full science operational phase from this orbit in early 2018.
Prior to this ‘aerobraking’ phase, several test periods were assigned to check the four science instrument suites from orbit and to refine data processing and calibration techniques.
The false-colour composite shown here was made from images taken with the Colour and Stereo Surface Imaging System, CaSSIS, in the near-infrared, red and blue channels.
The image is centred at 131°W / 8.5°S. The ground resolution is 20.35 m/pixel, and the image is about 58 km across. At the time the image was taken, the altitude was 1791 km, yielding a ground track speed of 1.953 km/s.
Id 384876
http://www.esa.int/spaceinimages/Images/2017/10/Clouds_over_lava_flows_on_Mars
RAPPORT DE
Y'BECCA.