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Latest Global Ozone Monitoring by Occultation of Stars Stories

Envisat Celebrates 10th Birthday
2012-03-01 10:28:16

[ Watch the Video ] In the early hours of 1 March 2002, the largest Earth observation satellite ever built soared into orbit from ESA´s launch base in Kourou, French Guiana. For a decade, Envisat has been keeping watch over our planet. The eight-ton satellite has doubled its planned five-year lifetime, circling Earth more than 50 000 times. With ten sophisticated optical and radar sensors, the satellite is continuously observing and monitoring Earth´s land, atmosphere,...

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2007-11-06 08:58:31

Watching the stars set from the surface of the Earth may be a romantic pastime but when a spacecraft does it from orbit, it can reveal hidden details about a planet's atmosphere. The technique is known as stellar occultation. Jean-Loup Bertaux, Service d'Aeronomie du CNRS, France was the first to suggest its use on an ESA mission. It works by watching stars from space, while they drop behind the atmosphere of a planet under investigation, before disappearing from view below the planet's...

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2007-10-03 10:40:00

The ozone hole over Antarctica has shrunk 30 percent as compared to last year's record size. According to measurements made by ESA's Envisat satellite, this year's ozone loss peaked at 27.7 million tonnes, compared to the 2006 record ozone loss of 40 million tonnes. Ozone loss is derived by measuring the area and the depth of the ozone hole. The area of this year's ozone hole "“ where the ozone measures less than 220 Dobson Units "“ is 24.7 million sq km, roughly the size of North...


Word of the Day
glogg
  • Scandinavian punch made of claret and aquavit with spices and raisins and orange peel and sugar.
This word comes from the Swedish 'glogg,' which is an alteration of 'glodgat,' mulled (wine).
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