|
|
The first Envisat check-up on the Earth 
A major new health check on the Earth got under way on 1 March, when the European Space Agency’s Envisat satellite was launched by an Ariane 5 rocket from Europe’s spaceport in French Guiana. It is the largest and most sophisticated Earth observation satellite ever built. Following the launch and deployment of the solar panel and antennas, the ten instruments on board the satellite were turned on and verified one by one: all are operating nominally. The satellite is performing well and providing measurements of the atmosphere, ocean, land and ice, providing a new, enhanced perspective on questions related to global environmental monitoring and climate change. Envisat will reveal new data and build further on the information gathered over the past ten years by ESA’s ERS-1 and ERS-2 satellites, which has given important insights into the impact of human activity on the environment and put issues such as ozone depletion and pollution on the agenda of decision-makers and the media.
The first data available from the satellite were acquired via the Kiruna station in Sweden and processed at the ESA/ESRIN establishment and processing and archiving centres throughout Europe.
The data acquired by Envisat and the ERS data since 1992 show the retreat of the Larsen B and other ice shelves, an important indicator of climate change in polar regions.
These observations are of significance not only to our understanding of ice dynamics and ice/climate interactions, but also to that of global ocean circulation, as ice shelves play an important role in the production of bottom water.
Among the ten instruments on board Envisat, MERIS (Medium-Resolution Imaging Spectrometer) detected phytoplankton concentration and measured chlorophyll concentration over the West African region during the first few days of its operations.
The observing capabilities of the MERIS spectrometer, together with the synergistic use of various other instruments on board Envisat, will provide very accurate measurements of sea surface temperature and help understanding of interactions between wind, temperature and phytoplankton growth. Through Envisat, Europe has acquired a powerful new means of monitoring key issues related to global environment and climate change. The satellite will enhance monitoring capabilities, provide information for warning and mitigation of climate change, and make precise measurements of the Earth to manage the implementation of major international environmental conventions such as the Kyoto Protocol, under which Europe has recently undertaken to reduce greenhouse gas emissions by 8% from 1990 levels by 2008-2012. Information for Editors Envisat, weighing 8000 kilos and as big as a bus, is orbiting in an Earth polar orbit at 800 km altitude and is an automatic space observatory with ten highly sophisticated instruments observing the Earth. Envisat will serve a vast community of users, delivering data products for Earth science research, development of pilot application projects, public services and commercial uses. Designed for 5 years’ operation in orbit, Envisat is the leading satellite supporting the European initiative for Global Monitoring for Environment and Security (GMES). Further information and high-resolution Envisat images are available on the ESA web portal at http://www.esa.int/envisat Project information is available on the dedicated Envisat website http://envisat.esa.int
For further information, please contact:
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
