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Farewell to the Earth and the Moon - ESA's Mars Express Successfully Tests Its Instruments
European Space Agency Press Release No. 44-2003 Paris, France 17 July 2003 Farewell to the Earth and the Moon -- ESA's Mars Express successfully tests its instruments A unique view of our home planet and its natural satellite -- the Moon -- is one of the first data sets coming from ESA's Mars Express. "It is very good news for the mission," says ESA's Mars Express Project Scientist, Agustin Chicarro. These and other data, such as those recording the major consituents of Earth as seen from space, are the actual proof that the instruments on board Mars Express, launched 2 June 2003, are working perfectly. The routine check-outs of Mars Express's instruments and of the Beagle-2 lander, performed during the last weeks, have been very successful. "As in all space missions little problems have arisen, but they have been carefully evaluated and solved. Mars Express continues on its way to Mars performing beautifully", comments Chicarro. The views of the Earth/Moon system were taken on 3 July 2003 by Mars Express's High Resolution Stereo Camera (HRSC), when the spacecraft was 8 million kilometres from Earth. The image taken shows true colours; the Pacific Ocean appears in blue, and the clouds near the Equator and in mid to northern latitudes in white to light grey. The image was processed by the Instrument Team at the Institute of Planetary Research of DLR, Berlin (Germany). It was built by combining a super resolution black and white HRSC snap-shot image of the Earth and the Moon with colour information obtained by the blue, green, and red sensors of the instrument. "The pictures and the information provided by the data prove the camera is working very well. They provide a good indication of what to expect once the spacecraft is in its orbit around Mars, at altitudes of only 250-300 kilometres: very high resolution images with brilliant true colour and in 3D," says the Principal Investigator of the HRSC, Gerhard Neukum, of the Freie Universität of Berlin (Germany). This camera will be able to distinguish details of up to 2 metres on the Martian surface. Another striking demonstration of Mars Express's instruments high performance are the data taken by the OMEGA spectrometer. Once at Mars, this instrument will provide the best map of the molecular and mineralogical composition of the whole planet, with 5% of the planetary surface in high resolution. Minerals and other compounds such as water will be charted as never before. As the Red Planet is still too far away, the OMEGA team devised an ingenious test for their instrument: to detect the Earth's surface components. As expected, OMEGA made a direct and unambiguous detection of major and minor constituents of the Earth's atmosphere, such as molecular oxygen, water and carbon dioxide, ozone and methane, among other molecules. "The sensitivity demonstrated by OMEGA on these Earth spectra should reveal really minute amounts of water in both Martian surface materials and atmosphere," says the Principal Investigator of OMEGA, Jean Pierre Bibring , from the Institut d'Astrophysique Spatiale, Orsay, France. The experts will carry on testing Mars Express's instruments up till the arrival to the Red Planet, next December. The scientists agree on the fact that these instruments will enormously increase our understanding of the morphology and topography of the Martian surface, of the geological structures and processes -- active now and in the past, and eventually of Mars's geological evolution. With such tools, Mars Express is also able to address the important "water" question, namely how much water there is today and how much there was in the past. Ultimately, this will also tell us whether Mars had environmental conditions that could favour the evolution of life. Note to editors The Mars Express High Resolution Stereo Camera (HRSC) was developed by the German Aerospace Centre (DLR) and built by EADS-Astrium GmbH in Friedrichshafen, Germany. The Mars Express OMEGA spectrometer was developed and built by the Institut d'Astrophysique Spatiale, Orsay, France, in cooperation with LESIA at Meudon/Paris Observatory, France, IFSI in Frascati, Italy, and IKI in Moscow, Russia. For more information about Mars Express visit: http://www.esa.int/science/marsexpress http://www.esa.int/SPECIALS/Mars_Express/ For more information about the ESA Science Programme visit: http://www.esa.int/science For more information please contact: ESA – Communication Department Media Relations Office Tel: +33(0)1 5369 7155 Fax: +33(0)1 5369 7690 Agustin Chicarro ESA – Mars Express Project Scientist Estec – Noordwijk, The Netherlands Tel: +31 71 565 3613 Email: Prof. Dr. Gerhard Neukum Mars Express HRSC Principal Investigator Freie Universität Berlin, Earth Sciences Dept., Germany Tel: +49 30 8387 0579 (secretary: -575) Email: Dr. Jean-Pierre Bibring Mars Express OMEGA Principal Investigator Institut d'Astrophysique Spatiale, Orsay, France Tel: +33 1 6985 8686 Email : Further information: ESA Media Relations Service Tel: +33.(0)1.5369.7155 Fax: +33.(0)1.5369.7690 Related articles * Beagle 2 tests successfully completed http://www.esa.int/SPECIALS/Mars_Exp...B7XO4HD_0.html * Clamps away, Mars Express eases its grip on its lander http://www.esa.int/SPECIALS/Mars_Exp...BSS1VED_0.html * Mars Express en route for the Red Planet http://www.esa.int/SPECIALS/Mars_Exp...KNS1VED_0.html * Mars Express -- ESA sets ambitious goals for the first European mission to Mars http://www.esa.int/SPECIALS/Mars_Exp...72S1VED_0.html Related links * ESA Science http://www.esa.int/esaSC/index.html IMAGE CAPTIONS: [Image 1: http://www.esa.int/export/SPECIALS/M...OXO4HD_1.html] Mars Express Earth-Moon image. On the night of 3 July 2003, the Mars Express spacecraft was pointed backwards to obtain a view of the Earth-Moon system from a distance of 8 million kilometres while on its way to Mars. This image is the first picture of planetary objects obtained by the Mars Express's High Resolution Stereo Camera (HRSC). Although the spatial resolution is low at this great distance, the picture gives a good indication of what to expect from Mars Express in its orbit around Mars. At only 250-300 kilometres above Mars, the camera will obtain very high-resolution images, in brilliant colour and impressive 3D of most of the Martian surface, at resolutions of up to 2 metres. The image was built by combining a super resolution black-and-white snap-shot image of the Earth and the Moon taken by the HRSC with colour information obtained by the blue, green, and red sensors of the instrument. Credits: Photo ESA/DLR/Freie Universität Berlin [Image 2: http://www.esa.int/export/SPECIALS/M...html#subhead1] Mars Express records the composition of the Earth's atmosphere and oceans. On the night of 3 July 2003, the Mars Express spacecraft was pointed backwards to obtain a view of the Earth-Moon system from a distance of 8 million kilometres while on its way to Mars. During a series of instrument tests, the OMEGA spectrometer on board Mars Express acquired 'spectra' of the Earth and the Moon, in visible and near-infrared light. This particular spectrum corresponds to the entire Earth's illuminated crescent, dominated by the Pacific Ocean, and indicates the molecular composition of the atmosphere, the ocean, and some continents. As the peaks in the image indicate, water (H2O) and carbon dioxide (CO2) dominate. Molecular oxygen (O2) is also identified, as well as ozone (O3), methane (CH4) and several other minor constituents. During the observations, the Earth rotated so as to offer a varying observed surface and atmospheric composition. These Earth observations by OMEGA have several unique features. In fact, OMEGA provided a global view of the Earth's disc from a high-phase angle, contrary to low-orbit observations by previous space missions. Such global disc spectra are useful not only for observations at Mars, but also to prepare future observations of Earth-like planets, such as for the Darwin mission. Credits: ESA/Institut d'Astrophysique Spatiale (Orsay, France) |
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