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Ørsted is Denmark's first satellite, named after Hans Christian Ørsted (1777–1851) a Danish physicist and professor at the University of Copenhagen. It is in an almost sun synchronous low Earth orbit. After more than ten years in orbit, the Ørsted satellite is still operational, and continues to downlink accurate measurements of the Earth's magnetic field. Ørsted was constructed by a team of Danish space companies, of which CRI was prime contractor. CRI was acquired by Terma A/S before Ørsted was launched, and the daily operations are being run as a teamwork between Terma A/S and the Danish Meteorological Institute. In 2010, Ørsted passed within 500 meters of debris from the 2009 satellite collision but suffered no damage.〔(terma.com )〕 Ørsted was the first in a planned sequence of microsatellites to be flown under the now discontinued Danish Small Satellite Programme. ==Mission Objectives== The main scientific objective of the spacecraft was to map the Earth's magnetic field and collect data to determine the changes occurring in the field. Based on data from the Ørsted satellite, researchers from Danish Space Research Institute concluded that the Earth's magnetic poles are moving, and that the speed with which they are moving has been increasing for the past few years. This apparent acceleration indicates, that the poles of the Earth might be in the process of switching around, which could have serious consequences for land-based biological life. The results have been published in several prominent scientific journals, and graced the cover pages of Geophysical Research Letters,〔Purucker, M., Langlais, B., Olsen, N., Hulot, G. & Mandea, M.: The southern edge of cratonic North America: Evidence from new satellite magnetometer observations, Geophys.Res.Lett., 29(15), 8000, , 2002 (of a special issue on results from the Ørsted satellite. Plate 3 from this paper is the cover of a special Ørsted issue on August 1, 2002 (Issue #15). )〕 Nature,〔Hulot, G., Eymin, C., Langlais, B., Mandea, M. & Olsen, N.: Small-scale structure of the geodynamo inferred from Oersted and Magsat satellite data, Nature, Volume 416, Issue 6881, pp. 620-623 (April 2002)〕 and Eos.〔Neubert, T., Mandea, M., Hulot, G., von Frese, R., Primdahl, F., Jørgensen, J.L., Friis-Christensen, E., Stauning, P., Olsen, N. & Risbo, T.: Ørsted Satellite Captures High-Precision Geomagnetic Field Data, EOS, Vol. 82, No. 7, p. 81, 87, and 88, Feb. 13, 2001〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ørsted (satellite)」の詳細全文を読む スポンサード リンク
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