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The Hipparcos Mission: Will it be a Scientific Success?on phase on 26 November 1989. Having failed to reach its planned geostationary orbit, major revisions in the mission operations were made, and the post-launch expectations of the mission were strongly degraded with respect to the original goals — principally due to the greatly reduced observational
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Observatories in Earth Orbit and Beyond978-94-011-3454-5Series ISSN 0067-0057 Series E-ISSN 2214-7985
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Astrophysics and Space Science Libraryhttp://image.papertrans.cn/o/image/700376.jpg