Long Duration Exposure Facility after deployment (cropped).jpg
NASA
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Long Duration Exposure Facility after deployment (cropped), Astronaut photography during STS-41-C, Long Duration Exposure Facility, Extracted images, Taken on
commons
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Long Duration Exposure Facility after deployment (cropped), The Long Duration Exposure Facility (LDEF) was designed by the Marshall Space Flight Center (MSFC) to test the performance of spacecraft materials, components, and systems that have been exposed to the environment of micrometeoroids and space debris for an extended period of time. The LDEF proved invaluable to the development of future spacecraft and the International Space Station (ISS). The LDEF carried 57 science and technology experiments, the work of more than 200 investigators. MSFC`s experiments included: Trapped Proton Energy Determination to determine protons trapped in the Earth's magnetic field and the impact of radiation particles; Linear Energy Transfer Spectrum Measurement Experiment which measures the linear energy transfer spectrum behind different shielding configurations; Atomic oxygen-Simulated Out-gassing, an experiment that exposes thermal control surfaces to atomic oxygen to measure the damaging out-gassed products; Thermal Control Surfaces Experiment to determine the effects of the near-Earth orbital environment and the shuttle induced environment on spacecraft thermal control surfaces; Transverse Flat-Plate Heat Pipe Experiment, to evaluate the zero-gravity performance of a number of transverse flat plate heat pipe modules and their ability to transport large quantities of heat; Solar Array Materials Passive LDEF Experiment to examine the effects of space on mechanical, electrical, and optical properties of lightweight solar array materials; and the Effects of Solar Radiation on Glasses. Launched aboard the Space Shuttle Orbiter Challenger's STS-41C mission April 6, 1984, the LDEF remained in orbit for five years until January 1990 when it was retrieved by the Space Shuttle Orbiter Columbia STS-32 mission and brought back to Earth for close examination and analysis.
commons
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STS-41-Cでの宇宙飛行士の写真撮影、長時間暴露施設、画像の引き出し、撮影
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展開後の長期曝露施設(クロップ)は、マーシャル宇宙飛行センターによって設計され、マイクロ隕石やスペースデブリの環境に長期間さらされた宇宙船の材料、コンポーネント、およびシステムのパフォーマンスをテストする。LDEFは、将来の宇宙船と国際宇宙ステーションの開発に価値がないことが証明された。LDEFは57の科学技術実験を行い、200人以上の研究者が研究を行った。MSFCの実験には、地球の磁場に閉じ込められた陽子を決定するためのトラッププロトンエネルギー決定と放射線粒子の衝突、異なる遮蔽配置の背後にある線形エネルギー伝送スペクトル測定実験、熱制御表面を原子酸素にさらしてガスによる損傷を測定し、熱制御表面試験tが含まれる。1984年4月6日にスペースシャトルオービターチャレンジャーのSTS-41Cミッションで打ち上げられ、1990年1月にスペースシャトルオービターコロンビアSTS-32ミッションによって回収され、精密検査と分析のために地球に持ち帰られるまで5年間軌道上に残った。
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perseveringly duration durative passive transport long measure meteoroid time exposure exposure public facility divulgence heat shield solar gravity orbit period atomic spectrum facility deployment deploy mechanical energy long time unfolding revealing disclosure heat content gas heat