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McBarron JW nd 《Acta Astronautica》1994,32(1):75-78
This paper identifies and describes the prebreathe protocol currently used by the U.S. Space Shuttle Program to provide astronauts the capability to safely perform extravehicular activity. A comparison of planned vs actual prebreathe experience through the STS-37 Mission is also provided. 相似文献
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McBarron JW nd 《Acta Astronautica》1994,32(1):5-14
This paper provides an overview and summary of U.S. extravehicular activity accomplishments of the last 26 years, Space Shuttle missions having scheduled extravehicular activities to be performed over the next several years, extravehicular activities expected to be necessary to support Space Station Freedom assembly tasks and operations, and potential extravehicular activity roles of the NASA Space Exploration Initiative Program. 相似文献
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Satellite passive intermodulation: systems considerations 总被引:1,自引:0,他引:1
Boyhan J.W. Henzing H.F. Koduru C. 《IEEE transactions on aerospace and electronic systems》1996,32(3):1058-1064
Passive intermodulation (PIM) occurring in multicarrier transmission systems can have deleterious effects on system performance by significantly increasing the noise level. An argument is presented for system-level testing for PIM, particularly for high-power communications satellites. In the past, two-carrier, component-level tests were employed to ensure that PIM would not degrade system S/N performance 相似文献
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