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File:Phoenix Lander seen from MRO during EDL2.jpg

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Phoenix_Lander_seen_from_MRO_during_EDL2.jpg (260 × 260像素,文件大小:37 KB,MIME类型:image/jpeg


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English: NASA's Mars Phoenix Lander can be seen parachuting down to Mars, in this image captured by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter. This is the first time that a spacecraft has imaged the final descent of another spacecraft onto a planetary body. Mars Reconnaissance Orbiter pointed its HiRISE obliquely toward Phoenix shortly after it opened its parachute while descending through the Martian atmosphere. The image reveals an apparent 10-meter-wide (30-foot-wide) parachute fully inflated. The bright pixels below the parachute show a dangling Phoenix. The image faintly detects the chords attaching the backshell and parachute. The surroundings look dark, but correspond to the fully illuminated Martian surface, which is much darker than the parachute and backshell.

Phoenix deployed its parachute at an altitude of about 12.6 kilometers (7.8 miles) and a velocity of 1.7 times the speed of sound. Given the position and pointing angle of MRO, Phoenix is at about 13 km above the surface, just a few seconds after the parachute opened. This image shows some details of the parachute, including the gap between upper and lower sections. At the time of this observation, MRO had an orbital altitude of 310 km, traveling at a ground velocity of 3.4 kilometers/second, and a distance of 760 km to the Phoenix lander.

The HiRISE acquired this image on May 25, 2008, at 4:36 p.m. Pacific Time (7:36 p.m. Eastern Time). It is a highly oblique view of the Martian surface, 26 degrees above the horizon, or 64 degrees from the normal straight-down imaging of Mars Reconnaissance Orbiter. The image has a scale of 0.76 meters per pixel.

The NASA image has been altered by cropping, increasing the linear pixel density by a factor of two, and conversion from TIFF to JPG format.
日期 Image taken: 25 May 2008. Image published: 27 May 2008
来源

http://photojournal.jpl.nasa.gov/catalog/PIA10705

本图像或视频收录于美国国家航空航天局 (NASA)喷气推进实验室(Jet Propulsion Laboratory),其照片编号是: PIA10705

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作者 NASA/Jet Propulsion Lab-Caltech/University of Arizona
其他版本 http://commons.wikimedia.org/wiki/Image:Phoenix_Lander_seen_from_MRO_during_EDL.jpg

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Public domain 本文件完全由NASA创作,在美国属于公有领域。根据NASA的版权方针,NASA的材料除非另有声明否则不受版权保护。(参见Template:PD-USGov/zhNASA版权方针页面JPL图片使用方针。)
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当前2008年5月28日 (三) 04:242008年5月28日 (三) 04:24版本的缩略图260 × 260(37 KB)WolfmanSF
2008年5月27日 (二) 01:142008年5月27日 (二) 01:14版本的缩略图300 × 300(51 KB)WolfmanSF{{Information |Description=English: NASA's Mars Phoenix Lander can be seen parachuting down to Mars, in this image captured by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter. This is the first time tha

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