File:Phoenix Lander seen from MRO during EDL2.jpg
Phoenix_Lander_seen_from_MRO_during_EDL2.jpg (260 × 260 像素,檔案大小:37 KB,MIME 類型:image/jpeg)
說明
摘要
[編輯]描述Phoenix Lander seen from MRO during EDL2.jpg |
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. |
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日期 | Image taken: 25 May 2008. Image published: 27 May 2008 | ||
來源 |
http://photojournal.jpl.nasa.gov/catalog/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 |
授權條款
[編輯]Public domainPublic domainfalsefalse |
本作品由NASA創作,屬於公有領域。根據NASA的版權政策:“NASA的創作除非另有聲明否則不受版權保護。”(參見:Template:PD-USGov/zh,NASA版權政策或JPL圖像使用政策) | ||
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目前 | 2008年5月28日 (三) 04:24 | 260 × 260(37 KB) | WolfmanSF(對話 | 貢獻) | ||
2008年5月27日 (二) 01:14 | 300 × 300(51 KB) | WolfmanSF(對話 | 貢獻) | {{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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影像標題 | converted PNM file |
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方位 | 標準 |
水平解析度 | 72 dpi |
垂直解析度 | 72 dpi |
使用軟體 | Adobe Photoshop Elements 3.0 Macintosh |
檔案修改日期時間 | 2008年5月27日 (二) 21:13 |
色彩空間 | 顏色未校準 |