File:PIA02863 - Jupiter surface motion animation thumbnail 720px 10fps.ogv
PIA02863_-_Jupiter_surface_motion_animation_thumbnail_720px_10fps.ogv (Ogg Theora视频文件,长度1.4秒,720 × 240像素,3.4 Mbps,文件大小:581 KB)
摘要
描述PIA02863 - Jupiter surface motion animation thumbnail 720px 10fps.ogv |
English: Original Caption Released with Image:
"The first color movie of Jupiter from NASA's Cassini spacecraft shows what it would look like to peel the entire globe of Jupiter, stretch it out on a wall into the form of a rectangular map, and watch its atmosphere evolve with time. The brief movie clip spans 24 Jupiter rotations between Oct. 31 and Nov. 9, 2000. Various patterns of motion are apparent all across Jupiter at the cloudtop level seen here. The Great Red Spot shows its counterclockwise rotation, and the uneven distribution of its high haze is obvious. To the east (right) of the Red Spot, oval storms, like ball bearings, roll over and pass each other. Horizontal bands adjacent to each other move at different rates. Strings of small storms rotate around northern-hemisphere ovals. The large grayish-blue "hot spots' at the northern edge of the white Equatorial Zone change over the course of time as they march eastward across the planet. Ovals in the north rotate counter to those in the south. Small, very bright features appear quickly and randomly in turbulent regions, candidates for lightning storms. The clip consists of 14 unevenly spaced timesteps, each a true color cylindrical projection of the complete circumference of Jupiter, from 60 degrees south to 60 degrees north. The maps are made by first assembling mosaics of six images taken by Cassini's narrow-angle camera in the same spectral filter over the course of one Jupiter rotation and, consequently, covering the whole planet. Three such global maps -- in red, green and blue filters -- are combined to make one color map showing Jupiter during one Jovian rotation. Fourteen such maps, spanning 24 Jovian rotations at uneven time intervals comprise the movie. The maps were reduced in scale by a factor of two to make them accessible on the Internet at reasonable rates. Occasional appearances of Io, Europa, and their shadows have not been removed. The smallest visible features at the equator are about 600 kilometers (about 370 miles) across. In a map of this nature, the most extreme northern and southern latitudes are unnaturally stretched out. Cassini is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the Cassini mission for NASA's Office of Space Science, Washington, D.C. This ten frames per second Theora video is downscaled to 720 pixels wide at maximum quality from original NASA GIF. |
日期 | Oct. 31 and Nov. 9, 2000 |
来源 |
http://photojournal.jpl.nasa.gov/archive/PIA02863.gif linked from http://photojournal.jpl.nasa.gov/animation/PIA02863, transcoded and downscaled to a maximum quality (10), each frame forced to be a keyframe Theora video, using programs MPlayer for Windows (version 0.6.9+SVN-r3532 using Qt 4.6.2 using MPlayer SVN r31170) and png2theora (version 1.1 binary build from 20100523) as follows: mplayer.exe -vo png PIA02863.gif use IrfanView to downscale the PNG files to 720 pixels wide to the sequence 001.png to 014.png; 20100523\png2theora.exe %03d.png --video-quality 10 --framerate-numerator 10 --framerate-denominator 1 --keyframe-freq 1 -o PIA02863_-_Jupiter_surface_motion_animation_thumbnail_720px_10fps.ogv |
作者 | NASA/JPL/University of Arizona |
授权 (二次使用本文件) |
PD-USGOV-NASA. |
其他版本 |
File:PIA02863 - Jupiter surface motion animation 1fps.ogv <-- Full size Theora video one frame per second 1800 pixels wide File:PIA02863 - Jupiter surface motion animation 10fps.ogv <-- Full size Theora video ten frames per second 1800 pixels wide File:PIA02863 - Jupiter surface motion animation.gif <-- Full size animated GIF 1799 pixels wide |
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许可协议
Public domainPublic domainfalsefalse |
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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/zh、NASA版权方针页面或JPL图片使用方针。) | ![]() |
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594,664 字节
1.4 秒
240 像素
720 像素
application/ogg
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当前 | 2010年5月29日 (六) 18:11 | 1.4秒, 720 × 240(581 KB) | 84user | == {{int:filedesc}} == {{Information |Description={{en|Original Caption Released with Image: "The first color movie of Jupiter from NASA's Cassini spacecraft shows what it would look like to peel the entire globe of Jupiter, stretch it out on a wall into |
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使用软件 | Xiph.Org libtheora 1.1 20090822 (Thusnelda) |
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