File:Venus Topo North, 776-,663,-113.jpg
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[編輯]描述Venus Topo North, 776-,663,-113.jpg |
English: Hemispheric View of Venus Centered at the North Pole
Original Caption Released with Image: The hemispheric view of Venus, as revealed by more than a decade of radar investigations culminating in the 1990-1994 Magellan mission, is centered on the North Pole. The Magellan spacecraft imaged more than 98% of Venus at a resolution of about 100 meters; the effective resolution of this image is about 3 km. A mosaic of the Magellan images (most with illumination from the west) forms the image base. Gaps in the Magellan coverage were filled with images from the Earth-based Arecibo radar in a region centered roughly on 0 degree latitude and longitude, and with a neutral tone elsewhere (primarily near the south pole). The composite image was processed to improve contrast and to emphasize small features, and was color-coded to represent elevation. Gaps in the elevation data from the Magellan radar altimeter were filled with altimetry from the Venera spacecraft and the U.S. Pioneer Venus missions. An orthographic projection was used, simulating a distant view of one hemisphere of the planet. The Magellan mission was managed for NASA by Jet Propulsion Laboratory (JPL), Pasadena, CA. Data processed by JPL, the Massachusetts Institute of Technology, Cambridge, MA, and the U.S. Geological Survey, Flagstaff, AZ. |
日期 | |
來源 | http://photojournal.jpl.nasa.gov/catalog/PIA00007 |
作者 | NASA/JPL/USGS |
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[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 | 2012年1月31日 (二) 17:17 | 4,064 × 4,064(4.38 MB) | Lotse(對話 | 貢獻) | {{Information |Description ={{en|1='''Hemispheric View of Venus Centered at the North Pole''' Original Caption Released with Image: The hemispheric view of Venus, as revealed by more than a decade of radar investigations culminating in the 1990-1994 |
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