File:PIA13164 North Polar Cap Cross Section.jpg
原始檔案 (1,936 × 939 像素,檔案大小:562 KB,MIME 類型:image/jpeg)
說明
摘要
[編輯]描述PIA13164 North Polar Cap Cross Section.jpg |
English: This image shows a cross-section of a portion of the north polar ice cap of Mars, derived from data acquired by the Mars Reconnaissance Orbiter's Shallow Radar (SHARAD), one of six instruments on the spacecraft.
The data depict the region's internal ice structure, with annotations describing different layers. The ice depicted in this graphic is approximately 2 kilometers (1.2 miles) thick and 250 kilometers (155 miles) across. White lines show reflection of the radar signal back to the spacecraft. Each line represents a place where a layer sits on top of another. Scientists study how thick the pancake-like layers are, where they bulge and how they tilt up or down to understand what the surface of the ice sheet was like in the past as each new layer was deposited. |
日期 | (published) |
來源 | Catalog page · Full-res (JPEG · TIFF) |
作者 | NASA/JPL-Caltech/ASI/UT |
其他版本 |
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This media is a product of the Mars Reconnaissance Orbiter mission Credit and attribution belongs to the Shallow Subsurface Radar (SHARAD) team, NASA/JPL-Caltech/ASI/UT |
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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原始上傳日誌
[編輯]日期/時間 | 尺寸 | 使用者 | 備註 |
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2010-09-20 13:18 | 1936×939× (575535 bytes) | Schaffman | {{Information |Description = Radargram of Polar Cap |Source = JPL Photojournal |Date = ~~~~~ |Author = Italian space Agency |Permission = JLP Public Use Policy |other_versions = }} |
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日期/時間 | 縮圖 | 尺寸 | 使用者 | 備註 | |
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目前 | 2017年3月4日 (六) 09:23 | 1,936 × 939(562 KB) | PhilipTerryGraham(留言 | 貢獻) | Transferred from en.wikipedia |
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