File:PIA13164 North Polar Cap Cross Section.jpg

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原始檔案(1,936 × 939 像素,檔案大小:562 KB,MIME 類型:image/jpeg


摘要

描述
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
本圖像或影音收錄於美國國家航空暨太空總署 (NASA)噴射推進實驗室(Jet Propulsion Laboratory),其照片編號為: PIA13164

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其他語言:
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

Public domain 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/zhNASA版權政策JPL圖像使用政策
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原始上傳日誌

The original description page was here. All following user names refer to en.wikipedia.
日期/時間 尺寸 用戶 備⁠註
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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目前2017年3月4日 (六) 09:23於 2017年3月4日 (六) 09:23 版本的縮圖1,936 × 939(562 KB)PhilipTerryGrahamTransferred from en.wikipedia

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