کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8143529 | 1523934 | 2014 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Mercury׳s global shape and topography from MESSENGER limb images
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فیزیک زمین (ژئو فیزیک)
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![عکس صفحه اول مقاله: Mercury׳s global shape and topography from MESSENGER limb images Mercury׳s global shape and topography from MESSENGER limb images](/preview/png/8143529.png)
چکیده انگلیسی
We derive models for the global shape and topography of Mercury from limb images obtained by the MESSENGER spacecraft during flybys and from orbit. Crossover heights of 225 individual limb profiles were adjusted by least-squares techniques to establish a rigid global topographic network. Mercury is confirmed to possess an equatorial ellipticity and a polar oblateness. Several large impact basins and craters can be identified in the topographic model, including one basin that was earlier proposed but unconfirmed. Comparisons with absolute height data from laser altimetry indicate that the limb model appears to overestimate planetary radius by ~900Â m on average. Limb profiles and local digital terrain models derived from stereo-photogrammetry show good agreement.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Planetary and Space Science - Volume 103, 15 November 2014, Pages 299-308
Journal: Planetary and Space Science - Volume 103, 15 November 2014, Pages 299-308
نویسندگان
Stephan Elgner, Alexander Stark, Jürgen Oberst, Mark E. Perry, Maria T. Zuber, Mark S. Robinson, Sean C. Solomon,