• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Planetary and space science >The northern hemisphere of asteroid (21) Lutetia-topography and orthoimages from Rosetta OSIRIS NAC image data
【24h】

The northern hemisphere of asteroid (21) Lutetia-topography and orthoimages from Rosetta OSIRIS NAC image data

机译：小行星的北半球（21）Lutetia地形和来自Rosetta OSIRIS NAC图像数据的正射像

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

During the flyby at asteroid (21) Lutetia by the Rosetta spacecraft in July 2010, the OSIRIS imaging system onboard acquired several hundred images of Lutetia's surface. Images of the OSIRIS NAC (Narrow Angle Camera) comprise up to 60 m/pixel ground resolution. We analyzed 84 multi-spectral NAC images with stereo-photogrammetric methods. A 3D point control network within a photogram-metric block adjustment was used to derive improved orientation data (pointing and position) for the Rosetta spacecraft as well as corrections of the pre-flight estimates of Lutetia's position in space. For the generation of a digital terrain model (DTM), we selected a subset of 10 OSIRIS NAC images within a multi-image matching process. We combined the matching results with the adjusted orientation data and derived more than 12 million of surface points with a 3D point accuracy of ～40 m (2/3 pixel) and a vertical component of that of ～15 m (1 /4 pixel). The 3D surface points were converted to a final 60 m raster DTM, which covers about 78% of the entire northern hemisphere. All 84 NAC images were then ortho-rectified on the basis of the improved orientation and the DTM. Thus, orthoimage products with sub-pixel registration accuracy are available for multi-spectral mapping of the surface of Lutetia. Finally, the DTM was textured with an orthoimage mosaic to form a VRML dataset for full-resolution interactive 3D investigations.
机译：2010年7月，罗塞塔号飞船在Lutetia小行星（21）上飞越时，机载OSIRIS成像系统获取了Lutetia表面的数百张图像。 OSIRIS NAC（窄角相机）的图像具有高达60 m /像素的地面分辨率。我们用立体摄影测量法分析了84张多光谱NAC图像。摄影测量块调整中的3D点控制网络用于导出Rosetta航天器的改进的定向数据（指向和位置）以及对Lutetia在太空中位置的飞行前估计值的校正。为了生成数字地形模型（DTM），我们在多图像匹配过程中选择了10张OSIRIS NAC图像的子集。我们将匹配结果与调整后的方向数据相结合，得出了超过1200万个表面点，其3D点精度为〜40 m（2/3像素），垂直分量为〜15 m（1/4像素） 。将3D表面点转换为最终的60 m栅格DTM，该DTM覆盖了整个北半球的约78％。然后根据改进的方向和DTM对所有84张NAC图像进行正射校正。因此，具有亚像素配准精度的正射影像产品可用于Lutetia表面的多光谱映射。最后，将DTM贴上正射影像马赛克，以形成用于全分辨率交互式3D研究的VRML数据集。

著录项

  • 来源
    《Planetary and space science》 |2012年第1期|p.54-63|共10页
  • 作者

    Frank Preusker; Frank Scholten; Joerg Knollenberg; Ekkehard Kuehrt; Klaus-Dieter Matz; Stefano Mottola; Thomas Roatsch; Nick Thomas;

  • 作者单位

    German Aerospace Center, Institute of Planetary Research, D-12489 Berlin, Germany;

    German Aerospace Center, Institute of Planetary Research, D-12489 Berlin, Germany;

    German Aerospace Center, Institute of Planetary Research, D-12489 Berlin, Germany;

    German Aerospace Center, Institute of Planetary Research, D-12489 Berlin, Germany;

    German Aerospace Center, Institute of Planetary Research, D-12489 Berlin, Germany;

    German Aerospace Center, Institute of Planetary Research, D-12489 Berlin, Germany;

    German Aerospace Center, Institute of Planetary Research, D-12489 Berlin, Germany;

    University of Bern, Space Research and Planetology Division, Bern, Switzerland;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    lutetia; asteroid; rosetta; OSIRIS; digital terrain models; orthoimages;

    机译：黄体;小行星;罗塞塔;OSIRIS;数字地形模型;正射像;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号