A high-resolution global basemap of (101955) Bennu
A high-resolution global basemap of (101955) Bennu
复制标题
DOI：
10.1016/j.icarus.2020.113690
复制
发表时间：
2021-01-28
期刊：
影响因子：
3.2
通讯作者：
Lauretta, D. S.
中科院分区：
文献类型：
--
作者：
Bennett, C. A.;DellaGiustina, D. N.;Lauretta, D. S.
2019年初，美国宇航局的OSIRIS-REx（起源，光谱解释，资源识别和安全-风化层探测器）任务用一系列仪器对小行星（101955）Bennu进行了调查，其中包括OSIRIS-REx相机套件（OCAMS） PolyCam成像仪。利用PolyCam全色图像，我们在大约5 cm的地面样本距离上构建了一个全局控制的Bennu底图，平均空间精度接近30 cm。使用明尼阿特相位角校正对底图进行光度归一化。新的制图方法被开发出来，将贝努不规则的形状和极其粗糙的表面图像组合成几乎无缝的马赛克。在这里，我们展示了Bennu的全球底图，并讨论了用于构建不规则小体的高分辨率马赛克的图像处理技术。
In early 2019, NASA's OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer) mission surveyed asteroid (101955) Bennu with a collection of instruments, including the OSIRIS-REx Camera Suite (OCAMS) PolyCam imager. Using PolyCam panchromatic images, we constructed a globally controlled basemap of Bennu at an approximate ground sample distance of 5 cm with a mean spatial accuracy of similar to 30 cm. The basemap was photometrically normalized using a Minneart phase angle correction. New mapping methods were developed to combine images of Bennu's irregular shape and extremely rough surface into a nearly seamless mosaic. Here we present the global basemap of Bennu and discuss the image processing techniques used to construct a high-resolution mosaic of an irregular small body.