HIGH PRECISION DTM AND DOM GENERATING USING MULTI-SOURCE ORBITAL DATA ON CHANG’E-4 LANDING SITE

International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences

Liu, B.^1¹ 

[1] State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, China^1

关键词: Chang’e-4 Landing Site;    Digital Terrain Model;    Digital Orthophoto Map;    Multi-source Data;    DTM Fusion;    Lunar Orbital Imagery;   

DOI  :  10.5194/isprs-archives-XLII-2-W13-1413-2019

学科分类：地球科学(综合)

来源: Copernicus Publications

【 摘 要 】

Chang’e-4 (CE-4) has successfully soft landed in Von Kármán crater inside the South Pole-Aitken (SPA) basin at 10:26 am on January 3, 2019. High precision landing site mapping plays an essential role in mission operations and science applications before and after landing. In this paper, we propose a novel method for generating the highest resolution and the best precision Digital Terrain Model (DTM) and Digital Orthophoto Map (DOM) of the CE-4 landing area using available multi-source data. First, the CE-2 DTM is co-registered to SLDEM2015. Then the vertical inconsistencies of the co-registered DTMs are analysed and the biases of CE-2 DTM with respect to SLDEM2015 are erased. Finally, a new DTM with more information and better precision is generated by fusion of the co-registered DTMs. Using the new DTM as a reference, a seamless DOM is generated based on block adjustment of projected imagery, which can reduce the inconsistencies among the corrected images to sub-pixel level. As a result, a DTM of the Von Kármán crater area ( 42º S–48° S/172º E–180° E) and a seamless DOM covering an area of 2.3° in longitude and 1° in latitude with a ground sample distance of 0.9 m are generated using the developed method.

【 授权许可】

CC BY