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- Title
面向中国深空探测任务的行星数据系统 的设计与实现.
- Authors
李晨帆; 姚佩雯; 刘翔; 陈冰玉; 邹鸿博; 王彪; 张江; 李勃; 凌宗成; 陈圣波
- Abstract
The Planetary Data System (PDS) is an online platform where deep space mission data can be archived and released, and it is used as the basis for planetary research. Different deep space exploration missions, including Chinese“Chang ’E project”and the upcoming“Tianwen series,”have disadvantages such as complex data format conversion, inconvenient data processing, and strong professionalism; these issues hinder their application. A planetary data system (named SDU-PDS) is designed and developed in this study to manage and find the aforementioned data. Meanwhile, we attempt to design a data model to archive these planetary data in SDU-PDS.On the basis of the three-layer distribution structure of WebGIS and the object-oriented spatiotemporal data model, SDU-PDS is developed. Specifically, this system is divided into two versions: website or mobile devices. One is an online system, called“web version,”which is based on Web Graphics Library and developed by JavaScript. The other one, called mobile version, is developed on Android system through Unity3D platform. In addition, planetary data standard in this system uses Keyhole Markup Language, and the object-oriented spatiotemporal model is consistent with PDS4. Three layers of architecture, namely, data, intermediate application, and customer layers, are present in SDU-PDS. Different versions have different data transfer processes and functions in spite of same architecture. The web version can effectively store, publish, manage, and even analyze Chinese deep space exploration data. It provides a convenient data management and processing platform for researchers. The mobile version is for the general public and astrophile that integrates planetary data browsing, stacking, and 3D visualization. In this study, we made two further attempts in planetary data processing on the basis of functions on SDU-PDS website. The lunar geological map is the first attempt and is mapped out after some sophisticated steps. Various jobs, such as inversing planetary composition, devising geological unit, extracting structural objects, dating lunar basalt unit, stacking layers, and fusing information, are all indispensable. Consequently, exploring a large amount of information in this geological map, such as the lithofacies, lithology, geological structure and ages, and magmatic activity, is possible. Meanwhile, another attempt is to estimate the lunar surficial safety. We can understand the surficial relief on a smaller scale, such as meter scale, through remote sensing images. Then, factors such as terrain and distance are integrated to estimate the safety of the Chang ’E-4 landing zone and even design the rover’s path. Clearly, SDU-PDS not only can provide data services and analysis functions for scientific researchers but also can popularize knowledge of planetary science to the public to improve basic scientific literacy of citizens. By combining and optimizing the basic functions of SDU-PDS, we realize the mining and fusion of planetary data. In general, the system can meet the application requirements of Chinese deep space exploration missions to a certain extent by conducting scientific studies such as lunar geological mapping and preselection of“Chang ’E-4”safe landing areas. However, this planetary data system should be continuously developed and perfected, and the interactivity between two versions should be enhanced to explore the potential of planetary data further.
- Subjects
SCIENTIFIC literacy; GEOLOGICAL maps; PLANETARY systems; PLANETARY science; SPACE exploration; GEOLOGICAL mapping; GEOLOGICAL modeling; OBJECT-oriented databases
- Publication
Journal of Remote Sensing, 2021, Vol 25, Issue 2, p599
- ISSN
1007-4619
- Publication type
Article
- DOI
10.11834/jrs.20210157