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Impact crater recognition methods:A review

Science China Earth Sciences 2024年第6期67卷 1719-1742页

作者： Dong CHEN Fan HU Liqiang ZHANG Yunzhao WU Jianli DU Jiju PEETHAMBARAN College of Civil Engineering Nanjing Forestry UniversityNanjing 210037China Department of Geography State Key Laboratory of Remote Sensing ScienceFaculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China Purple Mountain Observatory Chinese Academy of SciencesNanjing 210023China Key Laboratory of Space Object and Debris Observation Chinese Academy of SciencesNanjing 210023China Department of Mathematics and Computing Science Saint Mary’s UniversityHalifaxNS B3H 3C3Canada

Impact craters are formed due to the high-speed collisions between small to medium-sized celestial *** is the most significant driving force in the evolution of celestial bodies,and the impact craters provide crucial insights into the formation,evolution,and impact history of celestial *** this paper,we present a detailed review of the characteristics of impact craters,impact crater remote sensing data,recognition algorithms,and applications related to impact *** first provide a detailed description of the geometric texture,illumination,and morphology characteristics observed in remote sensing data of *** we summarize the remote sensing data and cataloging databases for the four terrestrial planets(i.e.,the Moon,Mars,Mercury,and Venus),as well as the impact craters on ***,we study the advancement achieved in the traditional methods,machine learning methods,and deep learning methods applied to the classification,segmentation,and recognition of impact ***,based on the analysis results,we discuss the existing challenges in impact crater recognition and suggest some ***,we explore the implementation of impact crater detection algorithms and provide a forward-looking perspective.

关键词： terrestrial planets Deep space exploration Impact crater Impact crater recognition Deep learning

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Volcanism in the Solar System

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Science China Earth Sciences 2023年第11期66卷 2419-2440页

作者： Long XIAO Jun HUANG Zhiyong XIAO Chao QI Yuqi QIAN School of Earth Sciences China University of GeosciencesWuhan 430074China School of Atmospheric Sciences Sun Yat-sen UniversityZhuhai 519082China Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

Volcanic activity is the main process for heat-material exchange and circulation for differentiated planets. All terrestrial planets in the Solar System, the Moon, the satellites of giant planets, and the dwarf planets once experienced or are currently experiencing volcanic activities. This paper summarized the volcanism(main volcanic features and their formation) on the Moon, Mars, Venus, and Mercury in the inner Solar System, volcanism and cryovolcanism on satellites(Io, Europa,Enceladus) of giant planets, as well as volcanism on dwarf planets including Cere in the main asteroid belt and Pluto in the Kuiper belt. This work shows volcanism in the Solar System is driven by various factors, forming abundant volcanic *** has significant meanings to compare volcanism happening on different planets using comparative planetology approaches for a better understanding of volcanism, the planetary habitability, and the information contained on the origin and evolution of planets in the Solar System.

关键词： Volcanism terrestrial planets Planetary evolution Solar System

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PyMsOfa:A Python Package for the Standards of Fundamental Astronomy(SOFA)Service

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Research in Astronomy and Astrophysics 2023年第12期23卷 184-189页

作者： Jianghui Ji Dongjie Tan Chunhui Bao Xiumin Huang Shoucun Hu Yao Dong Su Wang CAS Key Laboratory of Planetary Sciences Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023China School of Astronomy and Space Science University of Science and Technology of ChinaHefei 230026China CAS Center for Excellence in Comparative Planetology Hefei 230026China

The Standards of Fundamental Astronomy(SOFA)is a service provided by the International Astronomical Union that offers algorithms and software for astronomical calculations,which was released in two versions for FORTRAN77 and ANSI C,*** this work,we implement the Python package PyMsOfa for SOFA service by three ways:(1)a Python wrapper package based on a foreign function library for Python(ctypes),(2)a Python wrapper package with the foreign function interface for Python calling C code(cffi)and(3)a Python package directly written in pure Python codes from SOFA *** package PyMsOfa has fully implemented 247 functions of the original SOFA routines released on 2023 October *** addition,PyMsOfa is also extensively examined,which is exactly consistent with those test examples given by the original *** Python package can be suitable to not only the astrometric detection of habitable planets from the Closeby Habitable Exoplanet Survey mission,but also for the frontier themes of black holes and dark matter related to astrometric calculations and other *** source codes are available via http://***/project/PyMsOfa/and https://***/CHES2023/PyMsOfa.

关键词： Astrometry and Celestial Mechanics-planets and satellites detection-planets and satellites terrestrial planets

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