月球阿波罗与嫦娥任务10个典型着陆区撞击坑数据库: 小撞击坑数据库构建与分布规律
doi: 10.11728/cjss2026.03.2025-0135 cstr: 32142.14.cjss.2025-0135
Impact Crater Database of 10 Landing Regions from Apollo and Chang’E Missions: Construction and Distribution Patterns of Small Impact Crater Databases
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摘要: 月球是撞击坑保存最完整的内太阳系天体, 拥有就位探测数据和返回样品的月球典型着陆区是认识撞击事件和撞击改造效应的重要研究对象. 其中小撞击坑对月壤的形成和演化具有重要影响, 但是现有的月球撞击坑数据库对直径<100 m的小尺度撞击坑覆盖不足. 因此, 本文筛选太阳入射角在50°~70°之间的月球高分辨率LROC NAC影像, 制作了覆盖10个着陆区20 km×20 km的镶嵌数据, 利用改进的YOLO11+SAHI深度学习模型对这10个着陆区中直径≥15 m的撞击坑进行自动提取, 经人工校验后建成了含359844条记录的撞击坑数据库. 系统构建了覆盖6个阿波罗任务与4个嫦娥任务共10个典型着陆区、直径≥15 m的撞击坑数据库, 且数据库中的撞击坑数据完整性优于现有研究. 进一步分析小尺寸撞击坑的密度分布与直径–频率分布特征. 本数据集可为月球地质年代标定、撞击通量演化、月表过程研究及样品分析提供高质量数据支持, 并为未来的撞击坑智能识别模型提供训练与验证基础.Abstract: Among the celestial bodies within the solar system, the Moon maintains the most pristine conditions of impact craters. Some landing sites on the lunar surface have in-situ exploration data and experimental measurement results from the returned samples, providing distinguished meanings to understand the impact events and their reshaping effects on the lunar surface. Small craters play a significant role in the formation and evolution of lunar regolith. However, existing lunar impact crater databases lack comprehensive coverage of small-scale impact craters with diameters less than 100 m. Therefore, this study produced ten mosaic images of 20 km×20 km in width, using the high-resolution Lunar Reconnaissance Orbiter Camera Narrow Angle Camera images acquired under solar incidence angles between 50° and 70°. These images cover ten lunar landing sites, including six Apollo missions and four Chang’E missions. An improved YOLO11+SAHI deep learning model was then applied to automatically extract craters with diameters ≥15 m within these regions. After manual verification, a high-quality crater database containing 359844 records was constructed. Compared with existing datasets, the proposed database demonstrates superior crater completeness. Based on this database, the density distribution and diameter-frequency characteristics of small-sized impact craters were further calculated and analyzed. This dataset can provide robust support for studies of lunar geological chronology, impact flux evolution, surface process, and sample interpretation. In addition, it supplies a valuable training and validation resource for future artificial intelligent models of detecting the impact craters.
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Key words:
- Small-scale impact craters /
- Moon /
- Landing sites /
- Datasets /
- Deep learning
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图 2 选取的具有不同地形与不同光照条件的三个区域. GT表示真值, Pred表示预测值. (a)(d)表示反照率较高的高地区域, 整体撞击坑尺寸较小, (b)(e)表示反照率较低的月海区域, 撞击坑尺度为中等大小, (c)(f)表示反照率较低的月海区域, 存在一些大尺度的撞击坑
Figure 2. Schematic images with different illumination and terrain character. (a) (d) Represent high-albedo elevated regions with generally smaller crater sizes. (b) (e) Represent low-albedo lunar mare regions with medium-sized impact craters. (c) (f) Represent low-albedo lunar mare regions containing some large-scale impact craters
表 1 构建训练集时选择的9个典型着陆区域的LRO NAC影像信息
Table 1. LRO NAC imagery information for the 9 landing regions where sample collection was conducted
着陆区 数据ID 分辨率/(m·pixel–1) 太阳入射角/ (°) 相位角/ (°) A11 M117338434 R 0.475 74.41 83.35 A12 M162466771 L 0.497 76.27 87.18 A14 M162426054 L 0.477 76.07 77.75 A15 M119829425 L 0.501 58.21 41.45 A16 M177535538 L 0.469 69.64 73.36 A17 M162107606 L 0.478 73.86 77.58 CE3 M1152001999 R 1.357 56.56 55.65 CE4 M1303619844 R 1.400 62.64 67.2 CE5 M1428381550 L+R 0.905 59.91 61.43 表 2 10个着陆区的镶嵌数据集范围
Table 2. Mosaic dataset coverage of ten landing regions
着陆区 纬度范围 经度范围 A11 0°20'40.75" -1°0'15.04" 23°8'35.54" -23°48'10.06" A12 –3°20'32.49"-–2°40'58.20" –23°45'7.82" -–23°5'30.18" A14 –3°58'30.17" -–3°18'55.88" –17°48'6.48" -–17°8'27.31" A15 25°48'8.91" -26°27'43.20" 3°15'59.58" -4°0'4.21" A16 –9°18'11.21" -–8°38'36.92" 15°10'2.43" -15°50'6.22" A17 19°51'39.79" -20°31'14.08" 30°25'13.16" -31°7'22.93" CE3 43°47'28.51" -44°27'2.80" –19°58'15.06" -–19°3'7.74" CE4 –45°47'14.84" -–45°7'40.55" 177°7'10.91" -178°3'36.00" CE5 42°43'33.08" -43°23'7.37" –52°22'8.01" -–51°27'58.71" CE6 –41°58'4.97" -–41°18'30.68" –154°25'36.71" -–153°32'39.61" 表 3 使用自然间断点分级法获得的10个着陆区各区间撞击坑直径区间划分以及区间内的桩径数量统计
Table 3. Statistics on the number of impact craters in each section of ten landing regions using Jenks natural breaks methods
着陆区 区间划分及撞击坑分区数量 总数量 A11 15~26 26~46 46~77 77~130 130~204 204~318 318~560 560~1534 39176 29397 6163 1810 871 447 288 162 34 A12 15~21 21~30 30~44 44~63 63~92 92~147 147~386 386~914 20598 9393 4539 2187 1635 1434 922 447 35 A14 15~21 21~32 32~49 49~76 76~141 141~272 272~472 472~1629 18564 10132 4827 2053 851 426 151 60 63 A15 15~24 24~36 36~54 54~83 83~128 128~206 206~437 437~834 27309 17678 5486 2219 1034 499 277 104 10 A16 15~27 27~44 44~72 72~121 121~197 197~320 320~615 615~1667 46889 34608 8971 2196 712 226 83 48 43 A17 15~22 22~32 32~50 50~79 79~124 124~201 201~355 355~1553 19066 11628 4355 1808 525 367 237 102 43 CE3 15~31 31~57 57~93 93~143 143~208 208~305 305~504 504~1216 31497 20297 5537 3310 1278 659 269 113 34 CE4 15~26 26~43 43~68 68~98 98~137 137~247 247~515 515~1263 57234 33968 12353 6390 2634 1226 444 195 17 CE5 15~36 36~60 60~96 96~140 140~201 201~297 297~447 447~966 56545 40650 8036 4980 1930 640 245 54 10 CE6 15~30 30~47 47~70.8 71~97 97~133 133~198 198~338 338~853 42966 25458 11226 3018 1608 927 466 194 35 注 第一列为着陆区名称, 每个着陆区对应数据的第一行为Jenks划分直径区间(单位: m), 第二行为各区间内统计的撞击坑数量, 最后一竖列为着陆区内撞击坑总数量. 表 4 参与训练的9个着陆点数据集详细信息及模型在其测试集上的准确率
Table 4. Detailed information on the nine landing site datasets used in training and the model’s accuracy on their test sets
着陆区 数据ID 标签数量 精确率 召回率 F1-score A11 M117338434 R 1178 0.964 0.933 0.948 A12 M162466771 L 1131 0.938 0.902 0.919 A14 M162426054 L 1321 1 0.919 0.958 A15 M119829425 L 1282 0.993 0.939 0.965 A16 M177535538 L 3073 0.985 0.996 0.990 A17 M162107606 L 1823 1 0.964 0.982 CE3 M1152001999 R 1279 1 0.963 0.981 CE4 M1303619844 R 20785 0.993 0.915 0.952 CE5 M1428381550 L+R 5598 0.988 0.929 0.959 均值 0.985 0.94 0.962 表 5 10个着陆区检测到的撞击坑直径统计信息
Table 5. Statistical information on crater diameters detected across ten landing regions
着陆区 最小直径/m 最大直径/m 完整性直径/m 大于完整性直径的数量 A11 15 2239 22 14389 A12 15 1609 21 10023 A14 15 1641 21 7971 A15 15 3740 23 10808 A16 15 1817 22 19990 A17 15 2488 20 9184 CE3 15 1216 21 16975 CE4 15 1483 21 31203 CE5 15 965 26 26242 CE6 15 852 28 19618 表 6 10个着陆点所在地质单元的撞击坑密度和地质背景
Table 6. Impact crater density and geological background of the address units where the ten landing sites are located
着陆区 单个地质单元
面积/km2单个地质单元
撞击坑数量撞击坑密度/km–2 年龄 地质单元 地质单元起伏情况 A11 400 39176 97.94 3.58~3.85 Ga[28] 静海 平坦 A12 400 20595 51.49 3.15~3.22 Ga[28] 风暴洋月海平原 平坦 A14 400 18564 46.41 3.77~3.85 Ga[28] 弗拉·摩罗高地 崎岖 A15 247 20331 82.31 3.28~3.33 Ga[28] 靠近盆缘高地的月海平原 平坦 A16 400 46889 117.22 3.77~3.85 Ga[28] 笛卡尔高地 崎岖 A17 139 9560 68.78 3.5~3.85 Ga[28] 靠近高地的月海平原 相对平坦 CE3 342 27685 80.95 2~3 Ga[29] 虹湾月海平原 相对平坦 CE4 117 13653 116.69 2.95~3.67 Ga[30] 被溅射物覆盖的月海平原 相对崎岖 CE5 400 56545 141.36 2.03 Ga[31] 月海平原 相对平坦 CE6 400 42966 107.42 2.83 Ga[32] 月海平原 平坦 -
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刘方超 男, 1992年10月出生于山东省潍坊市, 现为山东大学空间科学与技术学院, 博士研究生, 主要研究方向为行星科学与大数据
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