To improve our understanding of the formation and evolution of the Moon, one of the payloads onboard the Chang＇e-3 （CE-3） rover is Lunar Penetrating Radar （LPR）. This investigation is the first attempt to explore...To improve our understanding of the formation and evolution of the Moon, one of the payloads onboard the Chang＇e-3 （CE-3） rover is Lunar Penetrating Radar （LPR）. This investigation is the first attempt to explore the lunar subsurface structure by using ground penetrating radar with high resolution. We have probed the subsur- face to a depth of several hundred meters using LPR. In-orbit testing, data processing and the preliminary results are presented. These observations have revealed the con- figuration of regolith where the thickness of regolith varies from about 4 m to 6 m. In addition, one layer of lunar rock, which is about 330 m deep and might have been accumulated during the depositional hiatus of mare basalts, was detected.展开更多
The Yutu-2 rover onboard the Chang’E-4 mission performed the first lunar penetrating radar detection on the farside of the Moon.The high-frequency channel presented us with many unprecedented details of the subsurfac...The Yutu-2 rover onboard the Chang’E-4 mission performed the first lunar penetrating radar detection on the farside of the Moon.The high-frequency channel presented us with many unprecedented details of the subsurface structures within a depth of approximately 50 m.However,it was still difficult to identify finer layers from the cluttered reflections and scattering waves.We applied deconvolution to improve the vertical resolution of the radar profile by extending the limited bandwidth associated with the emissive radar pulse.To overcome the challenges arising from the mixed-phase wavelets and the problematic amplification of noise,we performed predictive deconvolution to remove the minimum-phase components from the Chang’E-4 dataset,followed by a comprehensive phase rotation to rectify phase anomalies in the radar image.Subsequently,we implemented irreversible migration filtering to mitigate the noise and diminutive clutter echoes amplified by deconvolution.The processed data showed evident enhancement of the vertical resolution with a widened bandwidth in the frequency domain and better signal clarity in the time domain,providing us with more undisputed details of subsurface structures near the Chang’E-4 landing site.展开更多
The authors apologize for the erroneous transcription of the average chemical composition data of Apollo lunar soil samples in Table 4.The difference in chemical composition between lunar regolith simulants and actual...The authors apologize for the erroneous transcription of the average chemical composition data of Apollo lunar soil samples in Table 4.The difference in chemical composition between lunar regolith simulants and actual lunar samples is an important indicator for evaluating their similarity.For comparison,Table 4 lists the chemical compositions of Apollo 12,Apollo 14,Apollo 15,Apollo 16,and other classic lunar regolith simulants.However,the Apollo lunar soil data in the original Table 4 contained errors,which have been corrected in this corrigendum.展开更多
国际月球科研站ILRS (International Lunar Research Station)的建立是中国顺应当前形势的重要太空战略部署。为研究基于多源数据的形貌分析在ILRS建设过程中的应用,本研究将“ILRS计划”分为选址和科考阶段,分析ILRS选址阶段需考虑的...国际月球科研站ILRS (International Lunar Research Station)的建立是中国顺应当前形势的重要太空战略部署。为研究基于多源数据的形貌分析在ILRS建设过程中的应用,本研究将“ILRS计划”分为选址和科考阶段,分析ILRS选址阶段需考虑的约束条件,简述正射影像、月表地形、微波辐射计、多/高光谱成像、测月雷达、伽马射线等多源数据在选址阶段的应用,利用嫦娥二号DOM、DEM、LRO Diviner辐射计、LOLA激光高度计以及地质制图等多源数据对月球南极地形特征、温度条件、光照条件、对地能见度和地质特征进行分析,提出在ILRS选址阶段应考虑的诸多因素和适合着陆选址的区域特点,并以Amundsen区域为例,选择了3个候选着陆点。最后,以Shackleton、Shoemaker、de Gerlache和Amundsen撞击坑为代表,基于多源数据分析结果为ILRS科考阶段巡视路线的规划、水冰探测的分析、观测基站的设立提供参考。综上,本研究基于多源数据的形貌分析结果对ILRS的选址和完成科学考察任务具有重要参考价值。展开更多
基金Supported by the National Natural Science Foundation of China
文摘To improve our understanding of the formation and evolution of the Moon, one of the payloads onboard the Chang＇e-3 （CE-3） rover is Lunar Penetrating Radar （LPR）. This investigation is the first attempt to explore the lunar subsurface structure by using ground penetrating radar with high resolution. We have probed the subsur- face to a depth of several hundred meters using LPR. In-orbit testing, data processing and the preliminary results are presented. These observations have revealed the con- figuration of regolith where the thickness of regolith varies from about 4 m to 6 m. In addition, one layer of lunar rock, which is about 330 m deep and might have been accumulated during the depositional hiatus of mare basalts, was detected.
基金supported by the National Natural Science Foundation of China(Grant Nos.42325406 and 42304187)the China Postdoctoral Science Foundation(Grant No.2023M733476)+3 种基金the CAS Project for Young Scientists in Basic Research(Grant No.YSBR082)the National Key R&D Program of China(Grant No.2022YFF0503203)the Key Research Program of the Institute of Geology and GeophysicsChinese Academy of Sciences(Grant Nos.IGGCAS-202101 and IGGCAS-202401).
文摘The Yutu-2 rover onboard the Chang’E-4 mission performed the first lunar penetrating radar detection on the farside of the Moon.The high-frequency channel presented us with many unprecedented details of the subsurface structures within a depth of approximately 50 m.However,it was still difficult to identify finer layers from the cluttered reflections and scattering waves.We applied deconvolution to improve the vertical resolution of the radar profile by extending the limited bandwidth associated with the emissive radar pulse.To overcome the challenges arising from the mixed-phase wavelets and the problematic amplification of noise,we performed predictive deconvolution to remove the minimum-phase components from the Chang’E-4 dataset,followed by a comprehensive phase rotation to rectify phase anomalies in the radar image.Subsequently,we implemented irreversible migration filtering to mitigate the noise and diminutive clutter echoes amplified by deconvolution.The processed data showed evident enhancement of the vertical resolution with a widened bandwidth in the frequency domain and better signal clarity in the time domain,providing us with more undisputed details of subsurface structures near the Chang’E-4 landing site.
文摘The authors apologize for the erroneous transcription of the average chemical composition data of Apollo lunar soil samples in Table 4.The difference in chemical composition between lunar regolith simulants and actual lunar samples is an important indicator for evaluating their similarity.For comparison,Table 4 lists the chemical compositions of Apollo 12,Apollo 14,Apollo 15,Apollo 16,and other classic lunar regolith simulants.However,the Apollo lunar soil data in the original Table 4 contained errors,which have been corrected in this corrigendum.
文摘国际月球科研站ILRS (International Lunar Research Station)的建立是中国顺应当前形势的重要太空战略部署。为研究基于多源数据的形貌分析在ILRS建设过程中的应用,本研究将“ILRS计划”分为选址和科考阶段,分析ILRS选址阶段需考虑的约束条件,简述正射影像、月表地形、微波辐射计、多/高光谱成像、测月雷达、伽马射线等多源数据在选址阶段的应用,利用嫦娥二号DOM、DEM、LRO Diviner辐射计、LOLA激光高度计以及地质制图等多源数据对月球南极地形特征、温度条件、光照条件、对地能见度和地质特征进行分析,提出在ILRS选址阶段应考虑的诸多因素和适合着陆选址的区域特点,并以Amundsen区域为例,选择了3个候选着陆点。最后,以Shackleton、Shoemaker、de Gerlache和Amundsen撞击坑为代表,基于多源数据分析结果为ILRS科考阶段巡视路线的规划、水冰探测的分析、观测基站的设立提供参考。综上,本研究基于多源数据的形貌分析结果对ILRS的选址和完成科学考察任务具有重要参考价值。
