| 双地下物质变化区参数解算方法研究 |
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| 引用本文： | 董冬辉,程向明,张桢君,王建成,冒蔚.双地下物质变化区参数解算方法研究[J].天文学报,2022,63(3):33-97. |
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| 作者姓名： | 董冬辉 程向明 张桢君 王建成 冒蔚 |
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| 作者单位： | 1. 中国科学院云南天文台;2. 中国科学院大学;3. 中国科学院天体结构与演化重点实验室;4. 云南省应用天文技术工程实验室;5. 安阳工学院计算机科学与信息工程学院 |
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| 摘 要： | 经典天体测量仪器以铅垂线为基准测量本地的天文经纬度,因而能探测到本地铅垂线的偏转.本地铅垂线的偏转代表着测站周围重力场的变化,而这一变化与地下物质的再分布相关,由此有望帮助了解地下物质变化的情况.将本地的铅垂线偏转(Plumb Line Variation, PLV)与地下物质变化联系起来,建立了双质量体模型.在97°E–107°E和21°N–29°N范围内,考虑了3480个包含正、负质量变化(相对地质背景)的质量体组合算例,并利用差分进化(Differential Evolutionary, DE)算法进行了解算.解算得到的质量体相对于模拟值的位置误差小于米量级,质量误差小于1011kg,结果精度较高.
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| 关 键 词： | 天体测量学 方法:数值:差分进化算法 铅垂线偏转 地下质量扰动 |
Research on the Calculation Method for the Parameters of Underground Dual-Mass Disturbance Zones |
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| DONG Dong-hui,CHENG Xiang-ming,ZHANG Zhen-jun,WANG Jian-cheng,MAO Wei.Research on the Calculation Method for the Parameters of Underground Dual-Mass Disturbance Zones[J].Acta Astronomica Sinica,2022,63(3):33-97. |
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| Authors: | DONG Dong-hui CHENG Xiang-ming ZHANG Zhen-jun WANG Jian-cheng MAO Wei |
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| Institution: | Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216;University of Chinese Academy of Sciences, Beijing 100049;Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216;University of Chinese Academy of Sciences, Beijing 100049;Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216;Engineering Laboratory on Applied Astronomical Technology of Yunnan, Kunming 650216;School of Computer Science & Information Engineering, Anyang Institute of Technology, Anyang 455000 |
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| Abstract: | The classic astrometric instruments can measure the local astronomical longitude and latitude by using plumb line as a reference, where the variation of local plumb line can be gotten. The deflection of the local plumb line implies the change of the gravitational field around the station. It is often related to the redistribution of subsurface matter, and could be helpful for knowing the situation of underground materials. A dual-mass model is developed to find the relationship between local PLV (Plumb Line Variation) and subsurface mass change. 3480 sets of cases are considered which containing positive and negative mass variations (relative to the geological background) in the range of 97oE--107oE (E denotes east longitude) and 21oN--29oN (N denotes north latitude). The relevant problem is solved by the DE (Differential Evolutionary) algorithm. The resulting error of position is about 1 meter and error of mass is less than 1011kg, which are improved in comparison to the previous treatments. |
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| Keywords: | astrometry methods: numerical: DE (Differential Evolutionary) algorithm PLV (Plumb Line Variation) underground mass disturbance |
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