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物探与化探  2020, Vol. 44 Issue (6): 1408-1414    DOI: 10.11720/wtyht.2020.0113
  方法研究·信息处理·仪器研制 本期目录 | 过刊浏览 | 高级检索 |
CORS系统在航空重力测量地面GNSS基站解算中的应用
陈浩(), 张文志, 舒晴, 李健, 杨怡, 张凯淞
中国自然资源航空物探遥感中心,北京 100083
The application of the CORS system to ground GNSS base station calculation in airborne gravimetry
CHEN Hao(), ZHANG Wen-Zhi, SHU Qing, LI Jian, YANG Yi, ZHANG Kai-Song
China Aero Geophysical Survey and Remote Sensing Center for Natural Resources,Beijing 100083,China
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摘要 

航空重力测量是以飞机为载体,快速、高效获取大面积中、高频地球重力场信息的航空物探测量方法。航空重力测量技术的商业化运行归功于动态差分GNSS定位技术的成熟,使得载体的动态定位、动态测速和加速度解算精度大大提高,而差分GNSS技术解算载体动态定位的精度又依赖于地面基准站坐标精度。在实际作业中,通过组建控制网并设立地面GNSS基站,联测国家GNSS控制点,不仅需要花费较多的经济成本和时间成本,而且在人迹罕至的沼泽、高原、荒漠无人区以及远离大陆的海岛礁地区,这种方法都面临很大的困难。随着我国CORS站建设的不断深入,CORS系统精度和网度不断提高,利用CORS站数据,通过GAMIT等软件进行地面GNSS基站解算来确定其准确坐标位置的方法成为一种新趋势。本文以某测区实际数据为例,对比分析了两种方法得到的基站坐标精度及对重力测量结果的影响,介绍了CORS系统在航空重力测量地面GNSS基站解算中的应用效果,说明利用CORS系统解算不仅满足航空重力测量精度要求,而且能够提高工作效率。

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陈浩
张文志
舒晴
李健
杨怡
张凯淞
关键词 航空重力测量CORS系统GamitGNSS基站    
Abstract

Airborne gravimetry surveying is a geophysical survey method with the aircraft as a carrier. It can rapidly and efficiently extract middle and high frequency earth’s gravity field information in large areas. The commercialization of aeronautical gravity measurement technology is due to the maturity of dynamic differential GNSS positioning technology, which greatly improves the accuracy of dynamic velocity measurement and acceleration calculation of the carrier. And the accuracy of carrier dynamic positioning using the differential GNSS positioning technology depends on the accuracy of the ground reference station coordinates. In the actual work, through the establishment of GNSS control network to calculate the ground GNSS base station coordinates on the synchronization observation of national GPS geodetic control network, it not only spends much time and needs much cost but also has many difficulties in establishing the ground GNSS base station in the rare swamp, plateau, desert, unmanned areas and distant mainland’s island reef areas. With the construction of CORS station in China, the precision and the net dimension have been continuously improved. By using the data of CORS station, the method for determining the coordinates of the ground GNSS base station is employed by GAMIT, which has become a new trend. With the actual data of a survey area as an example, the authors conducted check and analysis of the base station coordinate accuracy and the measured gravity anomaly of the two methods, and readers can understand the application effect of the CORS system in the ground GNSS base station calculation in airborne gravimetry. It shows that the CORS system can not only meet the accuracy requirements of airborne gravimetry, but also improve the work efficiency.

Key wordsairborne gravimetry    CORS    Gamit    GNSS base station
收稿日期: 2020-03-10      出版日期: 2020-12-29
:  P631  
基金资助:中国地质调查局项目(121201203000169802)
作者简介: 陈浩(1986-),男,工程师,硕士研究生,从事航空物探测量与研究工作。Email:497845396@163.com
引用本文:   
陈浩, 张文志, 舒晴, 李健, 杨怡, 张凯淞. CORS系统在航空重力测量地面GNSS基站解算中的应用[J]. 物探与化探, 2020, 44(6): 1408-1414.
CHEN Hao, ZHANG Wen-Zhi, SHU Qing, LI Jian, YANG Yi, ZHANG Kai-Song. The application of the CORS system to ground GNSS base station calculation in airborne gravimetry. Geophysical and Geochemical Exploration, 2020, 44(6): 1408-1414.
链接本文:  
https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2020.0113      或      https://www.wutanyuhuatan.com/CN/Y2020/V44/I6/1408
Fig.1  地面GNSS基准站观测数据处理流程
Fig.2  基线解算控制网示意
解算参数 同步观测解算地面GNSS基准站点位精度 CORS站解算地面GNSS基准站点位精度
点号 BAS1 BAS2 BAS1 BAS2
经度(E) XXX.xx3675898 XXX.xx4313955 XXX.xx36752513 XXX.xx43132659
纬度(N) XX.xx1711920 XX.xx0444264 XX.xx17118971 XX.xx04442297
高程/m -1.758 30.746 -1.724 30.827
北向定位精度Mx/cm 0.56 0.55 0.82 1.05
东向定位精度My/cm 0.51 0.50 1.63 1.95
天向定位精度Mz/cm 1.10 1.11 0.73 0.92
Table 1  两种不同观测方法解算的地面GNSS基准站点位精度
Fig.3  CORS站解算GNSS控制网
Fig.4  水平调整后860线内符合精度计算结果
Fig.5  水平调整后8070线内符合精度计算结果
Fig.6  水平调整后8080线内符合精度计算结果
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