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KSS32-M型海洋重力仪动态性能分析
李秀敏1,2, 付永涛1, 周章国1
1.中国科学院海洋地质与环境科学重点实验室, 中国科学院海洋研究所;2.中国科学院大学
摘要:
采用测网交点差、重复测线和与KSS31-M 型海洋重力仪重合测线对比的方法, 利用近年来KSS32-M海洋重力仪的实测数据对KSS32-M海洋重力仪测量稳定性和数据可靠性进行分析。利用机动转向法验证重力仪阻尼延迟时间为70 s, 基于70 s阻尼延迟时间计算的重力测网的测量准确度为0.65 mGal, 与KSS31-M型海洋重力仪采集的重力剖面对比结果看, 重合测线相关性为高度相关, 4条重合测线网的交点差绝对值最大为1.66 mGal, 准确度为0.59 mGal, 均达到国家标准要求的近海重力测网交点差均方根小于2 mGal的技术指标。重复测线的幅值接近, 相位吻合, 匹配测点异常差的平均值小于0.9, 均方根均小于0.8, 相关性均在0.98以上。本研究表明KSS32-M型海洋重力仪动态测量性能稳定、测量数据可靠。
关键词:  海洋重力测量  KSS32-M 型海洋重力仪  阻尼延迟时间  KSS31-M 型海洋重力仪  厄特渥斯
DOI:10.11759/hykx20161117002
分类号:
基金项目:中国科学院战略性先导科技专项海洋重磁场特征(XDA1103010102)
Dynamic performance testing of the KSS32-M marine gravimeter
LI Xiu-min,FU Yong-tao,ZHOU Zhang-guo
Abstract:
Based on the data measured using the KSS32-M ocean gravimeter in recent years, the measurement stability and data reliability of this instrument are analyzed; moreover, the methods employed to measure the intersection point difference, repeating survey line, and coincidence line using the gravimeter are compared. The delay time of the gravimeter is 70 s, calculated using the maneuver steering method. Based on this calculation, the accuracy of gravimetric measurement is found to be 0.65 mGal. According to the gravity profile collected by the gravimeter, the correlations of the coincidence lines are highly correlated. The absolute value of the intersecting point difference of four coincident surveying lines is 1.66 mGal, and the precision is 0.59 mGal. All data meet the national standard of the intersection which the gravity measurement network of the national standard of the intersection point difference that less than 2 mGal. The average value of the anomalies of the matching points is less than 0.9, the variance is less than 0.8, and the correlation is higher than 0.98. In summary, this study shows that the data measured by the KSS32-M gravimeter are stable and reliable.
Key words:  marine gravimetry  KSS32-M marine gravimeter  damping delay time  KSS31-M marine gravimeter  Oetworth
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