海洋重力仪的格值校正方法研究  

Research on the Method of Correcting the Scale Values for Marine Gravimeters

作　　者：马龙 刘晨光 鄢全树 邢健 张连伟 MA Long;LIU Chenguang;YAN Quanshu;XING Jian;ZHANG Lianwei(First Institute of Oceanography,MNR,Qingdao 266061,China;School of Ocean and Earth Science,Tongji University,Shanghai 200092,China;Key Laboratory of Submarine Acoustic Investigation and Application of Qingdao,Qingdao 266061,China;East China Sea Survey Center,Ministry of Natural Resources,Shanghai 200137,China;National Marine Data and Information Service,Tianjin 300171,China)

机构地区：[1]自然资源部第一海洋研究所,山东青岛266061 [2]同济大学海洋与地球科学学院,上海200092 [3]青岛市海底声学探测技术与应用重点实验室,山东青岛266061 [4]自然资源部东海调查中心,上海200137 [5]国家海洋信息中心,天津300171

出　　处：《海洋科学进展》2025年第1期179-187,共9页Advances in Marine Science

基　　金：国家重点研发计划项目(2022YFC2808302);国家自然科学基金项目(42006198);山东省泰山学者工程项目(20230643)。

摘　　要：作为海洋地球物理调查的关键设备,海洋重力仪除受外界环境及现场操作人员水平等因素影响会引起各种系统和偶然误差外,在设备使用过程中,重力仪本身的格值往往也会发生变化。本文以重力仪往返启航/返航港且中途停靠补给港的重力数据资料为基础数学模型,建立观测重力值的误差补偿校正模型,以对观测重力值进行误差补偿,并基于补偿后的重力观测值与绝对重力值的对应关系来计算格值。在此基础上采用多次迭代的方式逐步优化并求得更新后的格值,直至相邻两次迭代所得到的格值K的差值绝对值小于允许误差为止,进而得到校正后的格值。此方法可消除由格值误差引起的系统误差,并获得高精度的航次调查成果数据,对海洋地球物理调查,尤其是大洋航次的海洋重力测量具有实际应用价值。As one of key devices in marine geophysical surveys,marine gravimeter can generate various systematic and random errors due to several factors such as external conditions and the level of on-site operators.Moreover,the scale values of the gravimeter can be also changed during the survey period.Based on the model of the gravity data collected by the gravimeter from the departure/return port and the replenishment port,an error compensation correction model is established to compensate for the observed gravity value.The scale value is calculated based on the relationship between the compensated gravity observation value and the absolute gravity value.Based on this,multiple iterations are used to obtain updated scale value until the absolute value of the difference between the scale value obtained in two adjacent iterations is less than the allowable error,thereby obtaining the corrected scale value.This method can eliminate some systematic errors caused by scale value errors and obtain high-precision ship-borne gravity data,which is of great significance for marine geophysical surveys,especially for marine gravity measurements during ocean surveys.

关 键 词：海洋重力仪 格值校正 迭代计算 系统误差校正 

分 类 号：P738.2[天文地球—海洋地质]