ZL11-1A型重力仪厄特弗斯改正方法讨论

Discussion for Method of Etvos Correction of ZL11-1A Gravimeter

在对国产ZL11-1A型海洋重力仪采集的实测数据进行预处理的过程中,分别采用实测航向、航速数据和航迹拟合后重算的航向、航速数据两组数据计算厄特弗斯改正值,比较两组数据的计算结果,发现由航迹拟合后重算的航向、航速数据计算的结果效果更好,同时对实测航向、航速进行适当滤波后,再按照经典公式计算厄特弗斯改正值也可得到相当的效果,由此为相关技术人员进行ZL11-1A型海洋重力仪数据预处理工作提供一些依据。

Calculate the Etvos correction of ZL11-1A gravimeter by two different methods,one is calculated by measured speed and heading from exported data of gravimeter,the other is calculated by speed and heading recalculated from tracks fitting,the results of two methods show that recalculated result is better,but if we give suitable filter to the result of measured speed and heading,we can also get a result equal to tracks fitting method.Based on this analysis,we can provide related engineers work evidence when they process the data of ZL11-1A gravimeter.