地磁匹配制导基准图精度评价方法及其仿真实现

A Method for Accuracy Evaluation of Reference Map in Geomagnetic Matching Guidance and Simulation

为了提高基准图与实际地磁场信息的符合程度,并为基准图误差修正提供依据,文中从分析影响基准图精度的因素入手,把基准图制备过程中可能出现的误差和影响因素逐一分析,针对各种误差和影响因素的特点提出了4种精度评价方法,以此为依据对基准图的制备方法进行了改进;最后在选定区域进行了基准图精度评价仿真实验,并对基准图误差进行了修正,仿真实验表明:修正后的基准图能够更准确、完整地描述地磁场形态。

In order to improve the agreement between reference map and geomagnetic field information, and to provide the basis for the error correction of the reference map, the factors and errors affecting accuracy of reference map in the process of preparation were analyzed, and according to the characteristics of factors and errors, four methods were proposed. Then the method for reference map was improved. In the chosen area the accuracy of reference map was evaluated and simulated, and then the errors were corrected. The result shows that the corrected reference map could depict the geomagnetic field more accurately and completely.