航空瞬变电磁TS150测量数据的校正分析

在航空电磁测量工作中发现,由于地面障碍物的存在以及气流的变化,吊舱离地的高度会发生起伏变化,同时伴随有吊舱姿态的变化,并产生干扰航电异常;据此航空瞬变电磁测量的原始数据需要进行高度校正和姿态校正,但目前引进的国外航空电磁测量系统未配有姿态测量设备。本文根据航空瞬变电磁理论分析吊舱的离地高度和姿态的变化对电磁响应影响的变化情况,通过2条测线数据的校正效果,证明高度校正和姿态校正的有效性及必要性,提出航空瞬变电磁测量系统加装吊舱姿态测量设备的建议。

Analysis of correction of the measured HTEM TS150 data

During air electric and magnetic survey height between the pod and the ground is often changed due to variation of the ground obstacles, the pod altitude resulted from the air flow and the accompanying pod attitude. The variation leads to false avionic anomaly and the measured data must be corrected. This paper analyzes influence of variation of altitude and attitude of the pot on electric and magnetic response based on the theoretic model. Together with the correction result of two survey lines we prove effectiveness and necessaries of both correction of the altitude and attitude. However the HTEM measurement system in China is not equipped with attitude system thus is put forward a suggestion that the attitude correction should be installed in the HTEM system available in China.