Application of G-880 cesium optical-pump marine magnetometer to marine engineering detection
铯光泵磁力仪(G880)在海洋工程勘探方面的应用

Along with the fast development of communications in the littoral,the engineering to lay optical cables in the sea bed is more and more frequently being done and interlaced optical cables are incidentally destroyed by artificial and natural causes or the request of ocean engineering.This demands to survey well and truly locate the position of optical cables.We used G-880 cesium optical-pump marine magnetometer to survey magnetic fields between Luchao port,big mountain and small mountain.We find that communication optical cable can arouse some magnetic anomaly from 8 nT to 20 nT,and the power cable can arouse an aomaly about(2 000 nT).Basing on the anomaly shape,we can confirm the positions of the optical cable and power cable.And according to the makeups of optical cable and power cable,we can analyze and discuss the source of magnetism anomaly.