摘要：Airborne time-domain electromagnetic (ATEM) is a geophysical method which can be used for large area exploration quickly, but it is difficult to interpret the data rapidly and accurately because of its large amount of data. The widely used methods mainly in- clude conductivity deep imaging (CDI) and one-di- mensional inversion. CDI can quickly obtain the general distribution of underground structures with-out building an initial model, but the imaging accu- racy is low. In contrast, the interpretation accuracy of one-dimensional inversion methods is relatively high, but these inversion methods require an initial model based on prior-knowledge. In this study, we propose a new coupling method of CDI and one-di- mensional inversion to obtain stable conductivity distribution of underground medium. We first gener- ate a CDI result based on a lookup table and then use it to build an initial model for one-dimensional in- version. Finally, we employ the damped eigenparam- eter inversion method to inverse the ATEM data. Ex- periments of layered models show that compared to CDI and the inversion method with the uniform half- space as the initial models, the results derived fiom our proposed coupling method are more similar to real models. At the same time, we added noises to ATEM data and tested the stability of different meth- ods, in which the coupling method is proved to be better. The proposed coupling strategy not only caneffectively improve the inversion accuracy but also has a high convergence rate, which can improve the efficiency of ATEM exploration and expand the ap- plication field of ATEM.
