2.5d Forward Of Time-domain Of Airborne Electromagnetic

Airborne Time Domain Electromagnetic Methods (ATEM) is most widelyused in mineral exploration, geological investigation and survey ofenvironment, based on its high efficiency, low cost, adaptability, highdistinguish ability and its unique ability of exploration in somewhere with shieldgeology floor. As to2.5d forward of time-domain of airborne electromagnetic,the underground electric parameters are two-dimensional, and the field sourceis three-dimensional, therefore the distribution of electromagnetic field isthree-dimensional. So the2.5-dimensional forward for the controlled sourceelectromagnetic is three-dimensional forward. Due to the symmetry of thesource, space domain question can be converted to wave number domain withthe use of Fourier transform. Then, we convert the result to space domain withthe use of Inverse Fourier Transform. In the end, we convert frequency domainresults to time domain results secondly use of Fourier Transform.The author completed the processing of2.5d time domain forward baseon a great number of information. At the same time, the author compiledsoftware which can form any model as you want, and with the use of thissoftware, the author formed many models, such as five-layer-model, prismmodels, topography models and models with cole-cole parameters. In the endthe author analyzed the result of the processing, and gave the answer whichtells that this method can be best used in somewhere with shield geology floor.At last, with the processing of realistic model, the author tested the usefulnessof the method again.