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On the basis of the principle of Ground
Penetrating Radar (GPR) method and geophysical characteristics, this paper
discusses in detail detection method of civil air defense distinguished by GPR
under the complex geological condition through using the analysis and
application in the survey of underground civil air defense as an example. Three
dimensional image of the defense clearly reflects its underground structure.
Test result has the greatly high detection precision. This example illustrates
the effectiveness and practicability of GPR in the respect of detection of the
civil air defense and also accumulates experiences for the application of GPR
in urban geological survey.