P023 GPR ESTIMATION FOR DIAMETER OF BURIED PIPES ANATOLY DOLGIY 1 ANDREY DOLGIY 2 VLADIMIR ZOLOTAREV 3 Summary 1 Ground Penetrating Radar (GPR) was used to estimate the diameter of buried metal pipes. The GPR acquisition system used for obtaining profiles of 7 pipes was a Radar Systems Zond-12c with shielded antenna of frequency 900 MHz. The buried pipes from 0.02 m up to 0.72 m in diameter were studied. GPR data processing was based on the method of direct least square fitting of ellipses. Average error of diameter estimation was 14% except the pipe of 0.02 m in diameter


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