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Experimental Ground Penetrating Radar survey on the frozen Soyang Lake

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Experimental Ground Penetrating Radar survey on the frozen Soyang Lake
Other Titles
동결된 소양호에서의 지하투과레이다 시험탐사
Hong, Myung Ho
Lee, Ju-Han
Kim, Ki Young
Shon, Howoong
GPR; frequency; attenuation factor; conductivity; resolution; penetration depth; Fresnel zone; lacustrine sediments
Issue Date
Hong, Myung Ho, et al. 2006. "Experimental Ground Penetrating Radar survey on the frozen Soyang Lake". The Geological Society Of Korea, 42: 273-282.
To understand characteristics of Ground Penetrating Radar antenna for studying lacustrine sediments, experimental data were recorded on the frozen Soyang Lake using three antennas with center frequencies of 50, 100, and 250 MHz. For the three center frequencies, the vertical resolution of reflected signals is 0.17, 0.08, and 0.03 m at the lake bottom and 0.30, 0.15, and 0.06 m in the bottom sediments, respectively. The corresponding radii of the first Fresnel zone are computed to be 1.30, 0.91, and 0.58 m at the lake bottom. The attenuation factors and bulk conductivity for the water are obtained as 1.04, 1.17, and 1.19 dB/m and 0.049, 0.056, and 0.057 S/m, respectively. Such low conductivities indicate that the water is fresh and clean. The penetration depths into the bottom sediments are approximately 5.11 and 3.36 m for 50 and 100 MHz antennas, respectively.
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