GPR can provide valuable information on subsurface features within a golf course green. Getting the most out of a golf course green GPR study requires careful consideration of computer-processing procedures and the field survey setup. Analysis of 1000 MHz center antenna frequency GPR data from a USGA Method green indicate some useful guidelines on GPR computer-processing procedures and the field survey setup:
1. A computer-processing sequence of a signal saturation correction filter (SSCF) and a constant gain function (CGF) is the best alternative for the purpose of producing a GPR profile showing golf course green constructed soil layer thickness and depth and individual drainage pipe positions.
2. A computer-processing sequence of a SSCF, a spatial background subtraction filter (SBSF), 2-D migration (2DM), and signal trace enveloping (STE) is the best choice for GPR time-slice amplitude mapping of a golf course green subsurface drainage pipe system.
3. With regard to field survey setup, a bidirectional GPR survey (two sets of parallel measurement transect oriented perpendicular to one another) with a spacing distance between adjacent lines of measurement no larger than 1 m is the proper approach for complete mapping of a golf course green subsurface drainage system.
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