Journal of Glaciology
International Glaciological Society
Earth Sciences | Glaciology
High-resolution maps of the glacier bed are developed through a pseudo-three-dimensional migration of a dense array of radio-echo sounding profiles. Resolution of three-dimensional maps of sub-glacial surfaces is determined by the radio-echo sounding wavelength, data spacing in the field, and migration. Based on synthetic radio-echo sounding profile experiments, the maximum resolution of the final map cannot exceed one half-wavelength. A methodology of field and processing techniques is outlined to develop a maximum-resolution map of the glacier bed. The field and processing techniques valley glacier in south-central Alaska. The field techniques and the processing steps used on the glacier result in a map of 20 m x 20 m resolution.
© International Glaciological Society
Welch, Brian C.; Pfeffer, W. Tad; Harper, Joel T.; and Humphrey, Neil F., "Mapping subglacial surfaces of temperate valley glaciers by two-pass migration of a radio-echo sounding survey" (1998). Geosciences Faculty Publications. 23.