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Field Tests of the DOLPHIN/EM-100 Over Norfolk Canyon
NAVAL RESEARCH LAB STENNIS SPACE CENTER MS
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The Deep Ocean Logging Platform with Hydrographic Instrumentation and Navigation DOLPHIN, developed for the Canadian Hydrographic Service CHS, was field tested in the United States by the Naval Research Laboratory, Stennis. Tests were conducted in conjunction with the National Oceanic and Atmospheric Administration NOAA-National Ocean Service and the CHS. Patch tests were conducted to evaluate roll, pitch, heave, and navigation errors, and survey lines were run over the Norfolk Canyon to evaluate bathymetry. Multibeam data were collected simultaneously by the NOAA ship WHITING and later by the US Navy ship LITTLEHALES. The DOLPHIN and LITTLEHALES are both equipped with the Simrad EM-100 95 kHz and the WHITING is equipped with the Seabeam HYDROCHART II 36 kHz. All three systems used differential GPS for positioning. The data sets were processed and evaluated and results of the evaluation of the DOLPHIN system are given for attitude, navigation, rms errors, bathymetry and handling. Recommendations are given for improving hydrographic data collection using the DOLPHIN.
APPROVED FOR PUBLIC RELEASE