United States Geological Survey, Menlo Park, California. Chief Scientists: Dave Falvey, Gary Greene. Geological and Geophysical data (3dot5khz, 12khz, gravity, uniboom, sonobuoy, 24channel, airgun, gravitycore, chaindredge, courserecorder, integratednavigation, LoranC, transitsatellite, airgunmonitor) of field activity L-6-82-SP in Vanuatu from 04/27/1982 to 05/16/1982
Location
Vanuatu
Summary
Approximately 2400 km of 24-fold multichannel seismic reflection data were collected along 40 lines. The seismic source consisted of a tuned, 5 airgun array totaling 1311 cubic inches, pressurized to 2000 psi, towed at a depth of approximately 10.5 meters. Individual gun volumes were usually 148, 194, 194, 309, and 466 cubic inches. The receiver consisted of a 24 channel hydrophone in each group. The near channel offset from the airguns was 297 m and far channel offset 2611 m. The data were recorded with a GUS model HDDR-4200 recording system. Shots were fired every 50 meters and records were sampled in the field at a 2 millisecond rate but resampled to a 4 millisecond rate prior to processing. Primary navigation was by satellite. 2375 nautical miles of bathymetry data, 2216 nautical miles of magnetic data, and 2302 nautical miles of gravity data.
GIS tools on best navigation file, l-6-82-sp.083, found cumulative trackline distance to the nearest tens of kilometers is 4450 kilometers.
Staff information imported from InfoBank
Aaron Dunwald - Chief Engineer
Carol Hirozawa - Navigator
Dan Hurlbert - Mechanical Technician
Dave Falvey - Chief Scientist
David Johnson - Geologist
Dave Melendrez - Chief Mate
Donna Blackman - Navigator
Gary Greene - Chief Scientist
Greg Lewis - Watchstander
Greg Smith - Watchstander
Guy Cochrane - Watchstander
Jaque Daniel - Geophysicist
Jon Erickson - Mechanical Technician
Kaye Kinoshita - Navigator
Mark Holmes - Oceanographer
Mike Fisher - Geophysicist
Rick Viall - Electronics Technician
Roy Fields - Electronics Technician
Rudy Katz - Geophysicist
Sandy McFarlane - Geophysicist
Vern Pilgrim - Ship Captain
Platform
Samuel Phillips Lee
USNS S. P. Lee (T-AGS-31), Length 208 feet, Beam 39 feet, Draft 14 feet, Speed 12 knots
Gravity, Magnetics, Navigation, Geology, Air Gun / Water Gun, Boomer, Multichannel, Sonobuoy, Sub Bottom Profiler, Single Beam
Documents: Notes and log books
Name
Description
GEOLOGY_OF_VANUATU-SP_154485
Maps of Vanuatu geology from MicroMEDIA scans. Not associated with USGS field activity, but possibly used in support of L682SP. Published by British Government's Ministry of Overseas Development, 1974.
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