Survey Identifier: L176MX


Format Acronym: MGD77
Data Center File Number: 06050056
Parameters Surveyed Code: 50000
File Creation Date (yyyymmdd): 19870415
Source Institution: USGS Branch of Pacific Marine Geology
Country: United States
Platform Name: Lee
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): JIM BISCHOFF,BILL NORMARK,J.HEIN
Survey Departure Date (yyyymmdd): 19760106
Port of Departure: LV E DK PRUDHOE BAY
Survey Arrival Date (yyyymmdd): 19760217
Port of Arrival: LA PAZ, MEXICO
Navigation Instrumentation: SATNAV,LORAN-A,DOPPLER SONAR
Geodetic Datum/Position: PRIM-SATNAV, SEC-LORAN-A
Bathymetry Instrumentation: 3.5 KHZ WIDE 1 SEC
Additional Forms of Bathymetric Data: RECORDER ROLLS
Magnetics Instrumentation: PROTON PRECESSION MAG-GEOMETRICS G-801
Additional Forms of Magnetics Data: ANALOG RECORDS
Seismic Instrumentation: MINISPARKER,UNIBOOM,SINGLE CHANNEL ARCER
Formats of Seismic Data: RECORDER ROLLS
Topmost Latitude of Survey: +38
Bottommost Latitude: +20
Leftmost Longitude: -123
Rightmost Longitude: -106
General Digitizing Rate of Bathymetry: 402
General Sampling Rate of Bathymetry: 20/SECONDS
Assumed Sound Velocity: 14630
General Sampling Rate of Magnetics: 04
Magnetic Sensor Tow Distance: 213
Reference Field Code: 04
Reference Field: IGRF-75
Method of Applying Residual Field: LINEAR INTERP. BETWEEN NAV POINTS
Number of Data Records: 1688

Min/Max Data Record:
Date: 1976 01 06
Latitude: +20.86066
Longitude: -122.60517
Bathymetry, 2- Way Traveltime: 000420
Bathymetry, Corrected Depth: 31.0

Min/Max Data Record:
Date: 1976 02 17
Latitude: +37.34483
Longitude: -106.42083
Bathymetry, 2- Way Traveltime: 050410
Bathymetry, Corrected Depth: 3774.0