Survey Identifier: BONZ02WT
Format Acronym: MGD77
Data Center File Number: 15040157
Parameters Surveyed Code: 55131
File Creation Date (yyyymmdd): 19830815
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V THOMAS WASHINGTON
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): LONSDALE P.
Project: BONANZA LEG 2 <GENERAL FUNDS>
Survey Departure Date (yyyymmdd): 19820607
Port of Departure: SAN DIEGO,CALIFORNIA
Survey Arrival Date (yyyymmdd): 19820613
Port of Arrival: SAN DIEGO,CALIFORNIA
Navigation Instrumentation: SATNAV,AUTO LOG GYRO+2D DOPPLER SPD LOG
Geodetic Datum/Position: LINEAR INTERP.BETWEEN ADJACENT FIXES
Bathymetry Instrumentation: SEABEAM VERT.BEAM(2&2/3DEG)&3.5KHZ(WIDE)
Additional Forms of Bathymetric Data: ANAL.REC,35MM FILM,DIGITAL MAG. TAPE
Magnetics Instrumentation: VARIAN MFD PROTON PRECESSION MOD 4970
Additional Forms of Magnetics Data: ANAL.RECORDS,CARDS,35MMFILM
Topmost Latitude of Survey: +33
Bottommost Latitude: +30
Leftmost Longitude: -126
Rightmost Longitude: -117
General Digitizing Rate of Bathymetry: 010
General Sampling Rate of Bathymetry: 1TO10SECONDS
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 88
Interpolation Scheme: 1 MINUTE INTERVAL
General Digitizing Rate of Magnetics: 010
General Sampling Rate of Magnetics: 06
Reference Field Code: 80
Reference Field: IGRF 1980
Method of Applying Residual Field: LIN. INTERP.POINTS WITHIN ONE DEGREE SQUARE
General Digitizing Rate of Gravity: 000
Additional Documentation: DEPTH CORRECTED FOR SHIP DRAFT (5M), REAL TIME SEABEAM SWATHS BOOKS ON MICROFILM, NGDC has multibeam bathymetric data for this cruise, however the tracklines, found here in GEODAS do not exactly correspond to the multibm data available. Bathymetry from DATE/TIME 8206071559000 to 8206071736967 are vertical beam, data extracted by NGDC from full resolution multibeam data.
Number of Data Records: 8432
Min/Max Data Record:
Date: 1982 06 07
Latitude: +30.07440
Longitude: -125.08339
Bathymetry, 2- Way Traveltime: 000840
Bathymetry, Corrected Depth: 63.0
Magnetics Total Field, 1st Sensor: 461170
Magnetics Residual Field: -04960
Min/Max Data Record:
Date: 1982 06 13
Latitude: +32.61580
Longitude: -117.28601
Bathymetry, 2- Way Traveltime: 059250
Bathymetry, Corrected Depth: 4439.0
Magnetics Total Field, 1st Sensor: 487080
Magnetics Residual Field: +05570