Survey Identifier: DSDP74GC
Format Acronym: MGD77
Data Center File Number: 15050073
Parameters Surveyed Code: 55133
File Creation Date (yyyymmdd): 19811007
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: D/V GLOMAR CHALLENGER
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): MOORE T.,RABINOWITZ P.
Project: DEEPSEA DRILL.LG74 <NSF>
Survey Departure Date (yyyymmdd): 19800606
Port of Departure: CAPETOWN,AFRICA
Survey Arrival Date (yyyymmdd): 19800724
Port of Arrival: WALVIS BAY,AFRICA
Navigation Instrumentation: SATNAV,MANUAL ENTRY GYRO AND SPD CHANGES
Geodetic Datum/Position: LINEAR INTERP.BETWEEN ADJACENT FIXES
Bathymetry Instrumentation: 3.5-12KHZ/EDO 550A RECORDERS/WIDE BEAM
Additional Forms of Bathymetric Data: ANAL.RECORDS,CARDS,35MMFILM
Magnetics Instrumentation: GEOMETRICS MAGNETOMETER MOD G-801/3
Additional Forms of Magnetics Data: ANAL.RECORDS,CARDS,35MMFILM
Gravity Instrumentation: NONE COLLECTED
Seismic Instrumentation: 20TO300CU.IN.AIRGUN,10-300HZ,EDO 550 REC
Formats of Seismic Data: ANAL.RECORDS,35MM MICROFILM
Topmost Latitude of Survey: -23
Bottommost Latitude: -34
Leftmost Longitude: +001
Rightmost Longitude: +018
General Digitizing Rate of Bathymetry: 050
General Sampling Rate of Bathymetry: 1SECONDSWEEP
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
Interpolation Scheme: 5 MINUTE INTERVAL
General Digitizing Rate of Magnetics: 050
General Sampling Rate of Magnetics: 06
Reference Field Code: 04
Reference Field: IGRF 1975
Method of Applying Residual Field: LIN. INTERP.POINTS WITHIN ONE DEGREE SQUARE
Number of Data Records: 6059
Min/Max Data Record:
Date: 1980 06 06
Latitude: -33.54740
Longitude: +1.73290
Bathymetry, 2- Way Traveltime: 002650
Bathymetry, Corrected Depth: 199.0
Magnetics Total Field, 1st Sensor: 277060
Magnetics Residual Field: -03640
Min/Max Data Record:
Date: 1980 07 24
Latitude: -23.46790
Longitude: +17.60950
Bathymetry, 2- Way Traveltime: 069125
Bathymetry, Corrected Depth: 5209.0
Magnetics Total Field, 1st Sensor: 304440
Magnetics Residual Field: +09730