Survey Identifier: DSDP68GC
Format Acronym: MGD77
Data Center File Number: 15050067
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): CANN J.R.,WHITE S.M.
Project: DEEPSEA DRILL.LG 68 <NSF>
Survey Departure Date (yyyymmdd): 19790705
Port of Departure: PUNTARENAS,COSTA RICA
Survey Arrival Date (yyyymmdd): 19790918
Port of Arrival: LA LIBERTAD,EQUADOR
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: +13
Bottommost Latitude: -03
Leftmost Longitude: -096
Rightmost Longitude: -071
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: 14074
Min/Max Data Record:
Date: 1979 07 05
Latitude: -2.12360
Longitude: -95.63661
Bathymetry, 2- Way Traveltime: 001525
Bathymetry, Corrected Depth: 114.0
Magnetics Total Field, 1st Sensor: 309560
Magnetics Residual Field: -08960
Min/Max Data Record:
Date: 1979 09 18
Latitude: +12.71659
Longitude: -71.11659
Bathymetry, 2- Way Traveltime: 055675
Bathymetry, Corrected Depth: 4175.0
Magnetics Total Field, 1st Sensor: 387480
Magnetics Residual Field: +06800