Survey Identifier: DSDP71GC
Format Acronym: MGD77
Data Center File Number: 15050070
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): LUDWIG W.J.,KRASHENINNIKOV V.
Project: DEEPSEA DRILL.LG 71 <NSF>
Survey Departure Date (yyyymmdd): 19800103
Port of Departure: VALPARAISO,CHILE
Survey Arrival Date (yyyymmdd): 19800220
Port of Arrival: SANTOS,BRAZIL
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: -27
Bottommost Latitude: -54
Leftmost Longitude: -077
Rightmost Longitude: -021
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: 7661
Min/Max Data Record:
Date: 1980 01 03
Latitude: -53.92700
Longitude: -76.37891
Bathymetry, 2- Way Traveltime: 000625
Bathymetry, Corrected Depth: 47.0
Magnetics Total Field, 1st Sensor: 233420
Magnetics Residual Field: -07430
Min/Max Data Record:
Date: 1980 02 20
Latitude: -27.14160
Longitude: -21.29660
Bathymetry, 2- Way Traveltime: 075575
Bathymetry, Corrected Depth: 5675.0
Magnetics Total Field, 1st Sensor: 336200
Magnetics Residual Field: +05870