Survey Identifier: DSDP81GC


Format Acronym: MGD77
Data Center File Number: 15050081
Parameters Surveyed Code: 55155
File Creation Date (yyyymmdd): 19820921
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: D/V GLOMAR CHALLENGER
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): ROBERTS D.G.,SCHNITKER D.
Project: DEEPSEA DRILL.LG81 <NSF>
Survey Departure Date (yyyymmdd): 19810729
Port of Departure: SOUTHAMPTON,ENGLAND
Survey Arrival Date (yyyymmdd): 19810915
Port of Arrival: PUNTA DELGADO,AZORES
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
Seismic Instrumentation: 20TO300CU.IN.AIRGUN,10-300HZ,EDO 550 REC
Formats of Seismic Data: ANAL.RECORDS,35MM MICROFILM
Topmost Latitude of Survey: +57
Bottommost Latitude: +39
Leftmost Longitude: -026
Rightmost Longitude: -011
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: 2465

Min/Max Data Record:
Date: 1981 07 29
Latitude: +39.09540
Longitude: -25.88491
Bathymetry, 2- Way Traveltime: 002500
Bathymetry, Corrected Depth: 188.0
Magnetics Total Field, 1st Sensor: 444580
Magnetics Residual Field: -08360

Min/Max Data Record:
Date: 1981 09 15
Latitude: +56.61580
Longitude: -11.18869
Bathymetry, 2- Way Traveltime: 059200
Bathymetry, Corrected Depth: 4457.0
Magnetics Total Field, 1st Sensor: 508210
Magnetics Residual Field: +10180