Survey Identifier: DSDP12GC
Format Acronym: MGD77
Data Center File Number: 15050010
Parameters Surveyed Code: 35113
File Creation Date (yyyymmdd): 19791122
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: D/V GLOMAR CHALLENGER
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): LAUGHTON A.S.,BERGREN W.A.
Project: DEEPSEA DRILL.LG 12 <NSF>
Survey Departure Date (yyyymmdd): 19700619
Port of Departure: BOSTON,MASS.
Survey Arrival Date (yyyymmdd): 19700811
Port of Arrival: LISBON,PORTUGAL
Navigation Instrumentation: SATNAV,MANUAL ENTRY GYRO AND SPD CHANGES
Geodetic Datum/Position: LINEAR INTERP.BETWEEN ADJACENT FIXES
Bathymetry Instrumentation: 12KHZ/GIFFT RECORDER/WIDE(60DEG)BEAM
Additional Forms of Bathymetric Data: ANAL.RECORDS,35MMFILM
Magnetics Instrumentation: VARIAN MFD PROTON PRECESSION MOD 4970
Additional Forms of Magnetics Data: ANAL.RECORDS,CARDS,35MMFILM
Gravity Instrumentation: NONE COLLECTED
Seismic Instrumentation: 20TO300CU.IN.AIRGUN,10-300HZ,EDO PSR REC
Formats of Seismic Data: ANAL.RECORDS,35MM MICROFILM
Topmost Latitude of Survey: +60
Bottommost Latitude: +43
Leftmost Longitude: -058
Rightmost Longitude: -007
General Digitizing Rate of Bathymetry: 050
General Sampling Rate of Bathymetry: 1SECONDSWEEP
Assumed Sound Velocity: 14630
Bathymetric Datum Code: 00
Interpolation Scheme: 5 MINUTE INTERVAL
General Digitizing Rate of Magnetics: 050
General Sampling Rate of Magnetics: 06
Reference Field Code: 03
Reference Field: IGRF 1965
Method of Applying Residual Field: LIN.INTERP.AT 30DEG C/C OR 500MI ALONG TRACK
Additional Documentation: *TIME*NAV AND RECORDS ORIGINALLY IN LOCAL TZ. DIGITIZED DATA CONVERTED TO GMT.
Number of Data Records: 4181
Min/Max Data Record:
Date: 1970 06 22
Latitude: +43.27970
Longitude: -57.77730
Magnetics Total Field, 1st Sensor: 452500
Magnetics Residual Field: -12250
Min/Max Data Record:
Date: 1970 08 09
Latitude: +59.99160
Longitude: -7.91660
Magnetics Total Field, 1st Sensor: 548650
Magnetics Residual Field: +15200