Survey Identifier: DSDP25GC
Format Acronym: MGD77
Data Center File Number: 15050023
Parameters Surveyed Code: 55113
File Creation Date (yyyymmdd): 19791124
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: D/V GLOMAR CHALLENGER
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): SIMPSON F.S.W.,SCHLICH R.
Project: DEEPSEA DRILL.LG 25 <NSF>
Survey Departure Date (yyyymmdd): 19720628
Port of Departure: PT.LOUIS,MAURITIUS
Survey Arrival Date (yyyymmdd): 19720822
Port of Arrival: DURBAN,SOUTH AFRICA
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,CARDS,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: -02
Bottommost Latitude: -34
Leftmost Longitude: +031
Rightmost Longitude: +058
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
Number of Data Records: 7911
Min/Max Data Record:
Date: 1972 06 28
Latitude: -33.64660
Longitude: +31.77480
Bathymetry, 2- Way Traveltime: 003550
Bathymetry, Corrected Depth: 271.0
Magnetics Total Field, 1st Sensor: 300250
Magnetics Residual Field: -10000
Min/Max Data Record:
Date: 1972 08 21
Latitude: -2.37000
Longitude: +57.36110
Bathymetry, 2- Way Traveltime: 069500
Bathymetry, Corrected Depth: 5244.0
Magnetics Total Field, 1st Sensor: 359100
Magnetics Residual Field: +05450