Survey Identifier: DSDP21GC
Format Acronym: MGD77
Data Center File Number: 15050019
Parameters Surveyed Code: 55113
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): ANDREWS J.,BURNS B.
Project: DEEPSEA DRILL.LG 21 <NSF>
Survey Departure Date (yyyymmdd): 19711116
Port of Departure: SUVA,FIJI
Survey Arrival Date (yyyymmdd): 19720106
Port of Arrival: DARWIN,AUSTRALIA
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: -09
Bottommost Latitude: -41
Leftmost Longitude: +145
Rightmost Longitude: -174
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: 6754
Min/Max Data Record:
Date: 1971 11 15
Latitude: -40.81330
Longitude: -179.99810
Bathymetry, 2- Way Traveltime: 000500
Bathymetry, Corrected Depth: 38.0
Magnetics Total Field, 1st Sensor: 431500
Magnetics Residual Field: -06250
Min/Max Data Record:
Date: 1972 01 06
Latitude: -9.32470
Longitude: +179.99720
Bathymetry, 2- Way Traveltime: 098800
Bathymetry, Corrected Depth: 7533.0
Magnetics Total Field, 1st Sensor: 580800
Magnetics Residual Field: +09550