Survey Identifier: C1211


Format Acronym: MGD77
Data Center File Number: 01010066
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19890706
Source Institution: LAMONT-DOHERTY GEOLOGICAL OBSERVATORY
Country: USA
Platform Name: ROBERT D. CONRAD
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): R. GERARD
Project: CRUISE 12, LEG 11
Survey Departure Date (yyyymmdd): 19681001
Port of Departure: HONOLULU, HAWAII
Survey Arrival Date (yyyymmdd): 196810
Port of Arrival: SUVA, FIJI
Navigation Instrumentation: SATELLITE
Geodetic Datum/Position: SATELLITE/ DEAD RECKONING
Bathymetry Instrumentation: (SEE ADD DOC / 18)
Additional Forms of Bathymetric Data: ANALOG RECORDS
Magnetics Instrumentation: L-DGO MFG PROTON-PRECESSION
Additional Forms of Magnetics Data: ANALOG RECORDS
Gravity Instrumentation: ANSCHUTZ ELECTRICTABLE, ASKANIA GSS2-6
Additional Forms of Gravity Data: ANALOG RECORDS
Seismic Instrumentation: L-DGO 25CU-IN-AIRGUN,EEL,DRUM RECORDER
Formats of Seismic Data: TWO, 2 CHANNEL SHEET RECORDS
Topmost Latitude of Survey: +21
Bottommost Latitude: -19
Leftmost Longitude: +173
Rightmost Longitude: -158
General Digitizing Rate of Bathymetry: 060
General Sampling Rate of Bathymetry: ONE SECOND
Assumed Sound Velocity: 14630
Bathymetric Datum Code: 00
Interpolation Scheme: NONE
General Digitizing Rate of Magnetics: 41
Reference Field Code: 03
Reference Field: IGRF-65
Method of Applying Residual Field: LINEAR INTERPOLATION BETWEEN TWO NAV PTS
General Digitizing Rate of Gravity: 41
Theoretical Gravity Formula Code: 2
Theoretical Gravity Formula: INTERNAT'L 1930
Reference System Code: 2
Reference System: POTSDAM SYSTEM
Additional Documentation: 06 -3.5 AND 12 KHZ, WIDE BEAM (60 DEG), 1 SECOND SWEEP
Number of Data Records: 9860

Min/Max Data Record:
Date: 1968 10 01
Latitude: -18.52000
Longitude: -179.99870
Bathymetry, 2- Way Traveltime: 000625
Bathymetry, Corrected Depth: 47.0
Magnetics Total Field, 1st Sensor: 329440
Magnetics Residual Field: -07200
Free-Air Anomaly: -2358

Min/Max Data Record:
Date: 1968 10 31
Latitude: +20.98830
Longitude: +179.99720
Bathymetry, 2- Way Traveltime: 107900
Bathymetry, Corrected Depth: 8258.0
Magnetics Total Field, 1st Sensor: 439590
Magnetics Residual Field: +07800
Free-Air Anomaly: +1781