Survey Identifier: C1401
Format Acronym: MGD77
Data Center File Number: 01010090
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): JOHN CHUTE AND E. SIMPSON
Project: CRUISE 14, LEG 1
Survey Departure Date (yyyymmdd): 19710117
Port of Departure: CAPETOWN, SOUTH AFRICA
Survey Arrival Date (yyyymmdd): 19710228
Port of Arrival: PORT LOUIS, MAURITIUS
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 GSS2-31
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: -20
Bottommost Latitude: -41
Leftmost Longitude: +018
Rightmost Longitude: +060
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: 35
Reference Field Code: 03
Reference Field: IGRF-65
Method of Applying Residual Field: LINEAR INTERPOLATION BETWEEN TWO NAV PTS
General Digitizing Rate of Gravity: 35
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: 12557
Min/Max Data Record:
Date: 1971 01 17
Latitude: -40.26740
Longitude: +18.23280
Bathymetry, 2- Way Traveltime: 000500
Bathymetry, Corrected Depth: 38.0
Magnetics Total Field, 1st Sensor: 288820
Magnetics Residual Field: -08530
Free-Air Anomaly: -0685
Min/Max Data Record:
Date: 1971 02 28
Latitude: -20.18170
Longitude: +59.97670
Bathymetry, 2- Way Traveltime: 075625
Bathymetry, Corrected Depth: 5719.0
Magnetics Total Field, 1st Sensor: 400930
Magnetics Residual Field: +07430
Free-Air Anomaly: +1347