Survey Identifier: A2067L04
Format Acronym: MGD77
Data Center File Number: 02020043
Parameters Surveyed Code: 55511
File Creation Date (yyyymmdd): 19811207
Source Institution: WOODS HOLE OCEANOGRAPHIC INSTITUTION
Country: U.S.A.
Platform Name: ATLANTIS II
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): DR. K. O. EMERY
Project: CRUISE 67, LEG 4
Funding: NSF
Survey Departure Date (yyyymmdd): 19720324
Port of Departure: CAPETOWN, SOUTH AFRICA
Survey Arrival Date (yyyymmdd): 19720408
Port of Arrival: WALVIS BAY, SOUTHWEST AFRICA
Navigation Instrumentation: SATELLITE, DR
Geodetic Datum/Position: SAT. MERGED WITH SHIP VELOCITY
Bathymetry Instrumentation: PGR 3.5KHZ WIDE BEAM
Additional Forms of Bathymetric Data: ANALOG RECORDS
Magnetics Instrumentation: VARIAN PROTON MAGNETOMETER
Additional Forms of Magnetics Data: ANALOG RECORDS, PUNCHED TAPE
Gravity Instrumentation: ARPA VIBRATING STRING ACCELEROMETER
Additional Forms of Gravity Data: ANALOG RECORDS, PUNCHED TAPE
Seismic Instrumentation: 300,40 CU.IN. AIR GUN, SINGLE CHANNEL
Formats of Seismic Data: ANALOG RECORDS, X-Y SHEETS
Topmost Latitude of Survey: -20
Bottommost Latitude: -34
Leftmost Longitude: +009
Rightmost Longitude: +019
General Digitizing Rate of Bathymetry: 050
General Sampling Rate of Bathymetry: ONE SECOND
Assumed Sound Velocity: 14630
Bathymetric Datum Code: 00
Interpolation Scheme: 5-MINUTES AND BREAK SLOPE
General Digitizing Rate of Magnetics: 050
General Sampling Rate of Magnetics: 60
Magnetic Sensor Tow Distance: 250
Reference Field Code: 03
Reference Field: IGRF 1965
Method of Applying Residual Field: LINEAR INTERPOLATION WITHIN DEGREE SQUARE
General Digitizing Rate of Gravity: 050
General Sampling Rate of Gravity: 60
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAG 1967
Reference System Code: 2
Reference System: POTSDAM 1930
Corrections Applied: DRIFT=+.006MGAL/DAY BIAS=+.8
Departure Base Station Gravity: 9796534
Departure Base Station Description: WHOI STATION 832
Arrival Base Station Gravity: 9788346
Arrival Base Station Description: WHOI STATION 833
Additional Documentation: =
Number of Data Records: 7470
Min/Max Data Record:
Date: 1972 03 24
Latitude: -33.80765
Longitude: +9.07700
Bathymetry, 2- Way Traveltime: 000650
Bathymetry, Corrected Depth: 49.0
Magnetics Total Field, 1st Sensor: 289510
Magnetics Residual Field: -03540
Observed Gravity: 9786965
Free-Air Anomaly: -0191
Min/Max Data Record:
Date: 1972 04 08
Latitude: -20.88493
Longitude: +18.28530
Bathymetry, 2- Way Traveltime: 065250
Bathymetry, Corrected Depth: 4911.0
Magnetics Total Field, 1st Sensor: 314170
Magnetics Residual Field: +04340
Observed Gravity: 9796610
Free-Air Anomaly: +0687