Survey Identifier: A2075L04
Format Acronym: MGD77
Data Center File Number: 02020054
Parameters Surveyed Code: 55531
File Creation Date (yyyymmdd): 19800201
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. ELAZAR UCHUPI
Project: CRUISE 75, LEG 4
Funding: NSF
Survey Departure Date (yyyymmdd): 19730408
Port of Departure: MONROVIA, LIBERIA
Survey Arrival Date (yyyymmdd): 19730502
Port of Arrival: DAKAR, SENEGAL
Navigation Instrumentation: SATELLITE, DR
Geodetic Datum/Position: SAT. MERGED WITH SHIP VELOCITY
Bathymetry Instrumentation: PGR 3.5KHZ WIDE BEAM ONE SEC. SWEEP
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: SINGLE CHANNEL PRIM.-300CU.IN. GUN
Formats of Seismic Data: X-Y-Z SHEETS, MAG. TAPE
Topmost Latitude of Survey: +18
Bottommost Latitude: +01
Leftmost Longitude: -025
Rightmost Longitude: -010
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=-.45MGAL/DAY BIAS=+43.8
Departure Base Station Gravity: 9781601
Departure Base Station Description: WHOI BASE STATION 848
Arrival Base Station Gravity: 9784813
Arrival Base Station Description: WHOI BASE STATION 849
Number of Data Records: 6850
Min/Max Data Record:
Date: 1973 04 08
Latitude: +1.90840
Longitude: -24.76400
Bathymetry, 2- Way Traveltime: 000600
Bathymetry, Corrected Depth: 45.0
Magnetics Total Field, 1st Sensor: 294080
Magnetics Residual Field: -02440
Free-Air Anomaly: -0732
Min/Max Data Record:
Date: 1973 05 02
Latitude: +17.86210
Longitude: -10.00950
Bathymetry, 2- Way Traveltime: 068000
Bathymetry, Corrected Depth: 5130.0
Magnetics Total Field, 1st Sensor: 344470
Magnetics Residual Field: +04310
Free-Air Anomaly: +9127