Survey Identifier: CH115L04
Format Acronym: MGD77
Data Center File Number: 02010064
Parameters Surveyed Code: 555
File Creation Date (yyyymmdd): 1982 524
Source Institution: WOODS HOLE OCEANOGRAPHIC INSTITUTION
Country: U.S.A.
Platform Name: CHAIN
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): DR.HARTLEY HOSKINS
Project: CRUISE 115, LEG 4
Funding: ONR-NSF
Survey Departure Date (yyyymmdd): 19740215
Port of Departure: CAPETOWN, REP.OF SOUTH AFRICA
Survey Arrival Date (yyyymmdd): 19740315
Port of Arrival: CAPETOWN,REP.OF SOUTH AFRICA
Navigation Instrumentation: SATELLITE RECEIVER, DR
Geodetic Datum/Position: SAT. AND DR MERGED WITH SHIP VELOCITY
Bathymetry Instrumentation: PRIM-3.5,SEC-12, WIDE BEAM 1 SEC SWEEP
Additional Forms of Bathymetric Data: ANALOG RECORDS, PUNCHED TAPES
Magnetics Instrumentation: VARIAN PROTON-PRECESSION MAGNETOMETER
Additional Forms of Magnetics Data: ANALOG RECORDS, PUNCHED TAPES
Gravity Instrumentation: ARPA VIBRATING STRING ACCELEROMETER
Additional Forms of Gravity Data: ANALOG RECORDS, PUNCHED TAPE
Topmost Latitude of Survey: -34
Bottommost Latitude: -57
Leftmost Longitude: -006
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: LINER INTERPOLATION WITHIN DEGREE SQUARE
General Digitizing Rate of Gravity: 050
General Sampling Rate of Gravity: 60
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IGA SYSTEM 1967
Reference System Code: 2
Reference System: POTSDAM SYSTEM
Corrections Applied: DRIFT=-1.23MGAL/DAY BIAS=-102.93
Departure Base Station Gravity: 9796532
Departure Base Station Description: WHOI BASE STATION 858/317
Arrival Base Station Gravity: 9796532
Arrival Base Station Description: WHOI BASE STATION 859/317
Number of Data Records: 15869
Min/Max Data Record:
Date: 1974 02 15
Latitude: -56.17868
Longitude: -5.63260
Bathymetry, 2- Way Traveltime: 001200
Bathymetry, Corrected Depth: 90.0
Magnetics Total Field, 1st Sensor: 276590
Magnetics Residual Field: -17000
Observed Gravity: 9796578
Free-Air Anomaly: -0969
Min/Max Data Record:
Date: 1974 03 15
Latitude: -33.99908
Longitude: +18.18900
Bathymetry, 2- Way Traveltime: 082500
Bathymetry, Corrected Depth: 6199.0
Magnetics Total Field, 1st Sensor: 328610
Magnetics Residual Field: +12540
Observed Gravity: 9817363
Free-Air Anomaly: +1769