Survey Identifier: CH115L02
Format Acronym: MGD77
Data Center File Number: 02010062
Parameters Surveyed Code: 555
File Creation Date (yyyymmdd): 19800130
Source Institution: WOODS HOLE OCEANOGRAPHIC INSTITUTION
Country: U.S.A.
Platform Name: CHAIN
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): DR. COLIN SUMMERHAYES
Project: CRUISE 115, LEG 2
Funding: ONR
Survey Departure Date (yyyymmdd): 19731214
Port of Departure: DAKAR, SENEGAL
Survey Arrival Date (yyyymmdd): 19740110
Port of Arrival: CAPETOWN, REP. OF SOUTH AFRICA
Navigation Instrumentation: SATELLITE RECEIVER, DR
Geodetic Datum/Position: SAT + 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 TAPE
Magnetics Instrumentation: VARIAN PROTON-PRECESSION MAG
Additional Forms of Magnetics Data: ANALOG RECORDS, PUNCHED TAPE
Gravity Instrumentation: ARPA VIBRATING STRING ACCELEROMETER
Additional Forms of Gravity Data: ANALOG RECORD, PUNCHED TAPE
Topmost Latitude of Survey: +15
Bottommost Latitude: -34
Leftmost Longitude: -018
Rightmost Longitude: +018
General Digitizing Rate of Bathymetry: 050
General Sampling Rate of Bathymetry: ONE/SECOND
Assumed Sound Velocity: 1463.
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 SYSTEM 1967
Reference System Code: 2
Reference System: POTSDAM SYSTEM
Corrections Applied: DRIFT=-1.28 MGAL/DAY BIAS=-25.13
Departure Base Station Gravity: 9784816
Departure Base Station Description: WHOI BASE STATION 856/317
Arrival Base Station Gravity: 9796533
Arrival Base Station Description: WHOI BASE STATION 858/317
Number of Data Records: 11392
Min/Max Data Record:
Date: 1973 12 14
Latitude: -33.34120
Longitude: -17.76730
Bathymetry, 2- Way Traveltime: 000650
Bathymetry, Corrected Depth: 49.0
Magnetics Total Field, 1st Sensor: 286980
Magnetics Residual Field: -05710
Free-Air Anomaly: -0712
Min/Max Data Record:
Date: 1974 01 09
Latitude: +14.28240
Longitude: +17.65290
Bathymetry, 2- Way Traveltime: 076150
Bathymetry, Corrected Depth: 5761.0
Magnetics Total Field, 1st Sensor: 317790
Magnetics Residual Field: +07490
Free-Air Anomaly: +1344