Survey Identifier: CH115L03
Format Acronym: MGD77
Data Center File Number: 02010063
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. CARL BOWIN
Project: CRUISE 115, LEG 3
Funding: ONR
Survey Departure Date (yyyymmdd): 19740114
Port of Departure: CAPETOWN, REP. OF SOUTH AFRICA
Survey Arrival Date (yyyymmdd): 19740211
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: -33
Bottommost Latitude: -57
Leftmost Longitude: -002
Rightmost Longitude: +019
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=-1.23 MGAL/DAY BIAS=-65.07
Departure Base Station Gravity: 9796533
Departure Base Station Description: WHOI BASE STATION 8581317
Arrival Base Station Gravity: 9796532
Arrival Base Station Description: WHOI BASE STATION 858/317
Number of Data Records: 15437
Min/Max Data Record:
Date: 1974 01 14
Latitude: -56.70970
Longitude: -1.15120
Bathymetry, 2- Way Traveltime: 000325
Bathymetry, Corrected Depth: 24.0
Magnetics Total Field, 1st Sensor: 280310
Magnetics Residual Field: -13620
Free-Air Anomaly: -0956
Min/Max Data Record:
Date: 1974 02 11
Latitude: -33.87760
Longitude: +18.42880
Bathymetry, 2- Way Traveltime: 142505
Bathymetry, Corrected Depth: 10687.9
Magnetics Total Field, 1st Sensor: 336590
Magnetics Residual Field: +20450
Free-Air Anomaly: +1660