Survey Identifier: CH115L05


Format Acronym: MGD77
Data Center File Number: 02010065
Parameters Surveyed Code: 55500
File Creation Date (yyyymmdd): 19820515
Source Institution: WOODS HOLE OCEANOGRAPHIC INST
Country: U.S.A.
Platform Name: CHAIN
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): DR.FREDERICK SAYLES
Project: CRUISE 115,LEG5
Funding: ONR-NSF
Survey Departure Date (yyyymmdd): 19740323
Port of Departure: CAPETOWN,REP OF SOUTH AFRICA
Survey Arrival Date (yyyymmdd): 19740417
Port of Arrival: RIO DE JANEIRO, BRAZIL
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: 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 TAPES
Topmost Latitude of Survey: -23
Bottommost Latitude: -35
Leftmost Longitude: -043
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: IAG SYSTEM 1967
Reference System Code: 2
Reference System: POTSDAM SYSTEM
Corrections Applied: DRIFT=-1.22MGAL/DAY BIAS=-142.62
Departure Base Station Gravity: 9796532
Departure Base Station Description: WHOI BASE STSTION 859/317
Arrival Base Station Gravity: 9788064
Arrival Base Station Description: WHOI BASE STSTION 860/317
Number of Data Records: 11062

Min/Max Data Record:
Date: 1974 03 23
Latitude: -34.24974
Longitude: -42.72290
Bathymetry, 2- Way Traveltime: 001150
Bathymetry, Corrected Depth: 86.0
Magnetics Total Field, 1st Sensor: 237580
Magnetics Residual Field: -06160
Observed Gravity: 9787714
Free-Air Anomaly: -0618

Min/Max Data Record:
Date: 1974 04 17
Latitude: -23.06102
Longitude: +18.03270
Bathymetry, 2- Way Traveltime: 078250
Bathymetry, Corrected Depth: 5920.0
Magnetics Total Field, 1st Sensor: 289260
Magnetics Residual Field: +06640
Observed Gravity: 9797293
Free-Air Anomaly: +0690