Survey Identifier: CH115L08
Format Acronym: MGD77
Data Center File Number: 02010068
Parameters Surveyed Code: 55500
File Creation Date (yyyymmdd): 1982 530
Source Institution: WOODS HOLE OCEANOGRAPHIC INST
Country: U.S.A.
Platform Name: CHAIN
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): DR.JOHN MILLIMAN
Project: CRUISE 115, LEG 8
Funding: IDOE
Survey Departure Date (yyyymmdd): 19740601
Port of Departure: FORTALEZA, BRAZIL
Survey Arrival Date (yyyymmdd): 19740622
Port of Arrival: BRIDGETOWN,BARBADOS
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: +14
Bottommost Latitude: -04
Leftmost Longitude: -060
Rightmost Longitude: -036
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
Departure Base Station Gravity: 9780904
Departure Base Station Description: WHOI BASE STATION 864/317
Number of Data Records: 9088
Min/Max Data Record:
Date: 1974 06 01
Latitude: -3.82810
Longitude: -59.69110
Bathymetry, 2- Way Traveltime: 000100
Bathymetry, Corrected Depth: 7.0
Magnetics Total Field, 1st Sensor: 268820
Magnetics Residual Field: -04070
Observed Gravity: 9770000
Free-Air Anomaly: -1075
Min/Max Data Record:
Date: 1974 06 22
Latitude: +13.01175
Longitude: -36.73190
Bathymetry, 2- Way Traveltime: 059200
Bathymetry, Corrected Depth: 4455.0
Magnetics Total Field, 1st Sensor: 375110
Magnetics Residual Field: +05390
Observed Gravity: 9782591
Free-Air Anomaly: +1613