Survey Identifier: CH115L01


Format Acronym: MGD77
Data Center File Number: 02010061
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.ELIZABETH BUNCE
Project: CRUISE 115, LEG1
Funding: NSF
Survey Departure Date (yyyymmdd): 19731120
Port of Departure: WOODS HOLE U.S.A.
Survey Arrival Date (yyyymmdd): 19731210
Port of Arrival: DAKAR,SENEGAL
Navigation Instrumentation: SATELLITE RECEIVER, DR
Geodetic Datum/Position: SAT.AND DR MERGED WITH SHIP VELOCITY
Bathymetry Instrumentation: PRIM-3.5,SEC-12,WIDE BEEAM 1 SEC SWEEP
Additional Forms of Bathymetric Data: ANALOG RECORDS, PUNCHED TAPE
Magnetics Instrumentation: VARIAN PROTON-PRECESSION MAGNATOMETER
Additional Forms of Magnetics Data: ANALOG RECORDS, PUNCHED TAPE
Gravity Instrumentation: ARPA VIBRATING STRING ACCELEROMETER
Additional Forms of Gravity Data: ANALOG RECORDS , PUNCHED TAPES
Topmost Latitude of Survey: +41
Bottommost Latitude: +08
Leftmost Longitude: -071
Rightmost Longitude: -017
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 WHITIN 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=-1.04MGAL/DAY BIAS=-.6
Departure Base Station Gravity: 9803260
Departure Base Station Description: WHOI BASE STATION 611/317
Arrival Base Station Gravity: 9784816
Arrival Base Station Description: WHOI BASE STATION 856/317
Number of Data Records: 8908

Min/Max Data Record:
Date: 1973 11 20
Latitude: +8.95315
Longitude: -70.53020
Bathymetry, 2- Way Traveltime: 000450
Bathymetry, Corrected Depth: 34.0
Magnetics Total Field, 1st Sensor: 307390
Magnetics Residual Field: -06710
Observed Gravity: 9780000
Free-Air Anomaly: -0642

Min/Max Data Record:
Date: 1973 12 10
Latitude: +40.98424
Longitude: -17.50570
Bathymetry, 2- Way Traveltime: 079525
Bathymetry, Corrected Depth: 6044.0
Magnetics Total Field, 1st Sensor: 543810
Magnetics Residual Field: +05120
Observed Gravity: 9803438
Free-Air Anomaly: +1504