Survey Identifier: 77005112
Format Acronym: MGD77
Data Center File Number: 67010069
Parameters Surveyed Code: 55111
File Creation Date (yyyymmdd): 19830928
Source Institution: CNEXO
Country: FRANCE
Platform Name: JEAN CHARCOT
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): H.D. NEEDHAM
Project: VEMA - CH78
Funding: CNEXO
Survey Departure Date (yyyymmdd): 19771011
Port of Departure: FORT-DE-FRANCE
Survey Arrival Date (yyyymmdd): 19771104
Port of Arrival: FORT-DE-FRANCE
Navigation Instrumentation: SAT I.T.T.
Geodetic Datum/Position: DEAD RECKONING BASED ON SAT FIXES
Bathymetry Instrumentation: SEA-BEAM
Additional Forms of Bathymetric Data: ANALOG RECORDS
Magnetics Instrumentation: PROTON PRECESSION MAG
Additional Forms of Magnetics Data: ANALOG RECORDS
Topmost Latitude of Survey: +15
Bottommost Latitude: +10
Leftmost Longitude: -061
Rightmost Longitude: -039
General Digitizing Rate of Bathymetry: 11
General Sampling Rate of Bathymetry: 4 SECONDS
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
Interpolation Scheme: LINEAR INTERPOLATION
General Digitizing Rate of Magnetics: 12
General Sampling Rate of Magnetics: 10
Magnetic Sensor Tow Distance: 200
Sensor Depth: 00100
Reference Field Code: 04
Reference Field: IGRF-75
Method of Applying Residual Field: INTERPOLATION BETWEEN NAVIGATION DATA
Theoretical Gravity Formula Code: 2
Theoretical Gravity Formula: INTERNATIONAL 30
Number of Data Records: 30403
Min/Max Data Record:
Date: 1977 10 11
Latitude: +10.34290
Longitude: -60.75620
Bathymetry, Corrected Depth: 933.0
Magnetics Total Field, 1st Sensor: 322450
Magnetics Residual Field: -00846
Min/Max Data Record:
Date: 1977 11 04
Latitude: +14.40470
Longitude: -39.93440
Bathymetry, Corrected Depth: 6831.0
Magnetics Total Field, 1st Sensor: 407720
Magnetics Residual Field: +06448