Survey Identifier: 79000211


Format Acronym: MGD77
Data Center File Number: 67010072
Parameters Surveyed Code: 55000
File Creation Date (yyyymmdd): 19911118
Source Institution: IFREMER
Country: FRANCE
Platform Name: JEAN CHARCOT
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): H.D.NEEDHAM
Project: WALVIS 2 - CH85
Funding: IFREMER
Survey Departure Date (yyyymmdd): 19790125
Port of Departure: CAPE TOWN
Survey Arrival Date (yyyymmdd): 19790220
Port of Arrival: CAPE TOWN
Navigation Instrumentation: SAT I.T.T.
Geodetic Datum/Position: DEAD RECKONING BASED ON SAT FIXES
Bathymetry Instrumentation: SEA-BEAM VERTICAL BEAM
Additional Forms of Bathymetric Data: ANALOG RECORDS
Magnetics Instrumentation: PROTON PRECESSION MAG
Additional Forms of Magnetics Data: ANALOG RECORDS
Topmost Latitude of Survey: -24
Bottommost Latitude: -39
Leftmost Longitude: -015
Rightmost Longitude: +018
General Digitizing Rate of Bathymetry: 011
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
General Digitizing Rate of Magnetics: 010
Magnetic Sensor Tow Distance: 0200
Sensor Depth: 00100
Additional Documentation: OBSERVED PARAMETERS : POSITION LINEARLY INTERPOLATED IN FUNCTION OF TIME, SYNCHRONIZED PARAMETERS : VALUES INTERPOLATED LINEARLY IN FUNCTION OF TIME, EOTVOS CORRECTION : CAP + SPEED DETERMINED LINEARLY FROM THE NAVIGATION POINTS, DGRF : HARMONIC COEFFICIENTS COMPUTED ONCE (LINEARLY) AT THE DATE OF THE FIRST, OBSERVED DATA FOR EACH CRUISE, ECHO SOUNDING CORRECTION TABLES - 3RD ED. D.J.T. CARTER, NP 139 HYFROGRAPHIC DEPARTMENT - MINISTRY OF DEFENSE - UK 1980
Number of Data Records: 33771

Min/Max Data Record:
Date: 1979 01 25
Latitude: -38.43809
Longitude: -14.64430
Bathymetry, 2- Way Traveltime: 005700
Bathymetry, Corrected Depth: 429.0
Magnetics Total Field, 1st Sensor: 264470
Magnetics Residual Field: -07480

Min/Max Data Record:
Date: 1979 02 20
Latitude: -24.87500
Longitude: +17.87230
Bathymetry, 2- Way Traveltime: 070827
Bathymetry, Corrected Depth: 5340.0
Magnetics Total Field, 1st Sensor: 297560
Magnetics Residual Field: +09940