Survey Identifier: 78009911


Format Acronym: MGD77
Data Center File Number: 67010071
Parameters Surveyed Code: 55000
File Creation Date (yyyymmdd): 19920312
Source Institution: IFREMER
Country: FRANCE
Platform Name: JEAN CHARCOT
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): H.D.NEEDHAM
Project: WALVIS
Funding: IFREMER
Survey Departure Date (yyyymmdd): 19781220
Port of Departure: CAPE TOWN
Survey Arrival Date (yyyymmdd): 19790113
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: -26
Bottommost Latitude: -34
Leftmost Longitude: -002
Rightmost Longitude: +018
General Digitizing Rate of Bathymetry: 018
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
General Digitizing Rate of Magnetics: 021
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: 33677

Min/Max Data Record:
Date: 1978 12 20
Latitude: -33.99138
Longitude: -1.40312
Bathymetry, 2- Way Traveltime: 013281
Bathymetry, Corrected Depth: 991.0
Magnetics Total Field, 1st Sensor: 273520
Magnetics Residual Field: -04960

Min/Max Data Record:
Date: 1979 01 13
Latitude: -26.88978
Longitude: +17.04538
Bathymetry, 2- Way Traveltime: 072151
Bathymetry, Corrected Depth: 5450.0
Magnetics Total Field, 1st Sensor: 291610
Magnetics Residual Field: +09480