Survey Identifier: 88002611
Format Acronym: MGD77
Data Center File Number: 67010206
Parameters Surveyed Code: 55500
File Creation Date (yyyymmdd): 19930826
Source Institution: IFREMER
Country: FRANCE
Platform Name: JEAN CHARCOT
Platform Type Code: 1
Platform Type: SHIP
Funding: IFREMER
Survey Departure Date (yyyymmdd): 19880929
Survey Arrival Date (yyyymmdd): 19881022
Bathymetry Instrumentation: VERTICAL BEAM FROM GIC SEABEAM
Topmost Latitude of Survey: +49
Bottommost Latitude: +45
Leftmost Longitude: -018
Rightmost Longitude: -004
General Digitizing Rate of Bathymetry: 022
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
General Digitizing Rate of Magnetics: 023
Magnetic Sensor Tow Distance: 0200
Sensor Depth: 00100
General Digitizing Rate of Gravity: 011
Theoretical Gravity Formula Code: 4
Theoretical Gravity Formula: IAG SYSTEM 1980
Corrections Applied: DRIFT CORRECTION DONE
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: 31259
Min/Max Data Record:
Date: 1988 09 29
Latitude: +45.43088
Longitude: -17.53478
Bathymetry, 2- Way Traveltime: 003868
Bathymetry, Corrected Depth: 291.0
Magnetics Total Field, 1st Sensor: 462150
Magnetics Residual Field: -02280
Observed Gravity: 9806453
Free-Air Anomaly: -0633
Min/Max Data Record:
Date: 1988 10 22
Latitude: +48.38032
Longitude: -4.48637
Bathymetry, 2- Way Traveltime: 063964
Bathymetry, Corrected Depth: 4836.0
Magnetics Total Field, 1st Sensor: 470590
Magnetics Residual Field: +02400
Observed Gravity: 9809448
Free-Air Anomaly: +1091