Survey Identifier: 87002111
Format Acronym: MGD77
Data Center File Number: 67010178
Parameters Surveyed Code: 55500
File Creation Date (yyyymmdd): 19930408
Source Institution: IFREMER
Country: FRANCE
Platform Name: JEAN CHARCOT
Platform Type Code: 1
Platform Type: SHIP
Funding: IFREMER
Survey Departure Date (yyyymmdd): 19870618
Survey Arrival Date (yyyymmdd): 19870716
Bathymetry Instrumentation: VERTICAL BEAM FROM GIC SEABEAM
Topmost Latitude of Survey: +22
Bottommost Latitude: +06
Leftmost Longitude: -108
Rightmost Longitude: -079
General Digitizing Rate of Bathymetry: 011
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
General Digitizing Rate of Magnetics: 011
Magnetic Sensor Tow Distance: 0200
Sensor Depth: 00100
General Digitizing Rate of Gravity: 010
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: 40125
Min/Max Data Record:
Date: 1987 06 18
Latitude: +6.34623
Longitude: -107.77453
Bathymetry, 2- Way Traveltime: 003152
Bathymetry, Corrected Depth: 238.0
Magnetics Total Field, 1st Sensor: 347770
Magnetics Residual Field: -06290
Observed Gravity: 9780017
Free-Air Anomaly: -2269
Min/Max Data Record:
Date: 1987 07 16
Latitude: +21.29478
Longitude: -79.41619
Bathymetry, 2- Way Traveltime: 085141
Bathymetry, Corrected Depth: 6456.0
Magnetics Total Field, 1st Sensor: 432180
Magnetics Residual Field: +04500
Observed Gravity: 9786583
Free-Air Anomaly: +0827