Survey Identifier: 87004711
Format Acronym: MGD77
Data Center File Number: 67010181
Parameters Surveyed Code: 55500
File Creation Date (yyyymmdd): 19910702
Source Institution: IFREMER
Country: FRANCE
Platform Name: JEAN CHARCOT
Platform Type Code: 1
Platform Type: SHIP
Funding: IFREMER
Survey Departure Date (yyyymmdd): 19871117
Survey Arrival Date (yyyymmdd): 19871205
Bathymetry Instrumentation: SEABEAM VERTICAL BEAM
Topmost Latitude of Survey: +21
Bottommost Latitude: +15
Leftmost Longitude: -080
Rightmost Longitude: -061
General Digitizing Rate of Bathymetry: 010
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
General Digitizing Rate of Magnetics: 010
Magnetic Sensor Tow Distance: 0200
Sensor Depth: 00100
General Digitizing Rate of Gravity: 010
Theoretical Gravity Formula Code: 8
Theoretical Gravity Formula: IAG SYS
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: 26094
Min/Max Data Record:
Date: 1987 11 17
Latitude: +15.92662
Longitude: -79.99970
Bathymetry, 2- Way Traveltime: 005211
Bathymetry, Corrected Depth: 398.0
Magnetics Total Field, 1st Sensor: 382180
Magnetics Residual Field: -04110
Observed Gravity: 9782468
Free-Air Anomaly: -3510
Min/Max Data Record:
Date: 1987 12 05
Latitude: +20.49737
Longitude: -61.52343
Bathymetry, 2- Way Traveltime: 107053
Bathymetry, Corrected Depth: 8220.0
Magnetics Total Field, 1st Sensor: 436550
Magnetics Residual Field: +06320
Observed Gravity: 9788111
Free-Air Anomaly: +1748