Survey Identifier: 87002211
Format Acronym: MGD77
Data Center File Number: 67010179
Parameters Surveyed Code: 55500
File Creation Date (yyyymmdd): 19930409
Source Institution: IFREMER
Country: FRANCE
Platform Name: JEAN CHARCOT
Platform Type Code: 1
Platform Type: SHIP
Funding: IFREMER
Survey Departure Date (yyyymmdd): 19870718
Survey Arrival Date (yyyymmdd): 19870807
Bathymetry Instrumentation: VERTICAL BEAM FROM GIC SEABEAM
Topmost Latitude of Survey: +49
Bottommost Latitude: +08
Leftmost Longitude: -080
Rightmost Longitude: -004
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: 29527
Min/Max Data Record:
Date: 1987 07 18
Latitude: +8.98168
Longitude: -79.92468
Bathymetry, 2- Way Traveltime: 002152
Bathymetry, Corrected Depth: 161.0
Magnetics Total Field, 1st Sensor: 365310
Magnetics Residual Field: -05040
Observed Gravity: 9780857
Free-Air Anomaly: -2286
Min/Max Data Record:
Date: 1987 08 07
Latitude: +48.38261
Longitude: -4.44909
Bathymetry, 2- Way Traveltime: 070352
Bathymetry, Corrected Depth: 5330.0
Magnetics Total Field, 1st Sensor: 469500
Magnetics Residual Field: +13740
Observed Gravity: 9809494
Free-Air Anomaly: +1622