Survey Identifier: 87004712


Format Acronym: MGD77
Data Center File Number: 67010182
Parameters Surveyed Code: 55500
File Creation Date (yyyymmdd): 19910701
Source Institution: IFREMER
Country: FRANCE
Platform Name: JEAN CHARCOT
Platform Type Code: 1
Platform Type: SHIP
Funding: IFREMER
Survey Departure Date (yyyymmdd): 19871210
Survey Arrival Date (yyyymmdd): 19871222
Bathymetry Instrumentation: SEABEAM VERTICAL BEAM
Topmost Latitude of Survey: +21
Bottommost Latitude: +14
Leftmost Longitude: -079
Rightmost Longitude: -061
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: 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: 17409

Min/Max Data Record:
Date: 1987 12 10
Latitude: +14.58449
Longitude: -78.17548
Bathymetry, 2- Way Traveltime: 004299
Bathymetry, Corrected Depth: 325.0
Magnetics Total Field, 1st Sensor: 372320
Magnetics Residual Field: -04130
Observed Gravity: 9783034
Free-Air Anomaly: -2903

Min/Max Data Record:
Date: 1987 12 22
Latitude: +20.50239
Longitude: -61.06045
Bathymetry, 2- Way Traveltime: 089816
Bathymetry, Corrected Depth: 6848.0
Magnetics Total Field, 1st Sensor: 439130
Magnetics Residual Field: +09810
Observed Gravity: 9787975
Free-Air Anomaly: +1615