Survey Identifier: 87000711


Format Acronym: MGD77
Data Center File Number: 67010173
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): 19870301
Survey Arrival Date (yyyymmdd): 19870323
Bathymetry Instrumentation: VERTICAL BEAM FROM GIC SEABEAM
Topmost Latitude of Survey: -13
Bottommost Latitude: -18
Leftmost Longitude: -152
Rightmost Longitude: -143
General Digitizing Rate of Bathymetry: 012
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
General Digitizing Rate of Magnetics: 013
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: 31708

Min/Max Data Record:
Date: 1987 03 01
Latitude: -17.88108
Longitude: -151.17073
Bathymetry, 2- Way Traveltime: 006147
Bathymetry, Corrected Depth: 468.0
Magnetics Total Field, 1st Sensor: 349650
Magnetics Residual Field: -07560
Observed Gravity: 9782395
Free-Air Anomaly: -1253

Min/Max Data Record:
Date: 1987 03 23
Latitude: -13.57469
Longitude: -143.08819
Bathymetry, 2- Way Traveltime: 062381
Bathymetry, Corrected Depth: 4693.0
Magnetics Total Field, 1st Sensor: 369930
Magnetics Residual Field: +06200
Observed Gravity: 9787185
Free-Air Anomaly: +2167