Survey Identifier: 90000411
Format Acronym: MGD77
Data Center File Number: 67010208
Parameters Surveyed Code: 55500
File Creation Date (yyyymmdd): 19930826
Source Institution: IFREMER
Country: FRANCE
Platform Name: JEAN CHARCOT
Platform Type Code: 1
Platform Type: SHIP
Funding: IFREMER
Survey Departure Date (yyyymmdd): 19900427
Survey Arrival Date (yyyymmdd): 19900525
Bathymetry Instrumentation: VERTICAL BEAM FROM GIC SEABEAM
Topmost Latitude of Survey: +38
Bottommost Latitude: +27
Leftmost Longitude: -046
Rightmost Longitude: -025
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: 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: 39775
Min/Max Data Record:
Date: 1990 04 27
Latitude: +27.93689
Longitude: -45.35654
Bathymetry, 2- Way Traveltime: 019675
Bathymetry, Corrected Depth: 1481.0
Magnetics Total Field, 1st Sensor: 406300
Magnetics Residual Field: -04610
Observed Gravity: 9791723
Free-Air Anomaly: -0175
Min/Max Data Record:
Date: 1990 05 25
Latitude: +37.73734
Longitude: -25.64622
Bathymetry, 2- Way Traveltime: 054144
Bathymetry, Corrected Depth: 4083.0
Magnetics Total Field, 1st Sensor: 431230
Magnetics Residual Field: +05860
Observed Gravity: 9801498
Free-Air Anomaly: +1805