Survey Identifier: 89000312
Format Acronym: MGD77
Data Center File Number: 67010202
Parameters Surveyed Code: 55500
File Creation Date (yyyymmdd): 19911018
Source Institution: IFREMER
Country: FRANCE
Platform Name: JEAN CHARCOT
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): SIBUET
Project: NORESTLANTE LEG-2
Funding: IFREMER
Survey Departure Date (yyyymmdd): 19890401
Survey Arrival Date (yyyymmdd): 19890418
Navigation Instrumentation: GPS+TRANSIT
Bathymetry Instrumentation: SEA BEAM VERTICAL BEAM
Topmost Latitude of Survey: +49
Bottommost Latitude: +37
Leftmost Longitude: -043
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: 011
Theoretical Gravity Formula Code: 8
Theoretical Gravity Formula: IAG SYS 80
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: 24070
Min/Max Data Record:
Date: 1989 04 01
Latitude: +37.67230
Longitude: -42.64792
Bathymetry, 2- Way Traveltime: 003085
Bathymetry, Corrected Depth: 232.0
Magnetics Total Field, 1st Sensor: 436730
Magnetics Residual Field: -09050
Observed Gravity: 9799373
Free-Air Anomaly: -0496
Min/Max Data Record:
Date: 1989 04 18
Latitude: +48.37950
Longitude: -4.48034
Bathymetry, 2- Way Traveltime: 068912
Bathymetry, Corrected Depth: 5213.0
Magnetics Total Field, 1st Sensor: 486390
Magnetics Residual Field: +08940
Observed Gravity: 9809548
Free-Air Anomaly: +1526