Survey Identifier: 87000311
Format Acronym: MGD77
Data Center File Number: 67010172
Parameters Surveyed Code: 55500
File Creation Date (yyyymmdd): 19930406
Source Institution: IFREMER
Country: FRANCE
Platform Name: JEAN CHARCOT
Platform Type Code: 1
Platform Type: SHIP
Funding: IFREMER
Survey Departure Date (yyyymmdd): 19870208
Survey Arrival Date (yyyymmdd): 19870223
Bathymetry Instrumentation: VERTICAL BEAM FROM GIC SEABEAM
Topmost Latitude of Survey: -17
Bottommost Latitude: -28
Leftmost Longitude: -150
Rightmost Longitude: -109
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: 21300
Min/Max Data Record:
Date: 1987 02 08
Latitude: -27.74535
Longitude: -149.59584
Bathymetry, 2- Way Traveltime: 004973
Bathymetry, Corrected Depth: 380.0
Magnetics Total Field, 1st Sensor: 325870
Magnetics Residual Field: -12390
Observed Gravity: 9784567
Free-Air Anomaly: -0867
Min/Max Data Record:
Date: 1987 02 23
Latitude: -17.45942
Longitude: -109.43997
Bathymetry, 2- Way Traveltime: 062320
Bathymetry, Corrected Depth: 4687.0
Magnetics Total Field, 1st Sensor: 382760
Magnetics Residual Field: +13490
Observed Gravity: 9792250
Free-Air Anomaly: +1837