Survey Identifier: 87000211


Format Acronym: MGD77
Data Center File Number: 67010171
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): 19870119
Survey Arrival Date (yyyymmdd): 19870208
Bathymetry Instrumentation: VERTICAL BEAM FROM GIC SEABEAM
Topmost Latitude of Survey: -22
Bottommost Latitude: -28
Leftmost Longitude: -116
Rightmost Longitude: -107
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: 29606

Min/Max Data Record:
Date: 1987 01 19
Latitude: -27.87264
Longitude: -116.01175
Bathymetry, 2- Way Traveltime: 008859
Bathymetry, Corrected Depth: 663.0
Magnetics Total Field, 1st Sensor: 322400
Magnetics Residual Field: -08430
Observed Gravity: 9786965
Free-Air Anomaly: -1112

Min/Max Data Record:
Date: 1987 02 08
Latitude: -22.22396
Longitude: -107.99263
Bathymetry, 2- Way Traveltime: 078112
Bathymetry, Corrected Depth: 5905.0
Magnetics Total Field, 1st Sensor: 352250
Magnetics Residual Field: +07070
Observed Gravity: 9792315
Free-Air Anomaly: +1235