Survey Identifier: BT8303
Format Acronym: MGD77
Data Center File Number: 05010014
Parameters Surveyed Code: 55513
File Creation Date (yyyymmdd): 19850130
Source Institution: GEOPHYSICS DIVISION, DSIR, NEW ZEALAND
Country: NEW ZEALAND
Platform Name: GRV TANGAROA
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): B. W. DAVY
Project: BOUNTY TROUGH 3
Funding: NZ GOVERNMENT
Survey Departure Date (yyyymmdd): 19830922
Port of Departure: WELLINGTON, NEW ZEALAND
Survey Arrival Date (yyyymmdd): 19831007
Port of Arrival: WELLINGTON, NEW ZEALAND
Navigation Instrumentation: SATELLITE
Geodetic Datum/Position: SATELLITE AND DEAD RECKONING
Bathymetry Instrumentation: 12 KHZ FREQUENCY
Magnetics Instrumentation: PROTON PRECESSION, GEOMETRICS
Gravity Instrumentation: LACOSTE AND ROMBERG S-80
Seismic Instrumentation: SINGLE CHANNEL
Formats of Seismic Data: MICROFILM AND ANALOG
Topmost Latitude of Survey: -41
Bottommost Latitude: -48
Leftmost Longitude: +173
Rightmost Longitude: -174
General Digitizing Rate of Bathymetry: 010
General Sampling Rate of Bathymetry: 1/SECOND
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
Interpolation Scheme: 10-MINUTE INTERVALS AND PEAKS AND TROUGHS
General Digitizing Rate of Magnetics: 010
Reference Field Code: 88
Reference Field: IGRF-80
Method of Applying Residual Field: LINEAR INTERPOLATION BETWEEN NAVIGATION POINTS
General Digitizing Rate of Gravity: 010
General Sampling Rate of Gravity: 00
Theoretical Gravity Formula Code: 2
Theoretical Gravity Formula: INTERNAT. 1930
Reference System: NZ POTSDAM 1959
Corrections Applied: CROSS COUPLING ONLY
Departure Base Station Gravity: 9802903
Departure Base Station Description: WELLINGTON, NEW ZEALAND
Arrival Base Station Gravity: 9802902
Arrival Base Station Description: WELLINGTON, NEW ZEALAND
Additional Documentation: DATA RECORD IN NEW ZEALAND STANDARD TIME, BATHYMETRY CORRECTED FOR DRAUGHT AND WATER DENSTIY
Number of Data Records: 19490
Min/Max Data Record:
Date: 1983 09 22
Latitude: -47.02330
Longitude: -179.99970
Bathymetry, Corrected Depth: 253.0
Magnetics Total Field, 1st Sensor: 564540
Magnetics Residual Field: -03020
Free-Air Anomaly: -0898
Min/Max Data Record:
Date: 1983 10 06
Latitude: -41.90990
Longitude: +180.00000
Bathymetry, Corrected Depth: 4727.0
Magnetics Total Field, 1st Sensor: 603900
Magnetics Residual Field: +11960
Free-Air Anomaly: +0755