Survey Identifier: BT8203
Format Acronym: MGD77
Data Center File Number: 05010012
Parameters Surveyed Code: 55513
File Creation Date (yyyymmdd): 19840416
Source Institution: GEOPHYSICS DIVISION, DSIR, NEW ZEALAND
Country: NEW ZEALAND
Platform Name: GRV TANGAROA
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): F. J. DAVEY
Project: BOUNTY TROUGH 2
Funding: NZ GOVERNMENT
Survey Departure Date (yyyymmdd): 19821027
Port of Departure: WELLINGTON, NEW ZEALAND
Survey Arrival Date (yyyymmdd): 19821112
Port of Arrival: WELLINGTON, NEW ZEALAND
Navigation Instrumentation: SATELLITE
Geodetic Datum/Position: 05
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: -40
Bottommost Latitude: -48
Leftmost Longitude: +174
Rightmost Longitude: -172
General Digitizing Rate of Bathymetry: 100
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: 9802891
Departure Base Station Description: WELLINGTON, NEW ZEALAND
Additional Documentation: DATA RECORDED IN NEW ZEALAND STATNDARD TIME
Number of Data Records: 21486
Min/Max Data Record:
Date: 1982 10 27
Latitude: -47.52000
Longitude: -179.99910
Bathymetry, Corrected Depth: 39.0
Magnetics Total Field, 1st Sensor: 547400
Magnetics Residual Field: -06200
Free-Air Anomaly: -0973
Min/Max Data Record:
Date: 1982 11 12
Latitude: -40.65990
Longitude: +179.99990
Bathymetry, Corrected Depth: 5159.0
Magnetics Total Field, 1st Sensor: 589440
Magnetics Residual Field: +11560
Free-Air Anomaly: +1037