Survey Identifier: BT8104
Format Acronym: MGD77
Data Center File Number: 05010011
Parameters Surveyed Code: 55513
File Creation Date (yyyymmdd): 19840416
Source Institution: GEOPHYSICS DIVSION, 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 1
Funding: NZ GOVERNMENT
Survey Departure Date (yyyymmdd): 19811012
Port of Departure: WELLINGTON, NEW ZEALAND
Survey Arrival Date (yyyymmdd): 19811027
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, ELSEC
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: -49
Leftmost Longitude: +174
Rightmost Longitude: -178
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 PEAK AND THOUGHS
General Digitizing Rate of Magnetics: 150
General Sampling Rate of Magnetics: 54
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: 9802893
Departure Base Station Description: WELLINGTON, NEW ZEALAND
Additional Documentation: DATA RECORDED IN NEW ZEALAND STANDARD TIME, BATHYMETRY CORRECTED FOR DRAUGHT AND WATER DENSITY
Number of Data Records: 15534
Min/Max Data Record:
Date: 1981 10 15
Latitude: -48.52000
Longitude: -179.99980
Bathymetry, Corrected Depth: 58.0
Magnetics Total Field, 1st Sensor: 575800
Magnetics Residual Field: -06840
Free-Air Anomaly: -0995
Min/Max Data Record:
Date: 1981 10 27
Latitude: -41.54000
Longitude: +179.99940
Bathymetry, Corrected Depth: 4425.0
Magnetics Total Field, 1st Sensor: 606550
Magnetics Residual Field: +07230
Free-Air Anomaly: +1102