Survey Identifier: CH8004
Format Acronym: MGD77
Data Center File Number: 05010009
Parameters Surveyed Code: 55513
File Creation Date (yyyymmdd): 19840514
Source Institution: GEOPHYSICS DIVISION, DSIR, NEW ZEALAND
Country: NEW ZEALAND
Platform Name: GRV TANGAROA
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): D. J. BENNETT
Project: CHALLENGER PLATEAU 2
Funding: NZ GOVERNMENT
Survey Departure Date (yyyymmdd): 19801021
Port of Departure: WELLINGTON, NEW ZEALAND
Survey Arrival Date (yyyymmdd): 19801104
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: -39
Bottommost Latitude: -44
Leftmost Longitude: +165
Rightmost Longitude: +175
General Digitizing Rate of Bathymetry: 150
General Sampling Rate of Bathymetry: 1/SECOND
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
Interpolation Scheme: 15-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: 9802894
Departure Base Station Description: WELLINGTON, NEW ZEALAND
Additional Documentation: DATA PRE 801026 0000 RECORDED IN NEW ZEALAND STANDARD TIM, DATA POST 801027 0000 RECORDED IN NEW ZEALAND DAYLIGHT TIME, BATHYMETRY CORRECTED FOR DRAUGHT AND WATER DENSTIY
Number of Data Records: 13076
Min/Max Data Record:
Date: 1980 10 21
Latitude: -43.38830
Longitude: +165.65280
Bathymetry, Corrected Depth: 146.0
Magnetics Total Field, 1st Sensor: 569370
Magnetics Residual Field: -05200
Free-Air Anomaly: -1114
Min/Max Data Record:
Date: 1980 11 04
Latitude: -39.25170
Longitude: +174.83000
Bathymetry, Corrected Depth: 4340.0
Magnetics Total Field, 1st Sensor: 595900
Magnetics Residual Field: +06520
Free-Air Anomaly: +0556