Survey Identifier: HT8103
Format Acronym: MGD77
Data Center File Number: 05010010
Parameters Surveyed Code: 55133
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): D.J. BENNETT AND K.B. LEWIS
Project: HIKURANGI THROUGH 3
Funding: NZ GOVERNMENT
Survey Departure Date (yyyymmdd): 1981
Port of Departure: WELLINGTON, NEW ZEALAND
Survey Arrival Date (yyyymmdd): 1981
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
Seismic Instrumentation: SINGLE CHANNEL
Topmost Latitude of Survey: -39
Bottommost Latitude: -43
Leftmost Longitude: +173
Rightmost Longitude: +180
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
Additional Documentation: DATA RECORDED IN NEW ZEALAND STANDARD TIME, BATHYMETRY CORRECTED FOR DRAUGHT AND WATER DENSITY
Number of Data Records: 1492
Min/Max Data Record:
Date: 1981 04 09
Latitude: -42.95990
Longitude: +173.81320
Bathymetry, Corrected Depth: 15.0
Magnetics Total Field, 1st Sensor: 556050
Magnetics Residual Field: -01510
Min/Max Data Record:
Date: 1981 04 29
Latitude: -39.48630
Longitude: +179.11090
Bathymetry, Corrected Depth: 3767.0
Magnetics Total Field, 1st Sensor: 571420
Magnetics Residual Field: +04780