Survey Identifier: HT7701


Format Acronym: MGD77
Data Center File Number: 05010003
Parameters Surveyed Code: 55113
File Creation Date (yyyymmdd): 19840503
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: HIKURANGI TROUGH 1
Funding: NZ GOVERNMENT
Survey Departure Date (yyyymmdd): 19770304
Port of Departure: WELLINGTON, NEW ZEALAND
Survey Arrival Date (yyyymmdd): 19770313
Port of Arrival: WELLINGTON, NEW ZEALAND
Navigation Instrumentation: SATELITE
Geodetic Datum/Position: SATELLITE AND DEAD RECKONING
Bathymetry Instrumentation: 12 KHZ FREQUENCY
Magnetics Instrumentation: PROTON PRECESSION, ELSEC
Seismic Instrumentation: SINGLE CHANNEL
Formats of Seismic Data: MICROFILM AND ANALOG
Topmost Latitude of Survey: -35
Bottommost Latitude: -43
Leftmost Longitude: +174
Rightmost Longitude: +180
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
General Sampling Rate of Magnetics: 54
Reference Field Code: 88
Reference Field: PGRF-75
Method of Applying Residual Field: LINEAR INTERPOLATION BETWEEN NAVGATION POINTS
Additional Documentation: DATA RECORDED IN NEW ZEALAND STANDARD TIME, BATYMETRY CORRECTED FOR DRAUGHT AND WATER DENSITY
Number of Data Records: 6170

Min/Max Data Record:
Date: 1977 03 04
Latitude: -42.51160
Longitude: +174.77330
Bathymetry, Corrected Depth: 121.0
Magnetics Total Field, 1st Sensor: 537980
Magnetics Residual Field: -02680

Min/Max Data Record:
Date: 1977 03 13
Latitude: -35.95000
Longitude: +179.93170
Bathymetry, Corrected Depth: 3574.0
Magnetics Total Field, 1st Sensor: 579430
Magnetics Residual Field: +05360