Survey Identifier: LH7803
Format Acronym: MGD77
Data Center File Number: 05010005
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): D. J. BENNETT
Project: LORD HOWE RISE
Funding: NZ GOVERNMENT
Survey Departure Date (yyyymmdd): 19780429
Port of Departure: WELLINGTON, NEW ZEALAND
Survey Arrival Date (yyyymmdd): 19780515
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: -35
Bottommost Latitude: -42
Leftmost Longitude: +160
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
General Sampling Rate of Magnetics: 54
Reference Field Code: 88
Reference Field: PGRF-75
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: 9802932
Departure Base Station Description: WELLINGTON, NEW ZEALAND
Additional Documentation: DATA RECORD IN NEW ZEALAND STANDARD TIME, BATHYMETRY CORRECTED FOR DRAUGHT AND WATER DENSTIY
Number of Data Records: 18994
Min/Max Data Record:
Date: 1978 04 29
Latitude: -41.38840
Longitude: +160.58590
Bathymetry, Corrected Depth: 42.0
Magnetics Total Field, 1st Sensor: 564650
Magnetics Residual Field: -03780
Free-Air Anomaly: -0838
Min/Max Data Record:
Date: 1978 05 15
Latitude: -35.08200
Longitude: +174.69310
Bathymetry, Corrected Depth: 4773.0
Magnetics Total Field, 1st Sensor: 593250
Magnetics Residual Field: +11640
Free-Air Anomaly: +0437