Survey Identifier: WEST08MV
Format Acronym: MGD77
Data Center File Number: 15020155
Parameters Surveyed Code: 55511
File Creation Date (yyyymmdd): 19
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V MELVILLE
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): JOHN ORCUTT
Project: WESTWARD EXPEDITION LEG 08
Funding: NSF
Survey Departure Date (yyyymmdd): 19941116
Port of Departure: DUNEDIN, NEW ZEALAND
Survey Arrival Date (yyyymmdd): 19951205
Port of Arrival: FREMANTLE, AUSTRALIA
Navigation Instrumentation: GPS,TRIMBLE MOD. 4000AX
Geodetic Datum/Position: LINEAR INTERP.BETWEEN ADJACENT FIXES
Bathymetry Instrumentation: SEABEAM 2000 w/ SIDESCAN
Additional Forms of Bathymetric Data: ANAL.REC,35MM FILM,DIGITAL MAG. TAPE
Magnetics Instrumentation: GEOMETRICS MAGNETOMETER MOD-G 801/3
Additional Forms of Magnetics Data: ANAL.REC, 35MM FILM, DIGITAL TAPE
Gravity Instrumentation: BELL BGM-3 METER
Additional Forms of Gravity Data: DIGITAL TAPE
Seismic Instrumentation: OCEAN BOTTOM SEISMOGRAPHS
Formats of Seismic Data: CONTACT CHIEF SCIENTIST
Topmost Latitude of Survey: -31
Bottommost Latitude: -51
Leftmost Longitude: +114
Rightmost Longitude: +171
General Digitizing Rate of Bathymetry: 010
General Sampling Rate of Bathymetry: 1PING IN H2O
Assumed Sound Velocity: 15000
Interpolation Scheme: 1 MINUTE VALUES EXTRACTED FROM SEABEAM VERTICAL BEAM
General Digitizing Rate of Magnetics: 010
General Sampling Rate of Magnetics: 06
Reference Field Code: 03
Reference Field: IGRF-1990
Method of Applying Residual Field: LIN.INTERP.POINTS WITHIN ONE DEGREE SQUARE
General Digitizing Rate of Gravity: 010
General Sampling Rate of Gravity: 01
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAG SYSTEM 1967
Reference System Code: 3
Reference System: SYSTEM IGSN 71
Corrections Applied: EOTVOS AND METER DRIFT
Departure Base Station Gravity: 9807275
Departure Base Station Description: DOD 0249-0 DUNEDIN, NEW ZEALAND
Arrival Base Station Gravity: 9794001
Arrival Base Station Description: DOD 2023-1 FREMANTLE
Additional Documentation: PROCESSED BY GEOLOGICAL DATA CENTER, SCRIPPS INSTITUTION OF OCEANOGRAPHY, DEPTHS CORRECTED FOR 5 METER SHIP DRAFT. NAVIGATION: DR BETWEEN 1 MINUTE, INTERVAL GPS FIXES. GPS PRESENT 24 HRS/DAY. GRAVITY: 1 SEC METER COUNTS, FILTERED WITH 99 DEC STD.DEV. GAUSSIAN CONVOLUTION WINDOW. FREE AIR ANOMALY, SPIKES MAY BE PRESENT BECAUSE SAME FILTER NOT USED FOR NAVIGATION. FOLLOWING, INFO FROM MULTIBEAM BATHYMETRY: Heading Sensor Sperry MK23 Gyro; Navigation:, Horizontal_Datum WGS84; Surface sound velocity sensor.
Number of Data Records: 27209
Min/Max Data Record:
Date: 1994 11 16
Latitude: -50.36248
Longitude: +114.56125
Bathymetry, 2- Way Traveltime: 001347
Bathymetry, Corrected Depth: 101.0
Magnetics Total Field, 1st Sensor: 312760
Magnetics Residual Field: -08729
Observed Gravity: 9793359
Free-Air Anomaly: -1437
Min/Max Data Record:
Date: 1994 12 05
Latitude: -31.91683
Longitude: +170.83517
Bathymetry, 2- Way Traveltime: 083493
Bathymetry, Corrected Depth: 6318.0
Magnetics Total Field, 1st Sensor: 669970
Magnetics Residual Field: +31699
Observed Gravity: 9811683
Free-Air Anomaly: +0921