Survey Identifier: WEST10MV
Format Acronym: MGD77
Data Center File Number: 15020168
Parameters Surveyed Code: 55511
File Creation Date (yyyymmdd): 19990901
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V MELVILLE
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): D.CHRISTIE
Project: WESTWARD EXPEDITION LEG 10 NSF
Survey Departure Date (yyyymmdd): 19950129
Port of Departure: FREMANTLE,AUSTRALIA
Survey Arrival Date (yyyymmdd): 19950313
Port of Arrival: HOBART,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: NONE COLLECTED
Topmost Latitude of Survey: -31
Bottommost Latitude: -51
Leftmost Longitude: 087
Rightmost Longitude: 148
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: 9794001
Departure Base Station Description: DOD 2023-1 FREMANTLE AUS
Arrival Base Station Gravity: 9804178
Arrival Base Station Description: DOD3678-7 HOBART, TASMANIA
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. CAUTION: GRAVITY METER BEGAN, MALFUNCTIONING BEFORE THE END OF THE LEG. GRAVITY: 1 SEC METER COUNTS FILTERED, WITH 99 DEC STD.DEV. GAUSSIAN CONVOLUTION WINDOW. FREE AIR ANOMALY SPIKES, PRESENT BECAUSE SAME FILTER NOT USED FOR NAVIGATION. FOLLOWING INFO FROM, MULTIBEAM BATHYMETRY: Navigation: Horizontal_Datum WGS84.
Number of Data Records: 61615
Min/Max Data Record:
Date: 1995 01 28
Latitude: -50.38647
Longitude: +87.90618
Bathymetry, 2- Way Traveltime: 000547
Bathymetry, Corrected Depth: 41.0
Magnetics Total Field, 1st Sensor: 551310
Magnetics Residual Field: -07314
Observed Gravity: 9794239
Free-Air Anomaly: -0995
Min/Max Data Record:
Date: 1995 03 12
Latitude: -31.91267
Longitude: +147.52417
Bathymetry, 2- Way Traveltime: 081773
Bathymetry, Corrected Depth: 6190.0
Magnetics Total Field, 1st Sensor: 657640
Magnetics Residual Field: +13757
Observed Gravity: 9811187
Free-Air Anomaly: +0748