Survey Identifier: WEST09MV


Format Acronym: MGD77
Data Center File Number: 15020167
Parameters Surveyed Code: 55531
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): JAMES COCHRAN,JEAN C.SEMPERE
Project: WESTWARD EXPEDITION LEG 09
Funding: NSF
Survey Departure Date (yyyymmdd): 19941210
Port of Departure: FREMANTLE,AUSTRALIA
Survey Arrival Date (yyyymmdd): 19950122
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: NONE COLLECTED
Topmost Latitude of Survey: -31
Bottommost Latitude: -52
Leftmost Longitude: 091
Rightmost Longitude: 120
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: 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: 62811

Min/Max Data Record:
Date: 1994 12 10
Latitude: -51.09898
Longitude: +91.38429
Bathymetry, 2- Way Traveltime: 001347
Bathymetry, Corrected Depth: 101.0
Magnetics Total Field, 1st Sensor: 562690
Magnetics Residual Field: -09136
Observed Gravity: 9793099
Free-Air Anomaly: -1010

Min/Max Data Record:
Date: 1995 01 22
Latitude: -31.92419
Longitude: +119.20141
Bathymetry, 2- Way Traveltime: 078507
Bathymetry, Corrected Depth: 5936.0
Magnetics Total Field, 1st Sensor: 653680
Magnetics Residual Field: +18012
Observed Gravity: 9812121
Free-Air Anomaly: +0805