Survey Identifier: WEST03MV
Format Acronym: MGD77
Data Center File Number: 15020149
Parameters Surveyed Code: 55311
File Creation Date (yyyymmdd): 19961230
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V MELVILLE
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): S.BLOOMER,P.CASTILLO
Project: WESTWARD LEG 3
Funding: NSF OCE94-00707
Survey Departure Date (yyyymmdd): 19940214
Port of Departure: WELLINGTON, NEW ZEALAND
Survey Arrival Date (yyyymmdd): 19940321
Port of Arrival: IQUIQUE, CHILE
Navigation Instrumentation: GPS,TRIMBLE MOD. 4000AX
Geodetic Datum/Position: BEST FIT 2ND ORDER POLYNOMIAL CURVE
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: -20
Bottommost Latitude: -58
Leftmost Longitude: +174
Rightmost Longitude: -070
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: 9786989
Departure Base Station Description: DOD 2080-9 PAPEETE, TAHITI
Arrival Base Station Gravity: 9786659
Arrival Base Station Description: DOD 2254-1 IQUIQUE, CHILE
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. SEABEAM COLLECTED IN ANCILLARY MODE. GRAVITY COLLECTED BUT, NOT PROCESSED (WELLINGTON TIE WAS BAD; USE PREVIOUS TAHITI TIE). FOLLOWING, INFO FROM MULTIBEAM BATHYMETRY: Heading Sensor Sperry MK 23 Gyro; Vertical, reference unit sensor Datawell Hippy Model 120; Navigation: Horizontal_Datum, WGS84; Uncorrected meters, assumed SV 1500m/sec; Surface sound velocity sensor
Number of Data Records: 51814
Min/Max Data Record:
Date: 1994 02 13
Latitude: -57.12003
Longitude: -179.99753
Bathymetry, 2- Way Traveltime: 000147
Bathymetry, Corrected Depth: 11.0
Magnetics Total Field, 1st Sensor: 243090
Magnetics Residual Field: -15422
Min/Max Data Record:
Date: 1994 03 21
Latitude: -20.19393
Longitude: +179.99761
Bathymetry, 2- Way Traveltime: 105653
Bathymetry, Corrected Depth: 8070.0
Magnetics Total Field, 1st Sensor: 583890
Magnetics Residual Field: +09464