Survey Identifier: COOK18MV
Format Acronym: MGD77
Data Center File Number: 15020210
Parameters Surveyed Code: 55511
File Creation Date (yyyymmdd): 20020112
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V Melville
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): Transit
Project: Cook Expedition LEG 18
Funding: Funding Agency
Survey Departure Date (yyyymmdd): 20020104
Port of Departure: Papeete, Tahiti
Survey Arrival Date (yyyymmdd): 20020113
Port of Arrival: Lyttelton, New Zealand
Navigation Instrumentation: TRIMBLE TASMAN P(Y) GPS
Geodetic Datum/Position: LINEAR FIT TO 60 SEC FIXES
Bathymetry Instrumentation: SEABEAM 2000 12kHz, w/SIDESCAN
Additional Forms of Bathymetric Data: ANAL.REC,35MM FILM,DIGITAL MAG. TAPE
Magnetics Instrumentation: GEOMETRICS 886
Additional Forms of Magnetics Data: DIGITAL TAPE
Gravity Instrumentation: BELL BGM-3 METER S/N 224
Additional Forms of Gravity Data: DIGITAL TAPE
Seismic Instrumentation: None collected
Topmost Latitude of Survey: -17
Bottommost Latitude: -44
Leftmost Longitude: 172
Rightmost Longitude: -149
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 MULTI-BEAM 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: 978698.
Departure Base Station Description: 9DOD 2080-9 Papeete,Tahiti
Arrival Base Station Gravity: 980494.
Arrival Base Station Description: 2DOD 0217.7 Lyttleton,NZ
Additional Documentation: PROCESSED BY SHIPBOARD TECHNICAL SUPPORT,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 PRESENT BECAUSE SAME FILTER, NOT USED FOR NAVIGATION
Number of Data Records: 11644
Min/Max Data Record:
Date: 2002 01 04
Latitude: -43.60597
Longitude: -179.99771
Bathymetry, 2- Way Traveltime: 000320
Bathymetry, Corrected Depth: 24.0
Magnetics Total Field, 1st Sensor: 421470
Magnetics Residual Field: -11903
Observed Gravity: 9785884
Free-Air Anomaly: -1057
Min/Max Data Record:
Date: 2002 01 12
Latitude: -17.67547
Longitude: +179.99870
Bathymetry, 2- Way Traveltime: 077613
Bathymetry, Corrected Depth: 5864.0
Magnetics Total Field, 1st Sensor: 676130
Magnetics Residual Field: +95954
Observed Gravity: 9805792
Free-Air Anomaly: +1253