Survey Identifier: DRFT09RR
Format Acronym: MGD77
Data Center File Number: 15390017
Parameters Surveyed Code: 51511
File Creation Date (yyyymmdd): 20020307
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V Revelle
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): Dr. Eric Terrill
Project: Drift Cruise LEG 09
Funding: NSF
Survey Departure Date (yyyymmdd): 20020225
Port of Departure: Lyttleton, New Zealand
Survey Arrival Date (yyyymmdd): 20020307
Port of Arrival: Pago Pago, American Samoa
Navigation Instrumentation: PCODE GPS
Geodetic Datum/Position: SMOOTHED FIT TO 60 SEC FIXES
Bathymetry Instrumentation: SIMRAD Multibeam
Additional Forms of Bathymetric Data: DIGITAL MAG. TAPE
Gravity Instrumentation: Bell BGM-6SN 228-loan from NAVO
Additional Forms of Gravity Data: DIGITAL MAG TAPE
Topmost Latitude of Survey: -14
Bottommost Latitude: -44
Leftmost Longitude: 172
Rightmost Longitude: -170
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: 980494.
Departure Base Station Description: DOD0217-0 CHRISTCHURCH
Arrival Base Station Gravity: 978923.
Arrival Base Station Description: 6 DOD0259-J HONOLULU
Additional Documentation: PROCESSED BY SHIPBOARD COMPUTER GROUP, SCRIPPS INSTITUTION OF OCEANOGRAPHY, DEPTHS CORRECTED FOR 5 METER SHIP DRAFT. NAVIGATION: PCODE GPS, 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: 15315
Min/Max Data Record:
Date: 2002 02 25
Latitude: -43.61228
Longitude: -179.99966
Bathymetry, 2- Way Traveltime: 004987
Bathymetry, Corrected Depth: 377.0
Observed Gravity: 9782623
Free-Air Anomaly: -2335
Min/Max Data Record:
Date: 2002 03 07
Latitude: -14.27162
Longitude: +179.99834
Bathymetry, 2- Way Traveltime: 114373
Bathymetry, Corrected Depth: 8778.0
Observed Gravity: 9805005
Free-Air Anomaly: +3000