Survey Identifier: DRFT14RR
Format Acronym: MGD77
Data Center File Number: 15390020
Parameters Surveyed Code: 51511
File Creation Date (yyyymmdd): 20020503
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V Revelle
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): Peter Worcester
Project: Drift Cruise LEG 14
Funding: NSF
Survey Departure Date (yyyymmdd): 20020423
Port of Departure: Honolulu, Hawaii
Survey Arrival Date (yyyymmdd): 20020504
Port of Arrival: Honolulu, Hawaii
Navigation Instrumentation: TRIMBLE TASMAN P(Y) GPS
Geodetic Datum/Position: LINEAR FIT TO 60 SEC FIXES
Bathymetry Instrumentation: SIMRAD EM120 multibeam
Additional Forms of Bathymetric Data: Digital Mag. Tape
Magnetics Instrumentation: None collected
Gravity Instrumentation: BELL BGM-6 S/N228
Additional Forms of Gravity Data: Digital Mag. Tape
Seismic Instrumentation: None collected
Topmost Latitude of Survey: 22
Bottommost Latitude: 16
Leftmost Longitude: -163
Rightmost Longitude: -157
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: 978923
Departure Base Station Description: Snug Harbor, Sand Is., Honolulu
Arrival Base Station Gravity: 978923
Arrival Base Station Description: SnugHarbor,SandIs.Honolulu
Additional Documentation: PROCESSED BY SHIPBOARD COMPUTER GROUP, 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: 14080
Min/Max Data Record:
Date: 2002 04 24
Latitude: +16.39976
Longitude: -162.68966
Bathymetry, 2- Way Traveltime: 001000
Bathymetry, Corrected Depth: 75.0
Observed Gravity: 9783947
Free-Air Anomaly: -0445
Min/Max Data Record:
Date: 2002 05 03
Latitude: +21.31629
Longitude: -157.86805
Bathymetry, 2- Way Traveltime: 075987
Bathymetry, Corrected Depth: 5740.0
Observed Gravity: 9789489
Free-Air Anomaly: +2134