Survey Identifier: DRFT11RR
Format Acronym: MGD77
Data Center File Number: 15390018
Parameters Surveyed Code: 51511
File Creation Date (yyyymmdd): 20020317
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V Revelle
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): Transit
Project: Drift Cruise LEG 11
Funding: Funding Agency
Survey Departure Date (yyyymmdd): 20020308
Port of Departure: Pago Pago, American Samoa
Survey Arrival Date (yyyymmdd): 20020316
Port of Arrival: Hilo, USA
Navigation Instrumentation: TRIMBLE TASMAN P(Y) GPS
Geodetic Datum/Position: LINEAR FIT TO 60 SEC FIXES
Bathymetry Instrumentation: SEABEAM 2100 12kHz, w/SIDESCAN
Additional Forms of Bathymetric Data: ANAL.REC,35MM FILM,DIGITAL MAG. TAPE
Topmost Latitude of Survey: 20
Bottommost Latitude: -15
Leftmost Longitude: -172
Rightmost Longitude: -154
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: TO BE F
Departure Base Station Description: ILLED IN
Arrival Base Station Gravity: TO BE F
Arrival Base Station Description: ILLED IN
Additional Documentation: PROCESSED BY SHIPBOARD COMPUTER GROUP, SCRIPPS INSTITUTION OF OCEANOGRAPHY, THIS DATA WAS CREATED AUTOMATICALLY WITH OUT EDITTING OF THE RAW DATA. 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: 12961
Min/Max Data Record:
Date: 2002 03 07
Latitude: -14.78257
Longitude: -171.08249
Bathymetry, 2- Way Traveltime: 000333
Bathymetry, Corrected Depth: 25.0
Observed Gravity: 9779396
Free-Air Anomaly: -0702
Min/Max Data Record:
Date: 2002 03 16
Latitude: +19.76355
Longitude: -154.76172
Bathymetry, 2- Way Traveltime: 080107
Bathymetry, Corrected Depth: 6064.0
Observed Gravity: 9789125
Free-Air Anomaly: +2925