Survey Identifier: TUNE08WT
Format Acronym: MGD77
Data Center File Number: 15040232
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V T.WASHINGTON
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): P.JOHNSON
Project: TUNES LEG 8
Funding: OCE91-02183
Survey Departure Date (yyyymmdd): 19920101
Port of Departure: APRA, GUAM
Survey Arrival Date (yyyymmdd): 19920131
Port of Arrival: MAJURO, MARSHALL ISLANDS
Navigation Instrumentation: GPS,AUTO LOG GYRO+2D DOPPLER SPD
Geodetic Datum/Position: LINEAR INTERP.BETWEEN ADJACENT FIXES
Bathymetry Instrumentation: SEABEAM VERTICAL BEAM (2&2/3 DEG)&3.5KHZ
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: DIGITAL MAG. TAPE
Gravity Instrumentation: BELL BGM-3 METER
Additional Forms of Gravity Data: DIGITAL MAG TAPE
Seismic Instrumentation: WATER GUN 80 CUBIC INCH
Formats of Seismic Data: ANAL.REC,35MM FILM,DIGITAL MAG. TAPE
Topmost Latitude of Survey: +24
Bottommost Latitude: +07
Leftmost Longitude: +144
Rightmost Longitude: +172
General Digitizing Rate of Bathymetry: 010
General Sampling Rate of Bathymetry: 1PING IN H2O
Assumed Sound Velocity: 15000
Interpolation Scheme: 1 MINUTE AVERAGES EXTRACTED FROM SEABEAM VERTICAL BEAMS
General Digitizing Rate of Magnetics: 010
General Sampling Rate of Magnetics: 06
Reference Field Code: 88
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: 9785255
Departure Base Station Description: GUAM DOD0061-7
Arrival Base Station Gravity: 9795355
Arrival Base Station Description: SIO Mar Fac Pier San Diego
Additional Documentation: PROCESSED BY GEOLOGICAL DATA CENTER, SCRIPPS INSTITUTION OF OCEANOGRAPHY. DEPTHS CORRECTED FOR 5 METER SHIP DRAFT. NAV.:DR CSE/SPD BETWEEN 10 MINUTE INTERVAL GPS FIXES. GRAVITY: 1 SEC METER COUNTS FILTERED WITH 25 POLE FILTER WITH 148 SEC DELAY. MEDIAN FILTER WITH 7.5 MINUTE WIDTH THEN APPLIED TO GRAVITY TO REMOVE SPIKES. GRAVITY COLLECTED ON WHOLE LEG. PROCESSED ONLY FOR JAN 5-11 & JAN 27-31
Number of Data Records: 43593
Min/Max Data Record:
Date: 1992 01 01
Latitude: +7.08583
Longitude: +144.15715
Bathymetry, 2- Way Traveltime: 003600
Bathymetry, Corrected Depth: 274.0
Magnetics Total Field, 1st Sensor: 327900
Magnetics Residual Field: -14162
Observed Gravity: 9783849
Free-Air Anomaly: -0357
Min/Max Data Record:
Date: 1992 01 31
Latitude: +23.17775
Longitude: +171.36615
Bathymetry, 2- Way Traveltime: 123427
Bathymetry, Corrected Depth: 9518.0
Magnetics Total Field, 1st Sensor: 368640
Magnetics Residual Field: +06146
Observed Gravity: 9787798
Free-Air Anomaly: +0328