Survey Identifier: RNDB18WT
Format Acronym: MGD77
Data Center File Number: 15040228
Parameters Surveyed Code: 55333
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.LONSDALE
Project: ROUNDABOUT LEG 18
Funding: NSF,ONR,U.C.FUNDS
Survey Departure Date (yyyymmdd): 19890503
Port of Departure: HONOLULU, HAWAII
Survey Arrival Date (yyyymmdd): 19890530
Port of Arrival: SAN DIEGO, CALIF
Navigation Instrumentation: SATNAV/GPS,AUTO LOG GYRO+2D DOPPLER SPD
Geodetic Datum/Position: LINEAR INTERP.BETWEEN ADJACENT FIXES
Bathymetry Instrumentation: SEABEAM VERTICAL BEAM (2&2/3 DEG) & 3.5
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: ANAL.REC,35MM FILM,DIGITAL MAG. TAPE
Gravity Instrumentation: BELL BGM-3 METER
Additional Forms of Gravity Data: DIGITAL MAG TAPE
Seismic Instrumentation: 1900C-BOLT AIRGUN
Formats of Seismic Data: ANAL.REC.,35MM FILM,DIGITAL MAG TAPE
Topmost Latitude of Survey: +36
Bottommost Latitude: +21
Leftmost Longitude: -158
Rightmost Longitude: -119
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: 9789236
Departure Base Station Description: HONOLULU, SNUG HARBOR PIER 49
Arrival Base Station Gravity: 9795355
Arrival Base Station Description: SIO MarFac Pier, site "TWP"
Additional Documentation: PROCESSED BY GEOLOGICAL DATA CENTER, SCRIPPS INSTITUTION OF OCEANOGRAPHY. SYST_COMMENTS DEPTHS CORRECTED FOR 5 METER SHIP DRAFT, 12.158 kHz, 16 beams. NAVI_INSTRU Amatec-Straza 2-D Doppler speed log; Sperry MK-27 Gyro; Trimble, GPS Receiver, Mod 4000; Trimble Loran C Rec, Mod 200; Magnavox Satellite.. etc, NGDC has multibeam bathymetric data for this cruise, however the tracklines, found here in GEODAS may not exactly correspond to the multibm data available. GRAVITY COLLECTED, BUT NOT EDITED OR PROCESSED.
Number of Data Records: 36913
Min/Max Data Record:
Date: 1989 05 04
Latitude: +21.20056
Longitude: -157.82323
Bathymetry, 2- Way Traveltime: 000987
Bathymetry, Corrected Depth: 74.0
Magnetics Total Field, 1st Sensor: 324260
Magnetics Residual Field: -70192
Min/Max Data Record:
Date: 1989 05 30
Latitude: +35.46926
Longitude: -119.35500
Bathymetry, 2- Way Traveltime: 086547
Bathymetry, Corrected Depth: 6560.0
Magnetics Total Field, 1st Sensor: 492690
Magnetics Residual Field: +11253