Survey Identifier: RNDB10WT
Format Acronym: MGD77
Data Center File Number: 15040215
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19890119
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V T.WASHINGTON
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): WINTERER,NATLAND,McNUTT,SAGER
Project: ROUNDABOUT LEG 10
Funding: NSF OCE87-02835
Survey Departure Date (yyyymmdd): 19881109
Port of Departure: YOKOSUKA, JAPAN
Survey Arrival Date (yyyymmdd): 19881212
Port of Arrival: MAJURO, MARSHALL IS.
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: 80 CU IN H2O & 1900C-BOLT AIRGUN
Formats of Seismic Data: ANAL.REC.,35MM FILM,DIGITAL MAG TAPE
Topmost Latitude of Survey: +36
Bottommost Latitude: +07
Leftmost Longitude: +139
Rightmost Longitude: -178
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: 03
Reference Field: IGRF-1985
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: 9797645
Departure Base Station Description: YOKOSUKA,JAPAN BERTH 8
Arrival Base Station Gravity: 9783101
Arrival Base Station Description: MARSHALL IS BEHIND GIBSON STORE
Additional Documentation: 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; Magnavox Satellite Rec, Mod 4102; Trimble Loran C, 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: 1 SEC METER COUNTS FILTERED WITH 25 POLE FILTER WITH 148 SEC DELAY. FREE AIR ANOMALY SPIKES PRESENT BECAUSE SAME FILTER NOT USED FOR NAVIGATION.
Number of Data Records: 48174
Min/Max Data Record:
Date: 1988 11 09
Latitude: +7.08450
Longitude: -179.99896
Bathymetry, 2- Way Traveltime: 001013
Bathymetry, Corrected Depth: 76.0
Magnetics Total Field, 1st Sensor: 325220
Magnetics Residual Field: -16490
Observed Gravity: 9780882
Free-Air Anomaly: -3989
Min/Max Data Record:
Date: 1988 12 12
Latitude: +35.25783
Longitude: +179.99855
Bathymetry, 2- Way Traveltime: 116347
Bathymetry, Corrected Depth: 8944.0
Magnetics Total Field, 1st Sensor: 452730
Magnetics Residual Field: +07167
Observed Gravity: 9799258
Free-Air Anomaly: +2453