Survey Identifier: RNDB12WT
Format Acronym: MGD77
Data Center File Number: 15040184
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): T.SHIPLEY
Project: ROUNDABOUT LEG 12
Funding: NSF OCE86-16368
Survey Departure Date (yyyymmdd): 19881231
Port of Departure: MAJURO,MARSHALL IS.
Survey Arrival Date (yyyymmdd): 19890109
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: 1900C-BOLT AIRGUN
Formats of Seismic Data: ANAL.REC.,35MM FILM,DIGITAL MAG TAPE
Topmost Latitude of Survey: +11
Bottommost Latitude: +06
Leftmost Longitude: +162
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: 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: 9783104
Departure Base Station Description: NE CORNER OF WALL E OF GIBSONS
Arrival Base Station Gravity: 9783104
Arrival Base Station Description: NE CORNER OF WALL E OF GIBSONS
Additional Documentation: PROCESSED BY GEOLOGICAL DATA CENTER, SCRIPPS INSTITUTION OF OCEANOGRAPHY, DEPTHS CORRECTED FOR 5 METER SHIP DRAFT. 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: 13896
Min/Max Data Record:
Date: 1988 12 31
Latitude: +6.03122
Longitude: +162.01959
Bathymetry, 2- Way Traveltime: 000507
Bathymetry, Corrected Depth: 38.0
Magnetics Total Field, 1st Sensor: 338880
Magnetics Residual Field: -01882
Observed Gravity: 9778974
Free-Air Anomaly: -3169
Min/Max Data Record:
Date: 1989 01 09
Latitude: +10.09113
Longitude: +171.36684
Bathymetry, 2- Way Traveltime: 069867
Bathymetry, Corrected Depth: 5266.0
Magnetics Total Field, 1st Sensor: 347090
Magnetics Residual Field: +02305
Observed Gravity: 9784187
Free-Air Anomaly: +2339