Survey Identifier: RNDB06WT
Format Acronym: MGD77
Data Center File Number: 15040182
Parameters Surveyed Code: 55033
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, L. KEIGWIN
Project: ROUNDABOUT LEG 6
Survey Departure Date (yyyymmdd): 19880805
Port of Departure: DUTCH HARBOR, ALASKA
Survey Arrival Date (yyyymmdd): 19880905
Port of Arrival: DUTCH HARBOR, ALASKA
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: +55
Bottommost Latitude: +48
Leftmost Longitude: +164
Rightmost Longitude: -166
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: 9815384
Departure Base Station Description: DOD 2178-0 DUTCH HARBOR
Arrival Base Station Gravity: 9815384
Arrival Base Station Description: DOD 2178-0 DUTCH HARBOR
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; Magnavox Satellite Receiver, Mod 4102; ITT Transit, Satellite Receiver, Mod 5001. GRAVITY PROCESSED IN NOVEMBER 1989, NGDC has multibeam bathymetric data for this cruise, however the tracklines, found here in GEODAS may not exactly correspond to the multibm data available.
Number of Data Records: 43236
Min/Max Data Record:
Date: 1988 08 06
Latitude: +48.13103
Longitude: -179.99940
Bathymetry, 2- Way Traveltime: 001080
Bathymetry, Corrected Depth: 81.0
Magnetics Total Field, 1st Sensor: 461870
Magnetics Residual Field: -08172
Min/Max Data Record:
Date: 1988 09 05
Latitude: +54.26711
Longitude: +179.99736
Bathymetry, 2- Way Traveltime: 096507
Bathymetry, Corrected Depth: 7330.0
Magnetics Total Field, 1st Sensor: 506100
Magnetics Residual Field: +13050