Survey Identifier: VNTR01WT
Format Acronym: MGD77
Data Center File Number: 15040221
Parameters Surveyed Code: 55333
File Creation Date (yyyymmdd): 19891026
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V T.WASHINGTON
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): N.PISIAS
Project: VENTURE LEG 1
Funding: NSF
Survey Departure Date (yyyymmdd): 19890828
Port of Departure: SAN DIEGO, CALIFORNIA
Survey Arrival Date (yyyymmdd): 19891002
Port of Arrival: MANZANILLO, MEXICO
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: WATER GUNS
Formats of Seismic Data: ANALOGUE RECORDS & 35MM FILM
Topmost Latitude of Survey: +33
Bottommost Latitude: -05
Leftmost Longitude: -118
Rightmost Longitude: -089
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: 9795355
Departure Base Station Description: SIO MAR FAC PIER SITE "TWP"
Arrival Base Station Gravity: 9795355
Arrival Base Station Description: SIO MAR FAC PIER SITE "TWP" 1
Additional Documentation: DEPTHS CORRECTED FOR 5 METER SHIP DRAFT. THE NAVIGATION HAS BEEN ADJUSTED FOR SEABEAM CROSSINGS ON SURVEYS. 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. GRAVITY NOT FUNDED SO ONLY COLLECTED, BUT NOT EDITED OR PROCESSED.
Number of Data Records: 44458
Min/Max Data Record:
Date: 1989 08 28
Latitude: -4.53537
Longitude: -117.24216
Bathymetry, 2- Way Traveltime: 000480
Bathymetry, Corrected Depth: 36.0
Magnetics Total Field, 1st Sensor: 302160
Magnetics Residual Field: -07930
Min/Max Data Record:
Date: 1989 10 02
Latitude: +32.55418
Longitude: -89.11980
Bathymetry, 2- Way Traveltime: 071293
Bathymetry, Corrected Depth: 5376.0
Magnetics Total Field, 1st Sensor: 478970
Magnetics Residual Field: +09766