Survey Identifier: TUGA03WT


Format Acronym: MGD77
Data Center File Number: 15040180
Parameters Surveyed Code: 55311
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): M. Riedesel
Project: TORTUGA LEG 3
Survey Departure Date (yyyymmdd): 19871203
Port of Departure: ACADEMY BAY, GALAPAGOS
Survey Arrival Date (yyyymmdd): 19871216
Port of Arrival: SAN DIEGO, CALIFORNIA
Navigation Instrumentation: SATNAV/GPS,AUTO LOG GYRO+2D DOPPLER SPD
Geodetic Datum/Position: LINEAR INTERP.BETWEEN ADJACENT FIXES
Bathymetry Instrumentation: SEABEAM VERT.BEAM(2&2/3DEG)&3.5KHZ(WIDE)
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
Topmost Latitude of Survey: +33
Bottommost Latitude: -01
Leftmost Longitude: -118
Rightmost Longitude: -090
General Digitizing Rate of Bathymetry: 010
General Sampling Rate of Bathymetry: 1PING IN H20
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
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: 10
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAG SYSTEM 1967
Reference System Code: 3
Reference System: IGSN-71
Additional Documentation: DEPTHS CORRECTED FOR 5 METER SHIP DRAFT.
Number of Data Records: 9762

Min/Max Data Record:
Date: 1987 12 03
Latitude: -0.78340
Longitude: -117.23700
Bathymetry, 2- Way Traveltime: 014933
Bathymetry, Corrected Depth: 1115.0
Magnetics Total Field, 1st Sensor: 321210
Magnetics Residual Field: -09448

Min/Max Data Record:
Date: 1987 12 16
Latitude: +32.70683
Longitude: -90.07179
Bathymetry, 2- Way Traveltime: 064000
Bathymetry, Corrected Depth: 4813.0
Magnetics Total Field, 1st Sensor: 425390
Magnetics Residual Field: +14500