Survey Identifier: PASC04WT
Format Acronym: MGD77
Data Center File Number: 15040143
Parameters Surveyed Code: 55531
File Creation Date (yyyymmdd): 19830701
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V THOMAS WASHINGTON
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): HEY R.
Project: CERES LEG 2 <NSF OCE80-24772>
Survey Departure Date (yyyymmdd): 19830401
Port of Departure: EASTER ISLAND
Survey Arrival Date (yyyymmdd): 19830430
Port of Arrival: CALLAO,PERU
Navigation Instrumentation: SATNAV,AUTO LOG GYRO+2D DOPPLER SPD LOG
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: VARIAN MFD PROTON PRECESSION MOD 4970
Additional Forms of Magnetics Data: ANAL.RECORDS,CARDS,35MMFILM
Gravity Instrumentation: ASKANIA GSS2,ANSCHUTZ ELECT. GYRO TABLE
Additional Forms of Gravity Data: ANAL.REC,DIGITAL MAG. TAPE
Topmost Latitude of Survey: -12
Bottommost Latitude: -30
Leftmost Longitude: -118
Rightmost Longitude: -077
General Digitizing Rate of Bathymetry: 010
General Sampling Rate of Bathymetry: 1TO10SECONDS
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 88
Interpolation Scheme: 1 MINUTE INTERVAL
General Digitizing Rate of Magnetics: 010
General Sampling Rate of Magnetics: 06
Reference Field Code: 80
Reference Field: IGRF 1980
Method of Applying Residual Field: LIN. INTERP.POINTS WITHIN ONE DEGREE SQUARE
General Digitizing Rate of Gravity: 010
Additional Documentation: DEPTH CORRECTED FOR SHIP DRAFT (5M), REAL TIME SEABEAM SWATHS BOOKS ON MICROFILM
Number of Data Records: 41478
Min/Max Data Record:
Date: 1983 04 01
Latitude: -29.10350
Longitude: -117.90440
Bathymetry, 2- Way Traveltime: 002175
Bathymetry, Corrected Depth: 163.0
Magnetics Total Field, 1st Sensor: 272410
Magnetics Residual Field: -13740
Free-Air Anomaly: -2785
Min/Max Data Record:
Date: 1983 04 30
Latitude: -12.04031
Longitude: -77.14551
Bathymetry, 2- Way Traveltime: 078625
Bathymetry, Corrected Depth: 5946.0
Magnetics Total Field, 1st Sensor: 360240
Magnetics Residual Field: +11030
Free-Air Anomaly: +0935