Survey Identifier: PPTU01WT
Format Acronym: MGD77
Data Center File Number: 15040160
Parameters Surveyed Code: 55511
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): MCCLAIN J.
Project: PAPATUA LEG 1
Funding: NSF OCE83-17741
Survey Departure Date (yyyymmdd): 19850917
Port of Departure: SAN DIEGO,CALIFORNIA
Survey Arrival Date (yyyymmdd): 19851016
Port of Arrival: MANZANILLO,MEXICO
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)
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: ASKANIA GSS2,ANSCHUTZ ELECT. GYRO TABLE
Additional Forms of Gravity Data: ANAL.REC,35MM FILM,DIGITAL MAG.TAPE
Seismic Instrumentation: NONE COLLECTED
Formats of Seismic Data: NONE COLLECTED
Topmost Latitude of Survey: +33
Bottommost Latitude: +12
Leftmost Longitude: -118
Rightmost Longitude: -102
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 1980
Method of Applying Residual Field: LIN.INTERP.POINTS WITHIN ONE DEGREE SQUARE
General Digitizing Rate of Gravity: 010
General Sampling Rate of Gravity: 20
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAG SYSTEM 1967
Reference System Code: 2
Reference System: POTSDAM SYSTEM
Departure Base Station Gravity: 9772630
Departure Base Station Description: NIMITZ MARINE FACILITY
Arrival Base Station Gravity: 9772630
Arrival Base Station Description: NONE
Additional Documentation: DEPTHS CORRECTED FOR 5 METER SHIP DRAFT, 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: 41279
Min/Max Data Record:
Date: 1985 09 17
Latitude: +12.40983
Longitude: -117.22733
Bathymetry, 2- Way Traveltime: 001320
Bathymetry, Corrected Depth: 99.0
Magnetics Total Field, 1st Sensor: 374260
Magnetics Residual Field: -08493
Observed Gravity: 9780835
Free-Air Anomaly: -1983
Min/Max Data Record:
Date: 1985 10 16
Latitude: +32.54100
Longitude: -102.04256
Bathymetry, 2- Way Traveltime: 068440
Bathymetry, Corrected Depth: 5155.0
Magnetics Total Field, 1st Sensor: 397030
Magnetics Residual Field: +03160
Observed Gravity: 9789887
Free-Air Anomaly: +1714