Survey Identifier: PPTU04WT
Format Acronym: MGD77
Data Center File Number: 15040163
Parameters Surveyed Code: 55111
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): HAWKINS, J.
Project: PAPATUA LEG 4
Funding: NSF OCE83-17741
Survey Departure Date (yyyymmdd): 19860101
Port of Departure: PAGO PAGO, SAMOA
Survey Arrival Date (yyyymmdd): 19860127
Port of Arrival: NUKUALOFA,TONGATAPU,TONGA
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)
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,DIGITAL MAG. TAPE
Gravity Instrumentation: NONE COLLECTED
Seismic Instrumentation: NONE COLLECTED
Formats of Seismic Data: NONE COLLECTED
Topmost Latitude of Survey: -14
Bottommost Latitude: -22
Leftmost Longitude: -180
Rightmost Longitude: -170
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
Additional Documentation: PROCESSED BY GEOLOGICAL DATA CENTER, SCRIPPS INSTITUTION OF OCEANOGRAPHY, SYST_COMMENTS DEPTHS CORRECTED FOR 5 METER SHIP DRAFT, 16 beams, 12.158 kHz, time instrumentation = Hewlett-Packard HP-5065A rubidium frequency standard, NAVI_INSTRUMENTS, Amatec-Straza 2-D doppler speed log, Sperry MK-27 gyro, Trimble GPS receiver, Mod 4000, ITT Transit Satellite receiver Mod 5001
Number of Data Records: 38523
Min/Max Data Record:
Date: 1986 01 01
Latitude: -21.13666
Longitude: -179.03644
Bathymetry, 2- Way Traveltime: 000506
Bathymetry, Corrected Depth: 38.0
Magnetics Total Field, 1st Sensor: 385780
Magnetics Residual Field: -21832
Min/Max Data Record:
Date: 1986 01 27
Latitude: -14.27682
Longitude: -170.60783
Bathymetry, 2- Way Traveltime: 100973
Bathymetry, Corrected Depth: 7705.0
Magnetics Total Field, 1st Sensor: 440320
Magnetics Residual Field: +11102