Survey Identifier: MRTN01WT
Format Acronym: MGD77
Data Center File Number: 15040123
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): SMITH K.L.
Project: MARATHON LEG 1
Funding: NSF OCE83-17741
Survey Departure Date (yyyymmdd): 19840324
Port of Departure: SAN DIEGO,CALIF.
Survey Arrival Date (yyyymmdd): 19840427
Port of Arrival: HONOLULU,HAWAII
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,DIGITAL TAPE
Gravity Instrumentation: NONE COLLECTED
Additional Forms of Gravity Data: NONE COLLECTED
Seismic Instrumentation: NONE COLLECTED
Formats of Seismic Data: NONE COLLECTED
Topmost Latitude of Survey: +34
Bottommost Latitude: +21
Leftmost Longitude: -160
Rightmost Longitude: -118
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: 88
Reference Field: DGRF 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, 12.158 kHz, 16 beams. EARLY CRUISE WITH NEW COMPUTER SYSTEM (VAX 11/730). MANY GAPS IN LOGGED DATA. WHILE NGDC HAS FULL RESOLUTION MULTIBEAM BATHYMETRY FOR THIS SURVEY, MULTIBEAM, BATHYMETRY IS NOT AVAILABLE FOR THE FOLLOWING DATE/TIMES:, 8403260000 TO 8404060508, 8404140625 TO 8404150800, 840416 TO 840422. NAVI_INSTRU Amatec-Straza 2-D Doppler speed log, Sperry MK-27 Gyro, etc.
Number of Data Records: 22331
Min/Max Data Record:
Date: 1984 03 26
Latitude: +21.97465
Longitude: -159.17576
Bathymetry, 2- Way Traveltime: 011347
Bathymetry, Corrected Depth: 841.0
Magnetics Total Field, 1st Sensor: 393450
Magnetics Residual Field: -03204
Min/Max Data Record:
Date: 1984 04 27
Latitude: +33.28026
Longitude: -118.49946
Bathymetry, 2- Way Traveltime: 084587
Bathymetry, Corrected Depth: 6412.0
Magnetics Total Field, 1st Sensor: 472790
Magnetics Residual Field: +03168