Survey Identifier: MARA01WT
Format Acronym: MGD77
Data Center File Number: 15040094
Parameters Surveyed Code: 55131
File Creation Date (yyyymmdd): 19811007
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V THOMAS WASHINGTON
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): WILSON R.
Project: MARIANA LEG 1
Survey Departure Date (yyyymmdd): 19780724
Port of Departure: SAN DIEGO
Survey Arrival Date (yyyymmdd): 19780801
Port of Arrival: HONOLULU
Navigation Instrumentation: SATNAV,AUTO LOG GYRO+2D DOPPLER SPD LOG
Geodetic Datum/Position: LINEAR INTERP.BETWEEN ADJACENT FIXES
Bathymetry Instrumentation: 3.5KHZ/RAYTHEON UGR RECORDER/WIDE BEAM
Additional Forms of Bathymetric Data: ANALOGUE RECORDS,PUNCHED CARDS
Magnetics Instrumentation: VARIAN MFD PROTON PRECESSION MOD 4970
Additional Forms of Magnetics Data: ANAL.RECORDS,CARDS
Topmost Latitude of Survey: +33
Bottommost Latitude: +21
Leftmost Longitude: -158
Rightmost Longitude: -117
General Digitizing Rate of Bathymetry: 050
General Sampling Rate of Bathymetry: 1SECONDSWEEP
Assumed Sound Velocity: 14630
Bathymetric Datum Code: 00
Interpolation Scheme: 5 MINUTE INTERVAL
General Digitizing Rate of Magnetics: 050
General Sampling Rate of Magnetics: 06
Reference Field Code: 04
Reference Field: IGRF 1975
Method of Applying Residual Field: LIN. INTERP.POINTS WITHIN ONE DEGREE SQUARE
Number of Data Records: 2360
Min/Max Data Record:
Date: 1978 07 24
Latitude: +21.23650
Longitude: -157.83080
Bathymetry, 2- Way Traveltime: 000750
Bathymetry, Corrected Depth: 56.0
Magnetics Total Field, 1st Sensor: 356150
Magnetics Residual Field: -05440
Min/Max Data Record:
Date: 1978 08 01
Latitude: +32.69330
Longitude: -117.24269
Bathymetry, 2- Way Traveltime: 077375
Bathymetry, Corrected Depth: 5848.0
Magnetics Total Field, 1st Sensor: 490330
Magnetics Residual Field: +03930