| Comments |
NGDC overview:
DATA COLLECTION OVERVIEW (use NGDC GEODAS CD to retrieve data)
MCG Data Collection ID --- V664NP
Institution Data Collection ID --- V2006
NGDC ID --- 01030055
Funding --- (unspecified)
Project, Cruise & Leg --- CRUISE 20, LEG 6
Study region --- +56.00000,+28.00000,+139.00000,-177.00000
Chief Scientist(s) --- W. LUDWIG
Name of vessel --- VEMA (surface ship)
Date field data collection started --- 05/27/64 MIDWAY ISLAND
Date field data collection ended --- 06/23/64 TOKYO, JAPAN
Parameters surveyed ---
Bathymetry: surveyed, contained in data file
Magnetics: surveyed, contained in data file
Gravity: surveyed, contained in data file
High-resolution seismics: surveyed, but not contained in data file
Deep penetration seismics: surveyed, but not contained in data file
Format ---
(I1,A8,F5.2,4I2,F5.3,F8.5,F9.5,I1,F6.4,F6.1,I2,i1,3F6.1,I1,F5.1,F6.0,F7.1,F6.1,F5.1,A8,4I1)
Date of data input to NGDC --- 07/03/89
Contributing institution --- LAMONT-DOHERTY GEOLOGICAL OBSERVATORY
Country --- U.S.A.
Navigation instrumentation --- SEXTANT
Position determination method --- DEAD RECKONING
Bathymetry instrumentation --- (SEE ADD. DOC./18)
Additional forms of bathymetric data --- ANALOG RECORDS
General rate of bathymetry in file --- 6.0 minutes
General collection rate of bathymetry --- ONE SECOND
Assumed sound velocity --- 1463.0 m/sec
Bathymetric datum code --- No correction applied (sea level)
Bathmetry interpolation scheme --- NONE
Magnetics instrumentation --- L-DGO MFG. PROTON-PRECESSION
Additional forms of magnetics data --- ANALOG RECORDS
General rate of magnetics in file --- 6.0 minutes
General collection rate of magnetics --- 6 seconds
Magnetic sensor tow distance --- (unspecified)
Magnetic sensor depth --- (unspecified)
Two sensor horizontal separation --- (unspecified)
Residual magnetics reference field --- IGRF-65
Method of applying residual field --- LINEAR INTERPOLATION BETWEEN NAV. PTS.
Gravity instrumentation --- GRAF-ASKANIA GSS2-12
Additional forms of gravity data --- ANALOG RECORDS
General rate of gravity in file --- 10.0 minutes
General collection rate of gravity --- (unspecified)
Theoretical gravity formula --- International 1930
Reference system --- Potsdam system
Corrections applied --- (unspecified)
Starting land tie --- (unspecified)
Ending land tie --- (unspecified)
Seismic instrumentation --- L-DGO 25CU.IN.AIRGUN, EEL,DRUM RECORDER
Formats of seismic data --- TWO, 2-CHANNEL SHEET RECORDS
Notes ---
06 - 12 KHZ, WIDE BEAM (60 DEG),1 SECOND SWEEP |
