USGS CMG S-1-70-NP Metadata

Magnetics

! Converted to time format with year at start.
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DATA COLLECTION OVERVIEW  (use NGDC GEODAS CD to retrieve data)

MCG Data Collection ID ---         S170NP
Institution Data Collection ID --- CONMCALF
NGDC ID ---                        03020027
Funding ---                        NOAA
Project, Cruise & Leg ---          CALIFORNIA CONTINENTAL MARGIN PROJECT, OPR 
494
Study region ---                   +40.00000,+18.00000,-130.00000,-113.00000
Chief Scientist(s) ---             (unspecified)
Name of vessel ---                 SURVEYOR (surface ship)
Date field data collection started --- 03/17/70     30N 166 W
Date field data collection ended ---   09/15/70     40 N 128 W
Parameters surveyed ---
   Bathymetry:                     surveyed, contained in data file
   Magnetics:                      surveyed, contained in data file
   Gravity:                        surveyed, contained in data file
   High-resolution seismics:       not surveyed
   Deep penetration seismics:      not surveyed
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 ---     02/12/80
Contributing institution ---       NOAA/NOS
Country ---                        USA

Navigation instrumentation ---     SATELLITE,R-R DECCA LAMBDA, LORAC B
Position determination method ---  06

Bathymetry instrumentation ---            (unspecified)
Additional forms of bathymetric data ---  (unspecified)
General rate of bathymetry in file ---    2.8 minutes
General collection rate of bathymetry --- (unspecified)
Assumed sound velocity ---                (unspecified)
Bathymetric datum code ---                No correction applied (sea level)
Bathmetry interpolation scheme ---        (unspecified)

Magnetics instrumentation ---            VARIAN V-4937, RAYTHEON DE 723 FATH
Additional forms of magnetics data ---   ANALOG RECORDS, PUNCHED CARDS
General rate of magnetics in file ---    5.0 minutes
General collection rate of magnetics --- 60 seconds
Magnetic sensor tow distance ---         280 meters
Magnetic sensor depth ---                (unspecified)
Two sensor horizontal separation ---     (unspecified)
Residual magnetics reference field ---   IGRF-70
Method of applying residual field ---    5-MIN INTERV. TAKEN ALONG DISTINCT LINE 
SEGS

Gravity instrumentation ---            BELL BGM-2 METER, LACOSTE-ROMBERG S-51
Additional forms of gravity data ---   (unspecified)
General rate of gravity in file ---    4.0 minutes
General collection rate of gravity --- (unspecified)
Theoretical gravity formula ---        (unspecified)
Reference system ---                   (unspecified)
Corrections applied ---                (unspecified)
Starting land tie ---                  (unspecified)
Ending land tie   ---                  (unspecified)

Notes ---
06- GENERAL INSTRUMENTS NARROW BEAM/ RAYTHEON DE 723
WARNING: MGD77 DATA RECORDS FOR THIS CRUISE MAY CONTAIN NEGATIVE GRAVITY
ANOMALY VALUES THAT SHOULD BE POSITIVE.