Comments:
S0611MB File s-06-11-mb.220_060 contains mag total, regional,
residual merged with GPS navigation. Navigation refers to
the magnetic sensor (fish layback was applied in real-time).
Times are UTC - having been converted from the PDT times in
the source, s-06-11-mb.mag.csv.zip.
This file should never be re-processed to recalculate the IGRF
because one will lose the time-variable correction. The more
verbose s-06-11-mb.mag.csv.zip does contain all of the columns
that are of significance.
This file was created from s-06-11-mb.mag.csv.zip published in:
Sliter, R., Johnson, S.Y., Watt, J.T., Scheirer, D.S.,
Allwardt, P. and Triezenberg, P.J., 2013,
High-resolution seismic-reflection and marine-magnetic data
from offshore central California--San Gregorio to Point Sur:
U.S. Geological Survey Open-File Report 2013-1071,
[http://pubs.usgs.gov/of/2013/1071/].
The s-06-11-mb.mag.csv.zip can also be downloaded
from the data table in the report at URL:
http://pubs.usgs.gov/of/2013/1071/data_tables.html.