rsac {Rsac}R Documentation

Read a SAC file

Description

This function reads the header information and data of a SAC binary file into a list.

Usage

  rsac(files, endian = .Platform$endian)

Arguments

files name of file to be read.
endian the endian-ness of the file. See readBin.

Value

an object of class "rsac", which is a list containing the following elements:

amp data.
dt Increment between evenly spaced samples (nominal value).
depmin Minimum value of dependent variable.
depmax Maximum value of dependent variable.
scale Multiplying scale factor for dependent variable.
odelta Observed increment if different from nominal value.
b Beginning value of the independent variable.
e Ending value of the independent variable.
o Event origin time (seconds relative to reference time.
a First arrival time, seconds relative to reference time.
f End of event time.
stla Station latitude (degrees, north positive).
stlo Station longitude (degrees, east positive).
stel Station elevation (meters).
stdp Station depth below surface (meters).
evla Event latitude (degrees, north positive).
evlo Event longitude (degrees, east positive).
evel Event elevation (meters).
evdp Event depth below surface (meters).
mag Event magnitude.
dist Station to event distance (km).
az Event to station azimuth (degrees).
baz Station to event azimuth (degrees).
gcarc Station to event great circle arc length (degrees).
cmpaz Component azimuth (degrees clockwise from north).
cmpinc Component incident angle (degrees from vertical).
nzyear GMT year corresponding to reference (zero) time in file.
nzjday GMT julian day.
nzhour GMT hour.
nzmin GMT minute.
nzsec GMT second.
nzmsec GMT millisecond.
norid Origin ID.
nevid Event ID.
N Number of points in time series.
units Type of dependent variable (IUNKN=Unknown; IDISP=Displacement in nm; IVEL=Velocity in nm/sec; IVOLTS=Velocity in volts; IACC=Acceleration in nm/sec/sec).
iztype Reference time equivalence (IUNKN=Unknown; IB=Begin time; IDAY=Midnight of refernece GMT day; IO=Event origin time; IA=First arrival time; ITn=User defined time pick n, n=0,9).
leven TRUE if data is evenly spaced.
lpspol TRUE if station components have a positive polarity (left-hand rule).
sta Station name.
kevnm Event name.
khole Hole identification if nuclear event.
ko Event origin time identification.
ka First arrival time identification.
comp Component name.
knetwork Name of seismic network.
kinst Generic name of recording instrument.

Author(s)

Eric M. Thompson <eric.thompson@tufts.edu>

References

http://www.llnl.gov/sac/


[Package Rsac version 0.1-7 Index]