Provided by: sac2mseed_1.12+ds1-3_amd64 
NAME
sac2mseed - SAC to miniSEED converter
SYNOPSIS
sac2mseed [options] file1 [file2 file3 ...]
DESCRIPTION
sac2mseed converts SAC waveform data to miniSEED format. By default the format of the
input files is automatically detected: alpha or binary (byte order autodetected). The
format can also be forced with the -f option. If an input file name is prefixed with an
'@' character the file is assumed to contain a list of input data files, see LIST FILES
below.
If the input file name ends in ".sac" (not case sensitive) the default output file name
will be the same with the extension replace with ".mseed". The output data may be re-
directed to a single file or stdout using the -o option.
OPTIONS
-V Print program version and exit.
-h Print program usage and exit.
-v Be more verbose. This flag can be used multiple times ("-v -v" or "-vv") for more
verbosity.
-S Include SEED blockette 100 in each output record with the sample rate in floating
point format. The basic format for storing sample rates in SEED data records is a
rational approximation (numerator/denominator). Precision will be lost if a given
sample rate cannot be well approximated. This option should be used in those
cases.
-n netcode
Specify the SEED network code to use, if not specified the network code will be the
value of the KNETWK variable in the SAC header, if KNETWK is not specified the
network code will be blank. It is highly recommended to specify a network code if
no network is defined in the SAC file.
-s stacode
Specify the SEED station code to use, if not specified the station code will be the
value of the KSTNM variable in the SAC header, if KSTNM is not specified the
location ID will be blank.
-l locid
Specify the SEED location ID to use, if not specified the location ID will be the
value of the KHOLE variable in the SAC header, if KHOLE is not specified the
location ID will be blank.
-c chancodes
Specify the SEED channel codes to use, if not specified the channel code will be
the value of the KCMPNM variable in the SAC header, if KCMPNM is not specified the
location ID will be blank. As a special case a dot (.) will be interpreted as the
same character as the input channel name, for example, "L.." can be specified to
only replace the first code with 'L' and leave the other two codes as they are.
-r bytes
Specify the miniSEED record length in bytes, default is 4096.
-e encoding
Specify the miniSEED data encoding format, default is 11 (Steim-2 compression).
Other supported encoding formats include 10 (Steim-1 compression), 1 (16-bit
integers) and 3 (32-bit integers). The 16-bit integers encoding should only be
used if all data samples can be represented in 16 bits.
-b byteorder
Specify the miniSEED byte order, default is 1 (big-endian or most significant byte
first). The other option is 0 (little-endian or least significant byte first). It
is highly recommended to always create big-endian SEED.
-o outfile
Write all miniSEED records to outfile, if outfile is a single dash (-) then all
miniSEED output will go to stdout. All diagnostic output from the program is
written to stderr and should never get mixed with data going to stdout.
-m metafile
For each input SAC file write a one-line summary of channel metadata metafile. The
one-line summary is a comma-separated list containing: network, station, location,
channel, latitude, longitude, elevation, depth, azimuth, incidence, instrument
name, scale factor, sampling rate and start and end times. In SAC the component
azimuth is in degrees clockwise from north, the component incident angle is in
degrees from vertical and the elevation and depth are both in meters.
-me When writing out a metadata file include the event name (kevnm) and user strings 0,
1 and 2 (kuser0, kuser1 and kuser2).
-s factor
When writing data to an integer (miniSEED) encoding format apply this scaling
factor to each input floating point data sample before truncating to an integer.
By default autoscaling is used and a scaling factor is determined that will scale
the maximum sample value to a minimum of 6 digits. If none of the input sample
values include fractional components the scaling factor will be 1 and the floating
point data will simply be truncated to their integer components.
-f format
By default the format of each input file is autodetected, either alpha or binary
(little or big endian byte order autodetected as well). This option forces the
format for every input file:
0 : Autodetect SAC format (default)
1 : Alphanumeric SAC format
2 : Binary SAC format, autodetect byte order
3 : Binary SAC format, little-endian
4 : Binary SAC format, big-endian
SEED LOCATION IDS
The contents of the SAC header variable KHOLE is used as the SEED location ID if it is
set. While the definition of KHOLE and SEED location ID are not officially the same, this
is a known convention when converting between these two formats.
LIST FILES
If an input file is prefixed with an '@' character the file is assumed to contain a list
of file for input. Multiple list files can be combined with multiple input files on the
command line. The last, space separated field on each line is assumed to be the file name
to be read.
An example of a simple text list:
TA.ELFS..LHE.SAC
TA.ELFS..LHN.SAC
TA.ELFS..LHZ.SAC
ABOUT SAC
Seismic Analysis Code (SAC) is a general purpose interactive program designed for the
study of sequential signals, especially timeseries data. Originally developed at the
Lawrence Livermore National Laboratory the SAC software package is also available from
IRIS.
AUTHOR
Chad Trabant
IRIS Data Management Center
2017/04/03 SAC2MSEED(1)