# scart — SeisComP Release documentation

6.9.0

# scart

Import/export MiniSEED data to/from SDS archives.

## Description

The archive tool scart reads and writes SDS archives and files in miniSEED format and checks miniSEED archives or prints stream information.

- Dump mode: Create miniSEED files (multiplexed), e.g. for playbacks, from SDS structured data (e.g. created by slarchive).

- Dump mode: Play back records directly out of an SDS structure.

- Import mode: Import multiplexed miniSEED files into a local SDS waveform archive.

- Import mode: Import data using the RecordStream interface into a local SDS waveform archive.

- Import mode: Read data from any RecordStream interface and dump it to file.

- Check mode: Check an archive of miniSEED files for out-of-order records in files.

Warning

- When creating SDS archives, scart simply appends the new records to existing ones. Multiple imports of the same data result in duplication.

- Out-of-order imports of waveforms into a SDS archive result in out-of-order records which may not be processed. Clean your archive using scmssort.

- Before importing miniSEED data into an SDS archive they must be sorted by time and duplicate records must be removed. Otherwise, the SDS archive may not be correctly readable by other modules. Therefore, combine scart with scmssort for multiplexing and removal of duplicates.

Hint

In dump and import mode output streams may be filtered by

- Time windows (`-t`),

- Network-station-location-channel (NSLC) lists (`--nslc`) created, e.g., with

  - scinv from inventories,

  - scdumpcfg from bindings configuration,

  - scart itself from other miniSEED files or achives.

In dump mode output streams may also be filtered by

- Time window - stream lists (`--list`, dump mode) generated by scevtstreams for particular events.

Time strings may be given in * ISO time format, e.g., 2023-03-28T15:48:00 * or the ‘old’ SeisComP time format with empty character between date and time, e.g., ‘2023-03-28 15:48:00’.

When omitting seconds, minutes or hours values of zero are implied.

## Configuration

scart can make use of RecordStream implementations which are provided by additional plugins. For loading additional plugins, e.g. the xyz plugin create and configure `scart.cfg`:

    plugins = xyz

## Examples

Hint

The usage of wildcards in place of network, station, location or channel code is allowed in many options (`-n`, `-c`, `-l`, `--list`, `--nslc`) and follows these rules:

- Import mode: the wildcards are passed to the RecordStream interface, that interprets them. Normally both “*” and “?” are supported by RecordStreams.

- Dump mode: the wildcards are interpreted by scart command that supports “*” for network, station, location codes and “*”, “?”, “(”, “)”, “|” for channel code.

1. Extract data from the default SDS archive in `$SEISCOMP_ROOT/var/lib/archive` or from a local SDS archive [SDS archive] into a miniSEED file `file.mseed` and sort by end time of the records:

       scart -dsvE -t '[start-time]~[end-time]' [SDS archive] > [file.mseed]
       scart -dsvE -t '[start-time]~[end-time]' > file.mseed
       scart -dsvE -t '[start-time]~[end-time]' -n '[NET1],[NET2]' > file.mseed
       scart -dsvE -t '[start-time]~[end-time]' -n '[NET]' -c '(E,H)H(1,2,3)' > file.mseed
       scart -dsvE -t '[start-time]~[end-time]' -n '[N1.S1.L1.C1],[N2.S2.L2.C2]' > file.mseed
       scart -dsvE -t '[start-time]~[end-time]' --nslc list.file > file.mseed
       scart -dsvE -t --list list.file > file.mseed

   It is possible to achieve the same result of the dump mode using a combination of the input mode and the scmssort command, which allows to read the input data from any supported RecordStream, not only an SDS archive:

       scart -I [record-stream] --list list.file --stdout | scmssort -u -E -v > file.mseed

   Note

   Sorting data is computational expensive but required for waveform playbacks.

2. Push miniSEED data from file `file.mseed` or standard input (stdin) into a local SDS archive or a file. Additionally, you may check if the records of archived files are correctly ordered, filter by time and/or with NSLC list and print the output streams:

       scmssort -u -E [file.mseed] > sorted.mseed
       scart -I sorted.mseed --with-filecheck [SDS archive]

       scart -I [file.mseed] -t '[start-time]~[end-time]' --print-streams --nslc list.file -o [out.mseed]

       cat sorted.mseed | scart -I - [SDS archive]
       cat sorted.mseed | scart [SDS archive]

3. Collect data using the RecordStream interface (e.g. FDSNWS server) and write to a miniSEED file or import it into a local SDS archive. The data streams and the time spans can be defined in several ways. The data streams (`--list`) can be automatically generated, e.g., by scevtstreams.

       scart -I fdsnws://[server]:80 --list list.file [SDS archive]
       scart -I fdsnws://[server]:80 --list list.file -o file.mseed
       scart -I fdsnws://[server]:80 -t '[start-time]~[end-time]' --nslc list.file [SDS archive]
       scart -I fdsnws://[server]:80 -t '[start-time]~[end-time]' -n '[NET1],[NET2]' [SDS archive]
       scart -I fdsnws://[server]:80 -t '[start-time]~[end-time]' -n '[NET]' -c 'EH?' [SDS archive]
       scart -I fdsnws://[server]:80 -t '[start-time]~[end-time]' -n '[N1.S1.L1.C1],[N2.S2.L2.C2]' [SDS archive]

4. Check all files of an SDS archive or other directory structure for miniSEED files with out-of-order records:

       scart --check [archive]

5. Print stream information from miniSEED files in archives or from RecordStream without actually writing miniSEED data. In dump and import mode use the `--test` if miniSEED data shall be read but not written.

       scart --print-streams -I [miniSEED file] --test
       scart --print-streams -d -t [time span] --test [SDS archive]
       scart --print-streams --check [archive]

   The output looks like this:

       # streamID       start                       end                         records samples samplingRate
       GE.RGN..BHZ      2022-12-08T15:34:41.895Z    2022-12-08T15:52:19.145Z    58 21145 20.0

   where the header and the text body are printed to stderr.

## Command-Line Options

scart [options] {archive-dir}

The last option has to be the archive directory when dump mode is enabled. When no archive directory is explicitly given, $SEISCOMP_ROOT/var/lib/archive or the current directory is used depending on whether $SEISCOMP_ROOT has been set or not. The default operation mode is import. That means that a multiplexed MiniSEED file or another record source such as ArcLink is used to import records into a SDS structure.

### Verbosity

-v, --verbose

  Verbose mode.

-h, --help

  Display a help message.

### Mode

--check

  Check mode. Check all files in the given directory for erroneous miniSEED records. All sub-directories are included. If no directory is given, the default SDS archive is scanned. Checks are only complete for files containing exactly one stream. More complete checks are made with scmssort.

-d, --dump

  Set export (dump) mode. Records are retrieved from an archive and written to standard output.

-I

  Import mode (default): Specify the recordstream URL to read the data from for archiving. When using any other recordstream than file, a stream list file is needed. Specifying - implies file://- (stdin). If no mode is explicitly specified, -I file://- is assumed.

### Processing

-c channels

  Channel filter to be applied to the data streams. Default for Dump: "(B|E|H|M|S)(D|H|L|N)(E|F|N|Z|1|2|3)" Default for Import: "*"

-E

  Dump mode: sort records according to their end time. Default: start time.

--files count

  Dump mode: Specify the number of file handles to cache. Default: 100.

-i

  Ignore records without data samples.

-l, --list file

  Import, dump mode: Use a stream list file with time windows instead of defined networks and channels (-n, -c and -t are ignored). The list can be generated from events by scevtstreams. One line per stream. Line format: starttime;endtime;streamID The time format is the same as described in option ‘-t’.

  Example:

  2019-07-17 02:00:00;2019-07-17 02:10:00;GR.CLL..BH?

-m, --modify

  Dump mode: Modify the record time for real time playback. The first record time is NOW. The relative time of successive records to the first one are kept.

-n networks

  Import, dump mode: Data stream selection as a comma separated list "stream1,stream2,streamX" where each stream can be NET or NET.STA or NET.STA.LOC or NET.STA.LOC.CHA. If CHA is omitted, it defaults to the value of -c option. Default: "*"

--nslc file

  Import, dump mode: Stream list file to be used instead of defined networks and channels (-n and -c are ignored) for filtering the data by the given streams. Dump mode: Use in combination with -t! One line per stream, line format: NET.STA.LOC.CHA

  Example:

  GR.CLL..BH?

--rename rule

  Import, dump mode: Rename stream data according to the provided rule(s). A rule is "[match-stream:]rename-stream" and match-stream is optional. match-stream and rename-stream are in the "NET.STA.LOC.CHA" format. match-stream supports special charactes "?" "*" "|" "(" ")". rename-stream supports the special character "-" that can be used in place of NET, STA, LOC, CHA codes with the meaning of not renaming those. "-" can also be used as the last character in CHA code. Multiple rules can be provided as a comma separated list or by providing multiple --rename options.

-s, --sort

  Dump mode: Sort records by [start-]time. To sort records by their end time use -E.

--speed value

  Dump mode: Specify the speed to dump the records. A value of 0 means no delay otherwise speed is a multiplier of the real time difference between the records. When feeding the records directly into the replay pipe a value of 1 (real time) is recommended.

-t, --time-window timeWindow

  Import, dump mode: Specify the time window (as one properly quoted string) to dump records for. Times are UTC and separated by a tilde "~". To dump one hour of waveform data between 2008/01/01 00:00:00 and 2008/01/01 01:00:00 use <-t 2008-01-01T00:00:00~2008-01-01T01:00:00>.

### Output

-o, --output

  Dump, Import mode: Write data to given file instead of creating a SDS archive. Deactivates --stdout. Deactivated by --test.

--print-streams

  Print stream information only and exit. Works in import, dump and check mode. Output: NET.STA.LOC.CHA StartTime EndTime.

--stdout

  Import mode: Write to stdout instead of creating a SDS archive. Deactivated by --test and --output.

--test

  Test input only, deactivate all miniSEED output. This switch is useful for debugging and printing stream information with --print-streams.

--with-filecheck

  Import mode: Check all accessed files. Unsorted or unreadable files are reported to stderr. Checks are only complete for files containing exactly one stream. More complete checks are made with scmssort.

--with-filename

  Import mode: Print all accessed files to stderr after import.