SUDs File Format

SUDs File Format

Scream can save files in SUDs format. See Recording Options.

Files are recorded using the parameters specified in the recording options, including fragmentation and directory. Filenames are created using the same date-coding system as ‘.gcf’ files, but use the extension ‘.sud’.

Files are generated with STATIONCOMP and DESCRIPTRACE header structures.

If a discontinuity is detected in the data stream, then the file will be closed, and a new file opened with a filename timestamp matching the start of the new file. Note that this operation overrides the fragmentation (size or duration) specified in the setup.

Normal Filestamping will resume on the next fragmentation time/size interval. E.g. If 1 hour files are specified, then a new file will be opened on the hour, every hour, whether or not a discontinuity during the previous hour caused a new file to be opened.

Stream Identifiers are placed in the header in the following manner (examples based on StreamID 1234Z2, System ID WO5678):

sc_name.network= last 3 digits of System ID (e.g. 678)
sc_name.st_name= 4 left digits of Stream ID (e.g. 1234)
sc_name.component= ‘v’ for Z, ‘n’ for N, ‘e’ for E, and ‘m’ for Mux streams.
dt_name= sc_name

See Also: Recording, GCF format, SAC format, MiniSEED format, P-SEGy format, GSE format, UFF format, CSS format.