Guralp Systems Scream - Manual (Page 108)

Scream! 4.5
Data are stored in 4K blocks with Motorola byte order, using Steim-1
compression. If a discontinuity is detected in the incoming data
stream, then the block which is currently being built is written to disk,
and a new block is started with its time-stamp in the header. Files
continue to be created according to the options you have specified for
Granularity.
The MiniSEED headers are formed to comply with the FSDN SEED
naming conventions:
•
The instrument's serial number is used as the MiniSEED Station
ID.
•
Streams with sample rates ≥ 80 samples/s use H as the band
code (first character) in the Channel ID.
•
Streams with sample rates between 10 and 50 samples/s use B
as the band code in the Channel ID.
•
Streams with sample rates between 2 and 8 samples/s use M as
the band code in the Channel ID.
•
Streams with sample rates of 1 sample/s use L as the band code
in the Channel ID.
•
All streams use H as the instrument code (second character) in
the Channel ID.
•
Streams ending in Zn, Nn, and En use Z, N, and E respectively as
the orientation code (third character) in the Channel ID.
You can also define your own SEED names for streams in Scream's
scream.ini file. To do this, add a line to the end of the file reading
[ExportInfo]
After this line, list channels you want to map, one per line, in the
format
SYSTID-STREAM=sta:SSS chan:CCC net:NN loc:LL
or
SYSTID-SERN=sta:SSS net:NN loc:LL
or
SYSTID=net:NN loc:LL
108 Issue K