Scream can save files in PASSCAL Modified SEG-y 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 ‘.sgy’.
Since SEG-y files do not have any support for discontinuous data, 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.
The byte order used is specified in Recording Options.
Stream Identifiers are placed in the header in the following manner (examples based on StreamID 1234Z2, System ID WO5678):
CHANNEL_NAME= 2 right digits of Stream ID (e.g. Z2)
STATION_NAME= 4 left digits of Stream ID (e.g. 1234)
SENSOR_SERIAL= System ID (e.g. WO5678)
CHANNEL_NUMBER= Z=1, N=2, E=3, M0=4, M1=5, M2=6 etc...
See Also: Recording, GCF format, SAC format, MiniSEED format, SUDs format, GSE format, UFF format, CSS format.