Define a simple directory and file structure for data files. The SDS provides a basic level of standardization and portability when adapting data servers (AutoDRM, NetDC, etc.), analysis packages (Seismic Handler, SNAP, etc.) and other classes of software that need direct access to data files.
The basic directory and file layout is defined as:
<SDSdir>/Year/NET/STA/CHAN.TYPE/NET.STA.LOC.CHAN.TYPE.YEAR.DAY
SDSdir : arbitrary base directory YEAR : 4 digit year NET : Network code/identifier, up to 8 characters, no spaces STA : Station code/identifier, up to 8 characters, no spaces CHAN : Channel code/identifier, up to 8 characters, no spaces TYPE : 1 characters indicating the data type, recommended types are: 'D' - Waveform data 'E' - Detection data 'L' - Log data 'T' - Timing data 'C' - Calibration data 'R' - Response data 'O' - Opaque data LOC : Location identifier, up to 8 characters, no spaces DAY : 3 digit day of year, padded with zeros
The dots, '.', in the file names must always be present regardless if neighboring fields are empty.
Additional data type flags may be used for extended structure definition.