PySAC

General information about PySAC

PySAC is a Python interface to the Seismic Analysis Code (SAC) file format, supporting little and big-endian binary and alphanumeric format, containing evenly-sampled time-series data.

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PySAC emphasizes intuitive header access, header consistency, and ObsPy support.

Features

1. Read and write SAC binary or ASCII
   • autodetect or specify expected byteorder
   • optional file size checking and/or header consistency checks
   • header-only reading and writing
   • “overwrite OK” checking (‘lovrok’ header)
2. Convenient access and manipulation of relative and absolute time headers
3. User-friendly header printing/viewing
4. Fast access to header values from attributes
   • With type checking, null handling, and enumerated value checking
5. With type checking, null handling, and enumerated value checking
   • Conversion from ObsPy Trace to SAC trace retains detected previous SAC header values.
   • Conversion to ObsPy Trace retains the complete SAC header.