# **about a1das**
**a1das** is a python API to read native Febus-Optics DAS-A1 file. It allows to produce and write reducted file (decimated, transpose, ...), plot seismic DAS section, convert trace to obspy stream, plus a few utilities.
This API is developped at Université Grenoble Alpes (ISTerre). While it benefits from information from Febus-Optics, 
it is not developped by Febus-Optics company.

![a1das API overview](a1das_overview.png "a1das API overview") 

{ref}`core module`: Generic IO functions to open/read/plot _febus_ or _reducted_ or _socket_ files. Definittion of the two classes _A1File_ and _A1Section_ and their respective utilities.

{ref}`reduction module`: Functions for converting from Febus format to hdf5 reducted file

{ref}`extract module`: Functions to extract data within a time window from a multiple file dataset

{ref}`geoutil module`: Functions to manage geographical information in H5 files and interface to QGIS

{ref}`xcor module`: Functions to compute cross-correlations. Optimization with fortran codes using openMP and MKL/openBLAS libraries