SigmaSpectra has been compiled for a number of operating systems. Compiled versions can be found under Releases. Windows 32 and 64 bit installers and archives are available, as well as Linux AppImages.

The SigmaSpectra procedure should be referenced to the following paper:

@article{kottke2008,
  title={A semi-automated procedure for selecting and scaling recorded
      earthquake motions for dynamic analysis},
  author={Kottke, Albert and Rathje, Ellen M},
  journal={Earthquake Spectra},
  volume={24},
  number={4},
  pages={911--932},
  year={2008}
}

Now that you have installed SigmaSpectra there are some important aspects of the program you need to be informed about:

1. A complete reference to the program can be found via the program's help menu, or by pressing F1. The documentation can also be found in PDF form in the program's installation path and provided here.

2. SigmaSpectra does not calculate a target acceleration-response spectrum. The target acceleration-response spectrum must calculated externally and then input into the program by copying and pasting from a spreadsheet, or manually entering values. When copying and pasting from a spreadsheet the rows are automatically adding to fit the data.

3. SigmaSpectra requires that the time series in the motion library follow the PEER Ground Motion Database format with respect to both header information and file naming convention. The file naming convention is '/.AT2'. SigmaSpectra requires that the station and component portions of the name be retained as they are used to distinguish components from a given station.