Astro Space Locator (ASL) software package is focused on post-correlation analysis of the data obtained by the aperture synthesis method with Very Long Baseline Interferometry (VLBI including Space-VLBI). The VLBI method of aperture synthesis is based on the visibility function measurements by separated telescopes.

ASL allows the user to perform the operation fringe synthesis and averaging (evaluation of the visibility function), visual editing, one-dimensional signal data processing (for each baseline, frequency and polarization), amplitude calibration, self-calibration for phase and amplitude. This software package allows performing all basic procedures for the image synthesis, including the main solution finding, methods of cleaning and self-calibration, and also allows the user to look at the in-between and final processing results in tabular and graphical form.