The Filebased Parameterizer functions as an off-line complement to the Wideband and Very Wideband Parameterizers, allowing analysts to review and parameterize previously collected data. The Filebased Parameterizer employs extremely sensitive signal detection and estimation techniques to achieve performance close to its theoretical limit, including: multi-rate digital filtering, Kalman filtering, maximum likelihood estimation, phase processing, least squares, and matched-filter detection and estimation. The analysis tool shown above is one of the many ISA-authored tools bundled with this product.