Bronwyn Dolman & Ian Reid (ATRAD Pty Ltd & Adelaide University, Australien) werden auf unserem IAP-Kolloquium einen Vortrag zum Thema "Windowed radar time series analysis" halten.

Zusammenfassung:

Radar signal processing in its simplest form involves collecting a time series of finite length, and analysing that data in an appropriate manner typically involving a Fourier transform.  Additional information can be gained by segmenting a time series into smaller windows, analysing those windows individually to then stitch back together for a complete picture.  Examples along this theme include MicroDoppler analysis, employing short-time Fourier transforms to examine the variation in the more transient frequencies returned from a target.  This analysis is particularly useful in differentiating between targets which may produce similar spectra, or where small changes in velocity are important.  

Another example is in detecting targets such as a meteor head echoes, where the target appears to the radar to have accelerated through the beam.  This target acceleration from can be corrected through techniques such as fractional Fourier transforms, or multiplication by a de-chirping factor in an appropriately sized window.  A similar technique can be used to detect satellites, which then allows existing non-purpose built radars to provide some utility in space domain awareness.

We will present an overview of various case studies and signal processing techniques, with a theme on extra information gains from segmented time series analysis.  Examples will include microDoppler analysis of microbats, detection of meteor head echoes and fireballs, and satellite detections.