Graduate Exam Abstract
December 4, 2006, 1pm-3pm
Military Science 115
PARAMETRIC TIME DOMAIN ANALYSIS FOR DUAL-POLARIZATION RADAR SIGNALS
Abstract: A parametric time domain method (PTDM) for clutter mitigation and precipitation estimation for dual-polarized weather radars is presented. Use of PTDM allows simultaneously estimating clutter and precipitation echoes. This approach leads to accurate estimates of precipitation spectral moments in presence of clutter. It is shown, on the example of staggered pulse repetition times (PRTs) observations, that this method can successfully be applied to non-uniformly sampled radar observations. An algorithm to obtain dual-polarization variables from dual-polarization radar signals is also developed.
The performance of PTDM is evaluated using simulations of radar signals, as well as via application to radar observations. Special attention is paid to the cases of strong clutter contamination. The results show that for both uniform and non-uniform sampling the PTDM shows promise for clutter suppression. A comparison to Gaussian Model Adaptive Processing (GMAP), the state of the art clutter filtering technique, is made. Furthermore both methods are compared using CSU-CHILL and Collaborative Adaptive Sensing of the Atmosphere Integrative Project 1 (CASA IP-1) radar observations.
Adviser: Chandrasekar, V
Non-ECE Member: Mielke, Paul W (Statistics )
Member 3: Bringi, Viswanathan N
Program of Study: