ECEN 5254 Remote Sensing Signals and Systems Professor Albin J. Gasiewski Lecture #26 – April 19, 2012 ECOT 246 303-492-9688 (O) [email protected] Classes: ECCS 1B14 TR 9:30-10:45 AM 1 ECEN 5254 Remote Sensing Signals & Systems Spring 2012 University of Colorado at Boulder Administration • Reading: – RSSS slides – Rogers, Ch 10, on D2L • Final Exam – Saturday May 5, 7:30-10:00 PM in ECCS 1B14 • Term Papers: – Due Friday May 4, COB • Term Paper Presentations: – Friday May 4 – 20 minutes each (17 min + 3 min Q&A) – Schedule to be forwarded 2 ECEN 5254 Remote Sensing Signals & Systems Spring 2012 University of Colorado at Boulder Last Lecture • Tracking radar • Coherent & incoherent scattering • Weather radar & Mie scattering • Dielectric properties of water 3 ECEN 5254 Remote Sensing Signals & Systems Spring 2012 University of Colorado at Boulder Today’s Lecture • Pulse pair Doppler processing • Surface scattering & scatterometry • Rough surface scattering • Doppler beam sharpening • SLAR • Planetary radar • Synthetic aperture radar • Unfocused SAR • Focused SAR 4 ECEN 5254 Remote Sensing Signals & Systems Spring 2012 University of Colorado at Boulder Weather Radar Example: NEXRAD 5 NOAA NEXRAD (WSR-88D) 6 Denver NEXRAD showing 4/10/08 snowstorm across plains 7 Denver NEXRAD showing 4/10/08 radial velocity of snowstorm across plains 8 Denver NEXRAD 4/10/08, close-in range gates Surface clutter and resolution cell size variation seen near radar Beam elevation walk makes radar more sensitive to low-level precipitation close to radar 9 NEXRAD Coverage 10