INSTRUCTORS:
Zhang, Guifu
Professor, Sam K. Viersen Presidential ProfessorMETR/ECE 6613: Weather Radar Polarimetry Prereq.: Graduate status
Class: Mon.-Wed.-Fri. 2:00pm-2:50am, NWC5930,
Office hours: Mon. 3:00pm-4:00pm & Fri. 3:00pm-5:00pm, NWC4620, Instructor: Guifu Zhang (guzhang1@ou.edu), (405)325-3507
Text: G. Zhang: Weather Radar Polarimetry, CRC press, 2016 References:
- J. Doviak and D. S. Zrnic: Doppler Radar and Weather Observations, 2006, 1993, 1984
- Ishimaru: Wave Propagation and Scattering in Random Media, 1997, 1978
- N. Bringi and V. Chandrasekar: Polarimetric Doppler Weather Radar: Principle and applications, 2001
Course description
This course provides fundamentals and principles for polarimetric radar remote sensing through understanding wave scattering and propagation in clouds and precipitation filled with hydrometers and other objects. Physical, statistical and electromagnetic properties of the hydrometeors are characterized, and typical polarimetric radar signatures for a variety of weather events are described. The relations between radar observables and physical state parameters will be established. Advanced remote sensing techniques (e.g., polarimetric phased array radar) and retrieval methods for physical parameters will be introduced. Applications of polarimetric radar measurements in hydrometer classification, particle size distribution retrievals, microphysical parameterization, weather quantification and forecast will be illustrated.
Course Content
Chapter 1: Introduction
Historical development; objectives and organization of the book
Chapter 2: Characterization of Hydrometeors
Physical, statistical, and electromagnetic properties
Chapter 3: Wave Scattering by a Single Particle
Wave and electromagnetic wave; scattering fundamentals; Rayleigh scattering; Mie scattering theory; scattering calculations by a non-spherical particle; scattering for arbitrary orientations
Chapter 4: Scattering and Propagation in Cloud and Precipitation
Scattering models; single scattering model; coherent wave propagation; propagation- included scattering
Chapter 5: Radar Measurements and Improvement of Data Quality
Polarimetric weather radar system, equation and signal processing; regular estimation of polarimetric radar variables; multi-lag correlation estimators; clutter detection and mitigation
Chapter 6: Applications in Weather Observation and Quantification
Observation of polarimetric radar signatures; hydrometeor classification; quantitative precipitation estimation (QPE); drop size distribution retrieval; attenuation correction
Chapter 7: Advanced Methods and Optimal Retrievals
Simultaneous attenuation correction and DSD retrieval; statistical retrieval of rain DSDs; variational retrieval; optimal retrieval through data assimilation (DA)
Chapter 8: Phased Array Radar Polarimetry
Background and challenges; planar polarimetric phased array radar; cylindrical polarimetric phased array radar
Grading Homeworks 30%
Projects 30%
Final 40%