Antenna Cross-Polar Requirements for 3-PolD Weather Radar Measurements
| Autor: | Veronica Santalla del Rio, María Vera Isasa, Jose M. Pidre |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Synthetic aperture radar
010504 meteorology & atmospheric sciences Early-warning radar Computer science 0211 other engineering and technologies Polarimetry 02 engineering and technology Radiation 01 natural sciences Passive radar law.invention Radiation pattern symbols.namesake Radar engineering details law Radar imaging Astrophysics::Solar and Stellar Astrophysics Electrical and Electronic Engineering Radar Physics::Atmospheric and Oceanic Physics 021101 geological & geomatics engineering 0105 earth and related environmental sciences Remote sensing Pulse-Doppler radar Astrophysics::Instrumentation and Methods for Astrophysics Side looking airborne radar Continuous-wave radar Bistatic radar symbols 3D radar General Earth and Planetary Sciences Weather radar Antenna (radio) Radar configurations and types Doppler effect |
| Zdroj: | IEEE Transactions on Geoscience and Remote Sensing. 55:2682-2692 |
| ISSN: | 1558-0644 0196-2892 |
| DOI: | 10.1109/tgrs.2017.2651582 |
| Popis: | The analysis and correction of the bias occurring in weather radar polarimetric measurements is a challenging problem. Polarization coupling due to the cross-polar radiation pattern of the radar’s antenna is known to be responsible for errors in the estimation of the polarimetric covariance matrix, and consequently in the hydrometeor classification and quantification, either when using the ATSR or the SHV method. An alternative method for Doppler and polarimetric measurements based on transmitting three different polarizations (3-PolD) has been proven to provide accurate polarimetric covariance matrix estimates without making any hypothesis about the target polarimetric response or its Doppler spectrum. This method does not reduce the Doppler capabilities or the unambiguous range of the radar despite alternately transmitting 3-PolD. These characteristics have encouraged evaluating the polarimetric parameter biases due to cross-polar radiation when this method is used. Biases are calculated considering reflector antenna systems as well as phased-array antenna systems. The results show that this method may guarantee a tolerable bias level even with a poor co- to cross-polar antenna pattern ratio. |
| Databáze: | OpenAIRE |
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