Bias in Differential Reflectivity Revealed With a Numerical Model of a Polarimetric Phased Array Antenna

Mirkovic, Djordje; Zrnic, Dusan S.

doi:10.1109/TRS.2023.3305490

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i

Bias in Differential Reflectivity Revealed With a Numerical Model of a Polarimetric Phased Array Antenna

2023
By Mirkovic, Djordje ; Zrnic, Dusan S.
Source: IEEE Transactions on Radar Systems, 1, 481-492

[PDF-2.88 MB]

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Journal Title:

IEEE Transactions on Radar Systems
Personal Author:

Mirkovic, Djordje ; Zrnic, Dusan S.

Mirkovic, Djordje ; Zrnic, Dusan S. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CIWRO (Cooperative Institute for Severe and High-Impact Weather Research and Operations) ; NSSL (National Severe Storms Laboratory)

OAR (Oceanic and Atmospheric Research) ; CIWRO (Cooperative Institute for Severe and High-Impact Weather Research and Operations) ; NSSL (National Severe Storms Laboratory) Less -
Description:

An electromagnetic simulation of a large polarimetric phased array radar antenna for weather observation using a full-wave electromagnetic solver is presented. The modeled antenna is part of a Ten Panel Demonstrator (TPD) radar serving as a proof of concept for the Advanced Technology Demonstrator (ATD). The simulations we use to compute copolar and cross-polar patterns at horizontal and vertical polarizations. We present these patterns for beam pointing broadside, in a horizontal principal plane, and out of the principal plane. Then we include these patterns into existing exact and approximate formulas to quantify bias in differential reflectivity and show the difference in bias for a few pointing directions of the antenna beam. We demonstrate the techniques which do not use a full-wave electromagnetic approach and are based on infinite array assumption to generate accurate copolar patterns but fail to replicate the cross-polar patterns. The latter ones are crucial for weather applications because they induce bias in polarimetric variable estimates. Finally, we compare the simulation times needed to model one antenna panel with other commonly used solvers.
Source:

IEEE Transactions on Radar Systems, 1, 481-492
DOI:

https://doi.org/10.1109/TRS.2023.3305490
ISSN:

2832-7357
Format:

PDF
Publisher:

Institute of Electrical and Electronics Engineers (IEEE)
Document Type:

Journal Article
Funding:

Grant no. NA21OAR4320204
License:

https://creativecommons.org/licenses/by/4.0/
Rights Information:

CC BY
Compliance:

Submitted
Main Document Checksum:

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urn:sha256:060cd288127ed70c1c54c206b7a51d0c9a38dc5fb45b22bcbdb4247ace5f8781
Download URL:

https://repository.library.noaa.gov/view/noaa/55504/noaa_55504_DS1.pdf
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Bias in Differential Reflectivity Revealed With a Numerical Model of a Polarimetric Phased Array Antenna

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