Proceedings of the 8th URSI-NG Annual Conference (URSI-NG 2024)

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Computational Analysis of Raindrop Radar Reflectivity and Radar Cross Section across Various Frequency Bands

Authors
T. Y. Ojebisi1, *, J. S. Ojo2, E. O. Olurotimi3, M. O. Ajewole2
1Department of Physics, Bamidele Olumilua University of Education, Science and Technology, Ikere Ekiti , Ekiti State, Nigeria
2Department of Physics, Federal University of Technology, Akure, Ondo State, Nigeria
3Department of Electronic and Computer Engineering, Durban University of Technology, Durban, South Africa
*Corresponding author. Email: temitopekoladeoje@gmail.com
Corresponding Author
T. Y. Ojebisi
Available Online 4 February 2025.
DOI
10.2991/978-94-6463-644-4_12How to use a DOI?
Keywords
raindrop radar reflectivity; radar cross section; frequency bands; computational analysis; meteorology; radar systems
Abstract

This study presents a numerical investigation of radar cross-section (RCS) and radar reflectivity of raindrops using a modified generalized T-matrix method to model realistic non-spheroidal raindrop shapes. The RCS and reflectivity are computed across a range of frequencies for raindrops with radii between 0.25 mm and 4 mm. Results indicate that RCS increases with both raindrop size and frequency when the drop size is smaller than the wavelength. Reflectivity for individual raindrops remains constant for drop radii up to 2 mm, beyond which it gradually increases, reaching a peak at 4 mm. This trend highlights the dependence of reflectivity on raindrop size and shape, especially as drops transition from spherical to oblate forms. At higher frequencies, notably above 60 GHz, the RCS and reflectivity curves exhibit pronounced instability, particularly at 200 GHz, where the wavelength approximates typical raindrop diameters (~1.5 mm). This frequency dependence offers valuable insights into radar system design and application in meteorological forecasting, hydrological modeling, climate studies, and communication system design, where precise rainfall estimation is critical. This theoretical analysis of RCS and reflectivity characteristics thus enhances our understanding of their behavior across frequency ranges and their implications for diverse practical applications.

Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the 8th URSI-NG Annual Conference (URSI-NG 2024)
Series
Advances in Physics Research
Publication Date
4 February 2025
ISBN
978-94-6463-644-4
ISSN
2352-541X
DOI
10.2991/978-94-6463-644-4_12How to use a DOI?
Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - T. Y. Ojebisi
AU  - J. S. Ojo
AU  - E. O. Olurotimi
AU  - M. O. Ajewole
PY  - 2025
DA  - 2025/02/04
TI  - Computational Analysis of Raindrop Radar Reflectivity and Radar Cross Section across Various Frequency Bands
BT  - Proceedings of the 8th URSI-NG Annual Conference (URSI-NG 2024)
PB  - Atlantis Press
SP  - 123
EP  - 130
SN  - 2352-541X
UR  - https://doi.org/10.2991/978-94-6463-644-4_12
DO  - 10.2991/978-94-6463-644-4_12
ID  - Ojebisi2025
ER  -