Affiliation:
1. College of Meteorology and Oceanography National University of Defense Technology Changsha China
2. Key Laboratory of High Impact Weather (Special), China Meteorological Administration Changsha China
Abstract
AbstractSub6 GHz non‐line‐of‐sight signals are a potential opportunistic source of rainfall information that promises to improve the current urgent need regarding near‐surface rainfall detection, but the complex mechanisms in which these signals are impacted by rainfall have hindered further development in this area. In this study, we focus on four types of microwave propagation processes to explore the theoretical basis for Sub6 GHz signal sensitivity to rainfall. We also investigate how these signals change during rainy conditions using a cellphone signal recording experiment. The results demonstrate that the indirect effect of rainfall‐induced changes in the interfacial water film may significantly affect the Sub6 GHz signal, making it an opportunity to reflect rainfall information. Finally, we offer a comprehensive overview of the potential challenges, benefits, and drawbacks of low‐frequency non‐line‐of‐sight links in the context of rainfall inversion.
Funder
National Natural Science Foundation of China
Publisher
American Geophysical Union (AGU)