Improving Spaceborne GNSS-R Algal Bloom Detection with Meteorological Data

نویسندگان

چکیده

Algal bloom has become a serious environmental problem caused by the overgrowth of plankton in many waterbodies, and effective remote sensing methods for monitoring it are urgently needed. Global navigation satellite system-reflectometry (GNSS-R) been developed rapidly recent years, which offers new perspective on algal detection. When emerges, water surface will turn smoother, can be detected GNSS-R. In addition, meteorological parameters, such as temperature, wind speed solar radiation, generally regarded key factors formation bloom. this article, detection method aided machine learning auxiliary data is established. This work employs Cyclone GNSS (CYGNSS) fifth generation European Reanalysis (ERA-5) with application random under sampling boost (RUSBoost) algorithm. Experiments were carried out Taihu Lake, China, over period August 2018 to May 2022. During evaluation stage, test true positive rate (TPR) 81.9%, negative (TNR) 82.9%, overall accuracy (OA) 82.9% area (receiver operating characteristic) curve (AUC) 0.88 achieved, all GNSS-R observables being involved. Meanwhile, contribution each factor error sources assessed, results indicate that temperature radiation play prominent role among other research. demonstrates capability CYGNSS an tool inclusion further enhanced performance.

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ژورنال

عنوان ژورنال: Remote Sensing

سال: 2023

ISSN: ['2315-4632', '2315-4675']

DOI: https://doi.org/10.3390/rs15123122