Implementation of Adaptive-Bayesian DStoch technique for obtaining winds from MST radar covering higher altitudes
| Autor: | Manas Ranjan Padhy, Srinivasan Vigneshwari, M. Venkat Ratnam |
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| Jazyk: | angličtina |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Heliyon, Vol 10, Iss 4, Pp e26316- (2024) |
| Druh dokumentu: | article |
| ISSN: | 2405-8440 53836499 |
| DOI: | 10.1016/j.heliyon.2024.e26316 |
| Popis: | It is challenging to estimate winds accurately from higher altitudes using VHF-MST radar. The current study introduces the Adaptive-Bayesian Deterministic Stochastics Technique (ADStoch), which implements an Empirical Bayesian 1D prediction method using stochastics to analyze radar signals. A new and robust estimator for empirical wavelet shrinkage with Gaussian prior of the nonzero mean for wavelet coefficients is presented, which makes the current prior different from other priors. The mean parameters and the prior covariance hyperparameters follow a pseudo maximum likelihood method for computation. Details on the implemented algorithm developed from scratch using C# are also presented. This technique outperforms contemporary techniques discussed in this context that can recover signals buried in noise established based on the analysis of moment and quality. The estimated Wind is cross-validated for accuracy with the observed wind from the GPS radiosonde operated simultaneously. This technique can consistently extract 3D wind that can reach the range of 25.5 km–28.2 km, improving the conventional maximum altitude of 21.2 km in real time for the MST radar. It is concluded that the ADStoch analysis technique can effectively obtain VHF-MST radar signals at significantly higher altitudes, which is helpful in various scientific investigations. |
| Databáze: | Directory of Open Access Journals |
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