Deep learning-based modeling and prediction of GNSS time series: A comparative analysis of adaptive optimization algorithms
•For the first time in the literature, adaptive learning rate optimization methods are compared on GNSS time series data.•Deep learning methods are proposed for the prediction of GNSS time series data.•10 different deep learning methods and 4 different optimization algorithms were studied.•The best...
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| Published in: | Advances in space research Vol. 76; no. 4; pp. 2086 - 2103 |
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| Main Authors: | , |
| Format: | Journal Article |
| Language: | English |
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Elsevier B.V
15.08.2025
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| ISSN: | 0273-1177 |
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| Abstract | •For the first time in the literature, adaptive learning rate optimization methods are compared on GNSS time series data.•Deep learning methods are proposed for the prediction of GNSS time series data.•10 different deep learning methods and 4 different optimization algorithms were studied.•The best optimization method-deep learning model combination in the study was found to be GRU with Adam optimization.
In this research, optimization algorithms with adaptive learning rates on Global Navigation Satellite System (GNSS) time series data are comparatively investigated. For this purpose, five years of GNSS measurement data obtained from the AGRD station located in the Ağrı province of Türkiye were used and incorrect or missing records were detected for a total of 251 days in the dataset. After the missing data were completed using the linear interpolation method, a total of ten different deep learning methods and four different adaptive optimization algorithms (Adam, Adagrad, RMSprop and AdamW) were used to develop separate prediction models and performance evaluations were performed. When the performance of the best combination, the Adam optimized-GRU model, was evaluated based on Root Mean Square Error (RMSE) values, it was found to be 1.58 mm, 1.36 mm and 3.07 mm for the north, east and up components, respectively. When evaluated according to the Mean Absolute Error (MAE) value, it was found to be 1.20 mm, 1.05 mm, 2.33 mm, respectively. As a result of the comprehensive analyses, it has been revealed that Adam and AdamW algorithms are more effective than the others among the adaptive optimization algorithms examined and the deep learning models optimized with these algorithms exhibit superior prediction performance on GNSS time series data. It is thought that the results obtained from this study will be an important reference on adaptive learning optimization algorithms for future studies in the field of GNSS time series and deep learning and will guide the research on the subject. |
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| AbstractList | •For the first time in the literature, adaptive learning rate optimization methods are compared on GNSS time series data.•Deep learning methods are proposed for the prediction of GNSS time series data.•10 different deep learning methods and 4 different optimization algorithms were studied.•The best optimization method-deep learning model combination in the study was found to be GRU with Adam optimization.
In this research, optimization algorithms with adaptive learning rates on Global Navigation Satellite System (GNSS) time series data are comparatively investigated. For this purpose, five years of GNSS measurement data obtained from the AGRD station located in the Ağrı province of Türkiye were used and incorrect or missing records were detected for a total of 251 days in the dataset. After the missing data were completed using the linear interpolation method, a total of ten different deep learning methods and four different adaptive optimization algorithms (Adam, Adagrad, RMSprop and AdamW) were used to develop separate prediction models and performance evaluations were performed. When the performance of the best combination, the Adam optimized-GRU model, was evaluated based on Root Mean Square Error (RMSE) values, it was found to be 1.58 mm, 1.36 mm and 3.07 mm for the north, east and up components, respectively. When evaluated according to the Mean Absolute Error (MAE) value, it was found to be 1.20 mm, 1.05 mm, 2.33 mm, respectively. As a result of the comprehensive analyses, it has been revealed that Adam and AdamW algorithms are more effective than the others among the adaptive optimization algorithms examined and the deep learning models optimized with these algorithms exhibit superior prediction performance on GNSS time series data. It is thought that the results obtained from this study will be an important reference on adaptive learning optimization algorithms for future studies in the field of GNSS time series and deep learning and will guide the research on the subject. |
| Author | Tabar, Mehmet Emin Sisman, Yasemin |
| Author_xml | – sequence: 1 givenname: Mehmet Emin orcidid: 0000-0002-3234-5340 surname: Tabar fullname: Tabar, Mehmet Emin email: metabar@beu.edu.tr organization: Bitlis Eren University, Vocational School of Technical Sciences, Bitlis, Türkiye – sequence: 2 givenname: Yasemin orcidid: 0000-0002-6600-0623 surname: Sisman fullname: Sisman, Yasemin organization: Ondokuz Mayis University, Engineering Faculty, Department of Geomatics Engineering, Samsun, Türkiye |
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