GPS-derived PWV for rainfall nowcasting in tropical region
In this paper, a simple algorithm is proposed to perform the nowcasting of rainfall in the tropical region. The algorithm applies global positioning system-derived precipitable water vapor (PWV) values and its second derivative for the short-term prediction of rainfall. The proposed algorithm incorp...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/142253 |
| _version_ | 1811688207986720768 |
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| author | Manandhar, Shilpa Lee, Yee Hui Meng, Yu Song Yuan, Feng Ong, Jin Teong |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Manandhar, Shilpa Lee, Yee Hui Meng, Yu Song Yuan, Feng Ong, Jin Teong |
| author_sort | Manandhar, Shilpa |
| collection | NTU |
| description | In this paper, a simple algorithm is proposed to perform the nowcasting of rainfall in the tropical region. The algorithm applies global positioning system-derived precipitable water vapor (PWV) values and its second derivative for the short-term prediction of rainfall. The proposed algorithm incorporates the seasonal dependency of PWV values for the prediction of a rain event in the coming 5 min based on the past 30 min of PWV data. This proposed algorithm is based on the statistical study of four-year PWV and rainfall data from a station in Singapore and is validated using two-year independent data for the same station. The results show that the algorithm can achieve an average true detection rate and a false alarm rate of 87.7% and 38.6%, respectively. To analyze the applicability of the proposed algorithm, further validations are done using one-year data from one independent station from Singapore and two-year data from one station from Brazil. It is shown that the proposed algorithm performs well for both the independent stations. For the station from Brazil, the average true detection and false alarm rates are around 84.7% and 37%, respectively. All these observations suggest that the proposed algorithm is reliable and works well with a good detection rate. |
| first_indexed | 2024-10-01T05:28:33Z |
| format | Journal Article |
| id | ntu-10356/142253 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:28:33Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1422532020-06-18T01:45:44Z GPS-derived PWV for rainfall nowcasting in tropical region Manandhar, Shilpa Lee, Yee Hui Meng, Yu Song Yuan, Feng Ong, Jin Teong School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering Global Positioning System Precipitable Water Vapor In this paper, a simple algorithm is proposed to perform the nowcasting of rainfall in the tropical region. The algorithm applies global positioning system-derived precipitable water vapor (PWV) values and its second derivative for the short-term prediction of rainfall. The proposed algorithm incorporates the seasonal dependency of PWV values for the prediction of a rain event in the coming 5 min based on the past 30 min of PWV data. This proposed algorithm is based on the statistical study of four-year PWV and rainfall data from a station in Singapore and is validated using two-year independent data for the same station. The results show that the algorithm can achieve an average true detection rate and a false alarm rate of 87.7% and 38.6%, respectively. To analyze the applicability of the proposed algorithm, further validations are done using one-year data from one independent station from Singapore and two-year data from one station from Brazil. It is shown that the proposed algorithm performs well for both the independent stations. For the station from Brazil, the average true detection and false alarm rates are around 84.7% and 37%, respectively. All these observations suggest that the proposed algorithm is reliable and works well with a good detection rate. 2020-06-18T01:45:44Z 2020-06-18T01:45:44Z 2018 Journal Article Manandhar, S., Lee, Y. H., Meng, Y. S., Yuan, F., & Ong, J. T. (2018). GPS-derived PWV for rainfall nowcasting in tropical region. IEEE Transactions on Geoscience and Remote Sensing, 56(8), 4835 - 4844. doi:10.1109/TGRS.2018.2839899 0196-2892 https://hdl.handle.net/10356/142253 10.1109/TGRS.2018.2839899 2-s2.0-85048632578 8 56 4835 4844 en IEEE Transactions on Geoscience and Remote Sensing © 2018 IEEE. All rights reserved. |
| spellingShingle | Engineering::Electrical and electronic engineering Global Positioning System Precipitable Water Vapor Manandhar, Shilpa Lee, Yee Hui Meng, Yu Song Yuan, Feng Ong, Jin Teong GPS-derived PWV for rainfall nowcasting in tropical region |
| title | GPS-derived PWV for rainfall nowcasting in tropical region |
| title_full | GPS-derived PWV for rainfall nowcasting in tropical region |
| title_fullStr | GPS-derived PWV for rainfall nowcasting in tropical region |
| title_full_unstemmed | GPS-derived PWV for rainfall nowcasting in tropical region |
| title_short | GPS-derived PWV for rainfall nowcasting in tropical region |
| title_sort | gps derived pwv for rainfall nowcasting in tropical region |
| topic | Engineering::Electrical and electronic engineering Global Positioning System Precipitable Water Vapor |
| url | https://hdl.handle.net/10356/142253 |
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