Using the Global Navigation Satellite System-Interferometric Reflectometry (GNSS-IR) technique to detect sea-level changes in Singapore : a feasibility study

The Global Navigation Satellite System-Interferometric Reflectometry (GNSS-IR) is an emerging sea-level monitoring technique which uses signal-to-noise ratio (SNR) analysis to provide relative sea-level measurements using GNSS signals reflected from the water surface. In several studies, it has been...

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Main Author: Soon, Kit Ying
Other Authors: Emma Hill
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2020
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Online Access:https://hdl.handle.net/10356/141377
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1413772023-02-28T16:47:38Z Using the Global Navigation Satellite System-Interferometric Reflectometry (GNSS-IR) technique to detect sea-level changes in Singapore : a feasibility study Soon, Kit Ying Emma Hill Asian School of the Environment Singapore Land Authority Earth Observatory of Singapore ehill@ntu.edu.sg Social sciences::Geography::Global positioning system Social sciences::Geography::Environmental sciences The Global Navigation Satellite System-Interferometric Reflectometry (GNSS-IR) is an emerging sea-level monitoring technique which uses signal-to-noise ratio (SNR) analysis to provide relative sea-level measurements using GNSS signals reflected from the water surface. In several studies, it has been proven that results obtained from GNSS-IR are comparable with traditional tide gauges. However, this method has not previously been explored in Singapore’s context. In this study, which is the first of its kind in Singapore, we analyse GNSS data from two reference stations, namely Sultan Shoal (SSTS) and National Sailing Centre (SNSC). Using the data, we estimate reflector heights and relative sea-level changes. We then validate the technique by comparing the measurements to nearby tide-gauge records. The RMS difference between GNSS-IR-derived sea-level measurements and hourly tide-gauge records is found to be 8.0 cm. After validating, we use the measurements in further applications. The results were sufficient to reflect interesting findings such the different tidal regimes in the west and east of Singapore, as well as the monsoon-driven seasonal signals. This study demonstrates the feasible use of GNSS-IR to detect sea-level changes in Singapore and its considerable potential for future development. Bachelor of Science in Environmental Earth Systems Science 2020-06-08T03:47:52Z 2020-06-08T03:47:52Z 2020 Final Year Project (FYP) https://hdl.handle.net/10356/141377 en application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Social sciences::Geography::Global positioning system
Social sciences::Geography::Environmental sciences
spellingShingle Social sciences::Geography::Global positioning system
Social sciences::Geography::Environmental sciences
Soon, Kit Ying
Using the Global Navigation Satellite System-Interferometric Reflectometry (GNSS-IR) technique to detect sea-level changes in Singapore : a feasibility study
description The Global Navigation Satellite System-Interferometric Reflectometry (GNSS-IR) is an emerging sea-level monitoring technique which uses signal-to-noise ratio (SNR) analysis to provide relative sea-level measurements using GNSS signals reflected from the water surface. In several studies, it has been proven that results obtained from GNSS-IR are comparable with traditional tide gauges. However, this method has not previously been explored in Singapore’s context. In this study, which is the first of its kind in Singapore, we analyse GNSS data from two reference stations, namely Sultan Shoal (SSTS) and National Sailing Centre (SNSC). Using the data, we estimate reflector heights and relative sea-level changes. We then validate the technique by comparing the measurements to nearby tide-gauge records. The RMS difference between GNSS-IR-derived sea-level measurements and hourly tide-gauge records is found to be 8.0 cm. After validating, we use the measurements in further applications. The results were sufficient to reflect interesting findings such the different tidal regimes in the west and east of Singapore, as well as the monsoon-driven seasonal signals. This study demonstrates the feasible use of GNSS-IR to detect sea-level changes in Singapore and its considerable potential for future development.
author2 Emma Hill
author_facet Emma Hill
Soon, Kit Ying
format Final Year Project
author Soon, Kit Ying
author_sort Soon, Kit Ying
title Using the Global Navigation Satellite System-Interferometric Reflectometry (GNSS-IR) technique to detect sea-level changes in Singapore : a feasibility study
title_short Using the Global Navigation Satellite System-Interferometric Reflectometry (GNSS-IR) technique to detect sea-level changes in Singapore : a feasibility study
title_full Using the Global Navigation Satellite System-Interferometric Reflectometry (GNSS-IR) technique to detect sea-level changes in Singapore : a feasibility study
title_fullStr Using the Global Navigation Satellite System-Interferometric Reflectometry (GNSS-IR) technique to detect sea-level changes in Singapore : a feasibility study
title_full_unstemmed Using the Global Navigation Satellite System-Interferometric Reflectometry (GNSS-IR) technique to detect sea-level changes in Singapore : a feasibility study
title_sort using the global navigation satellite system-interferometric reflectometry (gnss-ir) technique to detect sea-level changes in singapore : a feasibility study
publisher Nanyang Technological University
publishDate 2020
url https://hdl.handle.net/10356/141377
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