A5035418739- Geological and Geophysical Studies
- Geophysics and Gravity Measurements
- Synthetic Aperture Radar (SAR) Applications and Techniques
- GNSS positioning and interference
- earthquake and tectonic studies
- Indoor and Outdoor Localization Technologies
- Ocean Waves and Remote Sensing
- Advanced Frequency and Time Standards
- High-pressure geophysics and materials
- Seismology and Earthquake Studies
- Oceanographic and Atmospheric Processes
- Geochemistry and Geologic Mapping
University of Otago
2017-2023
University of Technology Malaysia
2010-2022
The recent development of the smartphone Global Navigation Satellite System (GNSS) chipsets, such as Broadcom BCM47755 and Qualcomm Snapdragon 855 embedded, makes instantaneous cm level real-time kinematic (RTK) positioning possible with Android-based smartphones. In this contribution we investigate single-baseline RTK performance Samsung Galaxy S20 Google Pixel 4 (GP4) smartphones while making use dual-frequency L1 + L5 Positioning (GPS), E1 E5a Galileo, Quasi-Zenith (QZSS) B1 BeiDou (BDS)...
Postseismic deformation in the far field following large earthquakes is increasingly recognised as a key factor contributing to regional land height and relative sea-level (RSL) changes. The Sumatran subduction zone provides unique setting study this owing availability of far-field (600 – 1000 km from trench) long-term (>20 years) Global Navigation Satellite System (GNSS) observations. In study, we model GNSS-constrained postseismic multiple great (Mw ≥ 8.0) using...
Abstract Great earthquakes (≥M8.0) often cause widespread postseismic decay in areas well beyond any recognised plate boundaries. The M w 8.6 and 8.2 northern Sumatra doublet occurred on 11 April 2012, near the intersection of Indian, Australian Sundaland plate, have caused an extensive coseismic offset over region. In this study, long-term GPS time-series (1999–2014) suggests that associated with had a significant effect eastern boundary up to western region Peninsular Malaysia. Before 2004...
High-precision global navigation satellite system (GNSS) positioning and can be achieved with carrier-phase ambiguity resolution when the integer least squares (ILS) success rate (SR) is high. The users typically prefer float solution under scenario of having a low SR, ILS SR best equivariant (BIE) estimator an alternative since it minimizes mean squared errors (MSEs); hence, will always superior to both its counterparts. There has been recent development GNSSs consisting Global Positioning...
Kelantan is one of the highest groundwater-consumption states in Malaysia. The groundwater extraction provides an alternative solution for accessing a fresh water supply. However, over-exploitation can lead to harmful geomorphological effects. We investigate deformation rate due land subsidence Kelantan, Malaysia, using 17 years GPS time-series (1999.0 – 2016.0) recorded at 11 sites. Our results agree with previous study, suggesting that northern subsiding maximum 4.22 ± 0.17 mm/yr (1σ...
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at Journal of Geophysical Research - Solid Earth. ESSOAr a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing the latest version by default [v1]An Estimate Coupling Sunda Subduction Zone from Campaign Continuous GPS (1991 2016)Authors Chien Zheng YONG iD Paul H. Denys Chris F. Pearson See all authors...