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Date: 07/25 (Thu)
Time: 16:30-18:00
Place: Cosmo Studio
Speaker: Ahmad Shaqeer

Title:
Preliminary Experiment of Spectro-polarimetric BRF Measurement of Water Surfaces using LCTF Camera

Abstract:
Riverine wetlands are of particular interest as it provides most of the water requirements. However, water pollution has become a serious issue in Malaysia due to its major threat to the ecosystem and reduces water production and supply to the houses. The traditional approach of finding and monitoring wetland using in situ measurement methods is found to be infeasible given the cost and time requirements and difficulties in accessing the required area. Thus, remote sensing-based methods using multispectral are more favored. Even still, the methods have shortcomings such as it has a specific spatial resolution, dependent on weather conditions, besides with water bodies have low spectral reflectance, and a certain type of wetlands share the same spectral characteristics with water, thus, increasing the difficulty in distinguishing both features. The multiple pointing satellite system is required to combat the problems yet it requires new measurement techniques. Therefore, this study focuses on the bidirectional reflectance factor (BRF) measurement of polluted water. BRF measurement helps in calculating the reflectance with respect to the changing of the angles i.e. azimuth, zenith, light incidence, camera reflected, and polarization angles. Furthermore, polarization helps in separating the polarized and unpolarized effect of the light reflected by the surface. This phenomenon will help in obtaining the information on the water near-surface condition. However, external disturbances such as waves, aerosol or atmospheric properties, cloud have to be considered during the measurement. In spite of that, the information is vital as it provides the information of the particles, quality, or color of the water which can relate to various applications such as detecting discharge points of pollutants, measuring the index of sediment and plankton concentrations and analysis of water current and circulation patents.
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