UV-Vis Absorbance and Fluorescence Characterization of Pasig River Surface Water Samples Towards the Development of an LED Fluorescence Lidar System - Cadondon, Jumar G.; Environment And RemoTe sensing researcH (EARTH) laboratory, Physics Department, College of Science, De La Salle University Manila 2401 Taft Avenue, Manila 1004, Philippines (International Journal on Advanced Science, Engineering and Information Technology, 2021)