Measurement of ambient NO₂, SO₂, and O₃ concentrations using Differential Optical Absorption Spectroscopy (DOAS)

Authors

Ronald N. Choy ⋅ PH Manila Observatory, Ateneo de Manila University Campus
Jose T. Villarin, SJ ⋅ PH Manila Observatory, Ateneo de Manila University Campus
Sherdon Niño Uy ⋅ PH Department of Physics, Ateneo de Manila University
Charlotte Kendra Castillo ⋅ PH Department of Physics, Ateneo de Manila University

Abstract

A 280m open-path DOAS instrument was constructed. A folded-path configuration employing retroreflectors was chosen for advantages in sensitivity and convenience in instrument alignment and housing. An annular illumination single-telescope transceiver was used to reduce cost and system complexity. Data gathering was performed during March, April, and May of 2004. Calibration gases were unavailable, thus the instrument was calibrated with the OPSIS system (a commercial DOAS instrument located near the experiment). Results showed good agreement between the two instruments. The detection limit of the prototype instrument was estimated to be 1.4, 10, and 9 ppb for SO₂, NO₂, and O₃, respectively.

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Issue

2004: Proceedings of the 22nd Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP-2004-1G-01

Section

Instrumentation Physics

Published

2004-10-25

How to Cite

[1]

RN Choy, JT Villarin, SN Uy, and CK Castillo, Measurement of ambient NO2, SO2, and O3 concentrations using Differential Optical Absorption Spectroscopy (DOAS) , Proceedings of the Samahang Pisika ng Pilipinas 22, SPP-2004-1G-01 (2004). URL: https://proceedings.spp-online.org/article/view/SPP-2004-1G-01.