Measurement and Analysis of NO \(_{{2}}\) Concentration by Differential Optical Absorption Spectroscopy: Towards Enhanced Air Quality Monitoring

The effective monitoring of nitrogen dioxide (NO \(_{{2}}\) ) assumes pivotal significance in fostering sustainable environments, primarily due to its substantial impact on air quality. This study constitutes a significant stride in this direction by harnessing the capabilities of Differential Optical Absorption Spectroscopy (DOAS) to measure and comprehend NO \(_{{2}}\) levels, thereby shedding comprehensive light on its vertical distribution within the troposphere. The DOAS method also offered a unique advantage in terms of identifying and quantifying trace gases with unknown vertical columns in the designated region. These intricate tasks are accomplished by leveraging UV and visible wavelength range spectroscopy, which makes use of scattered sunlight as the fundamental light source. Our work delves into the technical intricacies underpinning DOAS while emphasizing the broader context of its utility. These include the use of pixel-based gas profile analysis, statistical methods, and Python scripts to analyze the measured gas concentration data. By capitalizing on these advanced techniques, a comprehensive understanding of trace gas distribution and behavior is achieved, thereby making a substantial contribution to the enhancement of environmental monitoring strategies. In essence, our work offers both technical and analytical insights that support sustainable practices for monitoring and managing air quality.