TY - JOUR
AU - Chang, Suya
AB - Volatile Organic Compounds (VOCs) contribute significantly to the formation of tropospheric ozone and PM₂.₅, adversely affecting human health and causing environmental issues such as photochemical smog. Existing VOCs monitoring methods in China are constrained in both spatial coverage and temporal frequency, limiting the ability to effectively monitor irregular and widely distributed emission sources. Space-based monitoring presents a solution to these challenges by enabling comprehensive global surveillance. While satellite data for VOCs assessments is already utilized in Europe and the United States, China is still in the developmental stages of this technology. This paper presents an innovative design for a spaceborne pollution gas detection system utilizing Fourier transform infrared spectral imaging technology combined with large-aperture retroreflect. The system is designed to track pollution gas emission sources and provide rapid response to leakage incidents. The system, utilizing the infrared absorption spectra of pollutants and incorporating large-aperture mirrors, enhances sensitivity and spatial resolution for wide-area pollutant detection. It achieves a detection swath of 20 km, with a spatial resolution of 0.5 km and a spectral resolution of 0.5 cm⁻¹, spanning the wavelength range from 2.8 to 14.3μm at an altitude of 556 km. Through data simulation and analysis, the system demonstrated the ability to detect 1,3-butadiene at a concentration of 10 ppm over an optical path length of 100 meters. To achieve the miniaturization and lightweight design of the system, a spatially folded optical structure has been employed, along with a three-layer structural layout, which has successfully reduced the optical envelope of the entire system to dimensions of 560 mm × 480 mm × 560 mm.
TI - The optical design of the spaceborne infrared hyperspectral imagers for VOCs gas detection
JO - Proceedings of SPIE
DO - 10.1117/12.3057174
DA - 2025-02-17
UR - https://www.deepdyve.com/lp/spie/the-optical-design-of-the-spaceborne-infrared-hyperspectral-imagers-UATlLy0sZM
SP - 135115K
EP - 135115K-7
VL - 13511
IS - 
DP - DeepDyve
ER -