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Park, Sang Seo
Environmental Radiation Monitoring Lab.
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Retrieval of NO2 Column Amounts from Ground-Based Hyperspectral Imaging Sensor Measurements

Author(s)
Park, Hyeon-JuPark, Jin-SooKim, Sang-WooChong, HeesungLee, HanaKim, HyunjaeAhn, Joon-YoungKim, Dai-GonKim, JhoonPark, Sang Seo
Issued Date
2019-12
DOI
10.3390/rs11243005
URI
https://scholarworks.unist.ac.kr/handle/201301/30957
Fulltext
https://www.mdpi.com/2072-4292/11/24/3005
Citation
REMOTE SENSING, v.11, no.24, pp.3005
Abstract
Total column amounts of NO2 (TCN) were estimated from ground-based hyperspectral imaging sensor (HIS) measurements in a polluted urban area (Seoul, Korea) by applying the radiance ratio fitting method with five wavelength pairs from 400 to 460 nm. We quantified the uncertainty of the retrieved TCN based on several factors. The estimated TCN uncertainty was up to 0.09 Dobson unit (DU), equivalent to 2.687 × 1020 molecules m−2) given a 1° error for the observation geometries, including the solar zenith angle, viewing zenith angle, and relative azimuth angle. About 0.1 DU (6.8%) was estimated for an aerosol optical depth (AOD) uncertainty of 0.01. In addition, the uncertainty due to the NO2 vertical profile was 14% to 22%. Compared with the co-located Pandora spectrophotometer measurements, the HIS captured the temporal variation of the TCN during the intensive observation period. The correlation between the TCN from the HIS and Pandora also showed good agreement, with a slight positive bias (bias: 0.6 DU, root mean square error: 0.7 DU).
Publisher
Multidisciplinary Digital Publishing Institute (MDPI)
ISSN
2072-4292
Keyword (Author)
hyperspectral imaging sensorhyperspectrometernitrogen dioxide

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