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Retrieval of NO2 Column Amounts from Ground-Based Hyperspectral Imaging Sensor Measurements

1
School of Earth and Environmental Sciences, Seoul National University, Seoul 08826, Korea
2
National Institute of Environmental Research, Incheon 22689, Korea
3
Department of Atmospheric Sciences, Yonsei University, Seoul 03722, Korea
4
School of Urban & Environmental Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Korea
*
Author to whom correspondence should be addressed.
Remote Sens. 2019, 11(24), 3005; https://doi.org/10.3390/rs11243005
Received: 22 October 2019 / Revised: 8 December 2019 / Accepted: 9 December 2019 / Published: 13 December 2019
(This article belongs to the Section Environmental Remote Sensing)
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). View Full-Text
Keywords: hyperspectral imaging sensor; hyperspectrometer; nitrogen dioxide hyperspectral imaging sensor; hyperspectrometer; nitrogen dioxide
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MDPI and ACS Style

Park, H.-J.; Park, J.-S.; Kim, S.-W.; Chong, H.; Lee, H.; Kim, H.; Ahn, J.-Y.; Kim, D.-G.; Kim, J.; Park, S.S. Retrieval of NO2 Column Amounts from Ground-Based Hyperspectral Imaging Sensor Measurements. Remote Sens. 2019, 11, 3005. https://doi.org/10.3390/rs11243005

AMA Style

Park H-J, Park J-S, Kim S-W, Chong H, Lee H, Kim H, Ahn J-Y, Kim D-G, Kim J, Park SS. Retrieval of NO2 Column Amounts from Ground-Based Hyperspectral Imaging Sensor Measurements. Remote Sensing. 2019; 11(24):3005. https://doi.org/10.3390/rs11243005

Chicago/Turabian Style

Park, Hyeon-Ju; Park, Jin-Soo; Kim, Sang-Woo; Chong, Heesung; Lee, Hana; Kim, Hyunjae; Ahn, Joon-Young; Kim, Dai-Gon; Kim, Jhoon; Park, Sang S. 2019. "Retrieval of NO2 Column Amounts from Ground-Based Hyperspectral Imaging Sensor Measurements" Remote Sens. 11, no. 24: 3005. https://doi.org/10.3390/rs11243005

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