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Remote Sens. 2016, 8(5), 378; doi:10.3390/rs8050378

Evaluation of Stray Light Correction for GOCI Remote Sensing Reflectance Using in Situ Measurements

Korea Ocean Satellite Center, Korea Institute of Ocean Science and Technology, 787 Haean-ro, Ansan-si, Gyeonggi-do 15627, Korea
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Academic Editors: Xiaofeng Li and Prasad S. Thenkabail
Received: 18 February 2016 / Revised: 25 April 2016 / Accepted: 28 April 2016 / Published: 4 May 2016
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Abstract

The Geostationary Ocean Color Imager (GOCI) is the world’s first ocean color sensor in geostationary orbit. Although the GOCI has shown excellent radiometric performance with little long-term radiometric degradation and a high signal-to-noise ratio, there are radiometric artefacts in GOCI Level 1 products caused by stray light detected within the GOCI optics. To correct the radiometric bias, we developed an image-based correction algorithm called the correction of the interslot discrepancy using the minimum noise fraction transform (CIDUM) in a previous study and evaluated its performance with respect to the physical radiometric quantity stored in Level 1 products, i.e., top-of-atmosphere radiance. This study evaluated the performance of the CIDUM algorithm in terms of remote sensing reflectance, which is one of the most important products in ocean color remote sensing. The resultant CIDUM-corrected remote sensing reflectance products were validated using both relative (within the image) and absolute references (in situ measurements). Image validation showed that CIDUM corrected the bias in remote sensing reflectance (up to 20%) and reduced the bias to ≤5% in the tested image. In situ validation showed that relative uncertainty was reduced by around 10% within the visible bands and the correlation between the in situ and GOCI radiometric data was enhanced. View Full-Text
Keywords: GOCI; ocean color; stray light; CIDUM; remote sensing reflectance; atmospheric correction; validation; in situ measurements GOCI; ocean color; stray light; CIDUM; remote sensing reflectance; atmospheric correction; validation; in situ measurements
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Kim, W.; Moon, J.-E.; Ahn, J.-H.; Park, Y.-J. Evaluation of Stray Light Correction for GOCI Remote Sensing Reflectance Using in Situ Measurements. Remote Sens. 2016, 8, 378.

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