数据说明
GOCI Normalized Water-Leaving Radiance at 443nm (LW2)
上传时间:2019-05-23 08:53:40 浏览次数:作者与来源:admin
LW2 is the retrieved normalized water-leaving radiance at the 443nm from the GOCI Level-1 data.
Unit: mW/(cm2*µm*sr)
Resolution:  500m
Duration: 2011-2018
Source: GOCI Level-1 data provided by the Korean Ocean Satellite Center.
Version: 2018
Dataset Name: SIO_COMS_GOCI_CJE/SIO_COMS_GOCI_BOH
Product Name: SIO_COMS_GOCI_yyyy-MM-dd-HH-mm-ss_L3A_CJE/BOH_500M_LWN443_HE2013
Processing:
The UV-AC atmospheric correction developed by He et al. (2012; 2013) was applied to the GOCI Level-1 data to retrieve the normalized water-leaving radiance at different bands. Specifically, we assume that water-leaving radiance at 412nm was zero, and the aerosol scattering radiance was estimated at 412nm. Based on the 745nm and 865nm bands, the epsilon value of the aerosol scattering was estimated by assuming that the water-leaving radiance at these two bands were zero. Then, using the estimated 412nm aerosol scattering radiance and epsilon values, the aerosol scattering radiance at all bands were calculated, and the normalized water-leaving radiance (Lw) were derived.
Known Issues:
The UV-AC algorithm is suitable to the high turbid waters. In the clear shelf waters, it may have high uncertainty. In addition, GF-4 is not an ocean color satellite, and the signal-to-noise ratio is low, which limit the data only suitable for the turbid waters.
Reference
Xianqiang He*, Knut Stamnes, Yan Bai, Wei Li, Difeng Wang. Effects of Earth curvature on atmospheric correction for ocean color remote sensing. Remote Sensing of Environment, 209,118–133,2018.
He, X., Bai, Y., Pan, D., Tang, J., & Wang, D. (2012). Atmospheric correction of satellite ocean color imagery using the ultraviolet wavelength for highly turbid waters. Optics Express, 20(18), 20754-20770.
Acknowledgment
Please cite the above two references if this dataset are used.