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http://dx.doi.org/10.7780/kjrs.2017.33.4.7

Spectral Reflectance of Mongsanpo Tidal Flat, Korea, by using Spectroradiometer Experiments and Landsat Data  

Kim, Bum-Jun (Korea Ocean Satellite Center, Korea Institute of Ocean Science and Technology)
Lee, Sungsoon (Geological Research Center, Korea Institute of Geoscience and Mineral Resources)
Lee, Hoonyol (Division of Geology and Geophysics, Kangwon National University)
Publication Information
Korean Journal of Remote Sensing / v.33, no.4, 2017 , pp. 411-422 More about this Journal
Abstract
This research aims to analyze spectral reflectance of intertidal zone and its changes under various environmental conditions. We sampled sand of Mongsanpo tidal flat, Korea, and measured its spectral reflectance by using a spectroradiometer under various water contents, compositions and granularity. We also simulated the reflectance of Landsat 7 ETM+ and compared it with an actual satellite data. Five locations were selected for sampling from the coastline towards the ocean. Grain size diminished stepwise from the coastline to ocean direction, while spectral reflectance differed with wavelength. Water contents lowered the overall reflectance especially at the water absorption bands. Spectral reflectance data were then converted into the simulated one by using Landsat 7 ETM+ spectral reflectance function to be compared with the actual Landsat 7 ETM+ images. It showed the decrease of the spectral reflectance due to the increase of moisture contents from seashore towards the ocean. It is shown that Landsat 7 ETM+ imagery can be efficient to extract moisture contents in the tidal flat while compositional analysis needs satellite sensors with much higher spectral resolution.
Keywords
spectral reflectance; Mongsanpo; tidal flat; water content; Landsat;
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