Red tide detection technique by using multi-temporal GOCI Level 2 Data

Abstract

This research compared absorption coefficients using multi-temporal COMS/GOCI Level 2 products. Also, through difference of absorption property which exists between satellite images in a time when a HAB did not occur and other satellite images in a time when a HAB occurred, a new red tide index has been developed. It was compared with outcomes of the red tide index of GOCI Level 2 data. At the result of comparing the GRI and RI, though areas with high values in all of the GRI and RI show a similar tendency. In case of the red tide index proposed in the study, it has a tendency to be overestimated compared with the existing red tide index of GOCI. But, in case of applying to images of no red tides, it could be confirmed that areas of wrong detection have been improved greatly in high concentration of suspended solid. The GRI can be available as a red tide index like the RI. Later, using the red tide index, it is judged that they will contribute to accuracy improvement of the detection technique of red tides.