Evaluation of the improvement in GOCI Rrs data corrected for the stray light driven radiometric anomaly

Abstract

Compared to the atmospheric signal, signals from ocean is small and, therefore, is more susceptible for any radiometric anomalies in the data. So, the inter-slot radiometric discrepancy (ISRD), which is meant radiometric inconsistency between the adjacent slots, is clearer in remote sensing reflectance (Rrs) than in top of atmosphere (TOA) radiance. This research analyzes radiometric inconsistency between the adjacent slots in Rrs data of GOCI, which is retrieved from L1B TOA radiance using the correction of inter-slot radiometric discrepancy using the minimum noise fraction transform, namely CIDUM. GDPS 1.6 is used for the atmospheric correction. The effect of horizontal ISRD is mitigated in all slot images and the differences between upper- and bottom- slots becomes close to 0 in band 4 through 8. With the NIR band accuracy of L1B product improved by SLRI correction algorithm, the available Rrs data increase by 2~18% in each band than before using the correction algorithm. 106