In order to have valid OCI data products, the sensor calibration has to be performed first. An inter-comparison method for the OCI calibration is, therefore, considered.
Orbital analysis is to be performed to sort out the time of occurrence for orbit overlaps.
However the cross-calibration method alone is not good enough because of the uncertainty of different sensors. Some experimental regions near Taiwan for calibration are shown in Fig . . When the OCI and the SeaWiFS pass those regions at the same time, the OCI will take images simultaneously. We will compare the images from different sensors for inter-comparison. Meanwhile, in-situ measurements at that region will be done for measuring radiance and water color at the time when the OCI and the SeaWiFS simultaneously pass those regions.