In the case of many delays and cancellations due to low visibility, the main cause of Incheon Airport was secondary fog and Jeju Airport was blinded by wires.

In the case of a typical case analysis using fog index, Incheon Airport has a type of second-rate radio luminescence when the T-Td and T-Td on the ground of 925hPa are larger than 10 when fog phenomenon is observed.

Jeju Airport has similar index elements when fog phenomenon is observed, and the type of fog is radiated fog.

Other than this, it is difficult to identify the type of fog, so we excluded it.
This fog index element, as a result of its short-term verification, requires more case analysis and believes that it is more appropriate to approach numerically than to do it yourself.

So this experiment that we've done with our hands is very meaningful in that it paved the way for this process.