Why is the eye in the PCT imagery fixed in the center, while the eye in the IR imagery moves around?
The PCT morphing algorithm needs to define a center of rotation in the PCT images, and so the algorithm’s center moves directly between PCT-defined center locations. However, the IR captures additional displacement of the eye, either because of vertical wind shear, errors in parallax correction, or image navigation error. The eye in the IR also undergoes more complicated motion through two mechanisms – trichoidal oscillation and short-lived departures from the interpolated path over short (approx. 1-12 hour) time periods. For the foreseeable future, the MIMIC-IR product will require more interpretation from the end-user (that’s you!) to be at its most effective. When the PCT eye position and the IR eye position do not exactly match, the end-user must mentally adjust the layer that is out of place. For example, if the eye in the PCT layer is fixed in the center while the eye in the IR revolves within a small space around the center, the end-user should picture the PCT eyewall revolving
