Lagrangian Coherent Structure Analysis of Terminal Winds: Three-Dimensionality, Intramodel Variations, and Flight Analyses

Figure 9

Lagrangian measures compared to vertical acceleration measured onboard an aircraft. From left to right, the data is from RAMS, FLOWSTAR, WRF, and LIDAR scans. Only backward time measures are compared since they are relevant to jolts experienced onboard. The top panels are the FTLE values interpolated along the glide path, and the bottom panels are the projected FTLE gradient. A strong windshear is reported at −1 NM from the runway threshold (0 in the -axis). The black curves in each panel are vertical acceleration measured from the aircraft. For the left three columns, the blue, red, and green curves correspond to data interpolated from the reduced FTLE, 2D FTLE, and LOS based FTLE. In the right column (from actual LIDAR), the blue curves are LOS based FTLE.

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