Venus cloud tracking -- March 24, 2006

Fig 1

(L) Flow calculated from cross correlation. (R) Flow calculated from ranked cross correlation.

Fig 2

Same as above, but showing all candidate vectors.

Fig 3

(L-1) Ranked cross correlation flow. (2) Flow filtered to keep only vectors with dx <= 0, dy <= dx, and CC != 0. (3) dy <= 0.5 * dx. (R-4) dy <= 0.25 * dx.

Fig 4

(TL-1) dx vs. x for #1 above. (2) Histogram of all dx values. (3) dx vs. x for #2 above. (BR-4) Histogram of dx.

Fig 5

(TL-1) dx vs. x for #3 above. (2) Histogram of all dx values. (3) dx vs. x for #4 above. (BR-4) Histogram of dx.

Fig 6

dx vs. y for #4 filtered vectors above. Each plot corresponds to one column of vectors in the flow. (L) Points showing data. (R) Lines drawn between points.

Fig 7

Ranked correlation vectors for single flow element with non-square domain and range, and range offset from domain.

Fig 8

2 different grids of non-overlapping non-square offset flow elements and resulting flow vectors for overlapping grid. Parameters for tiled and non-tiled grids are shown at bottom.

Fig 9

(L-1) Same geometry as at right above, but for 2x overlapping domain density in y. (2) 4x density in y. (R-3) #2 filtered to dy <= 0.25 *dx.

vectors0.txt

Vector file for #2 above. Columns are x1, y1, x2, y2, dx, dy, CC value.

Fig 10

dx vs. y profiles for #2 and #3 above. (R) Points show data support for #3.

Fig 11

High variation in vectors near poles may be due to projection distortion and lack of interpolation.