Cloud-Tracked Winds fromPioneer VenusOCPP Images

Saturn eddy momentum fluxes and convection: First estimates from Cassini images

“…Winds are measured using an automated tracking technique adapted from that originally developed for Pioneer Venus (Rossow et al, 1990). Evenly spaced 100 × 50 pixel (2 • × 1 • ) target boxes are defined in the first of an image pair and a larger area of the second image is searched to find the location of maximum correlation between the two target arrays.…”

Vertical propagation of planetary-scale waves in variable background winds in the upper cloud region of Venus

“…Wavenumber-1 traveling waves with periods of $4 d (d = Earth days) and $5 d have been observed as cloud brightness and wind velocity oscillations in the data taken by Orbiter Cloud Photo-Polarimeter onboard Pioneer Venus Orbiter (Del Genio and Rossow et al, 1990). The 4-d wave is identified as a Kelvin wave based on the equatorial confinement of the zonal wind oscillation, absence of the meridional oscillation, and the prograde propagation relative to the background wind.…”

Visualization of time-dependent data with feature tracking and event detection

“…In pixel-based methods, the displacement is determined on a pixel-to-pixel basis. Well-known methods are based on cross-correlation [13], or optical flow [2]. However, these approaches are computationally too expensive for 3D field data.…”