Extended Data Fig. 1: Zonal velocities obtained in first estimation.
From: The nightside cloud-top circulation of the atmosphere of Venus
a–c, Results for template sizes of 30° × 30° (a), 20° × 20° (b) and 10° × 10° (c). Cloud-tracked vectors that satisfy the criteria described in Methods are plotted as dots. The limit of the major axis length in criterion (3) is 60 m s−1 for a, 50 m s−1 for b and 45 m s−1 for c. The blue dotted line shows the moving average with a sliding window of 20° in latitude and the red solid line shows the rigid body rotation with an equatorial velocity of −95 m s−1, which was adopted as the background zonal velocity in the second estimation
