Cloud images from the pioneer venus orbiter.
Ultraviolet images of Venus over a 3-month period show marked evolution of the planetary scale features in the cloud patterns. The dark horizontal Y feature recurs quasi-periodically, at intervals of about 4 days, but it has also been absent for periods of several weeks. Bow-shaped features observed in Pioneer Venus images are farther upstream from the subsolar point than those in Mariner 10 images.
Travis
L D
LD
Coffeen
D L
DL
Del Genio
A D
AD
Hansen
J E
JE
Kawabata
K
K
Lacis
A A
AA
Lane
W A
WA
Limaye
S S
SS
Rossow
W B
WB
Stone
P H
PH