STS040-72-87

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Spacecraft nadir point: 39.1° N, 131.5° E

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Spacecraft Altitude: 155 nautical miles (287km)
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Image Caption: STS040-72-087 Sunglint as a Motion Indicator Open-cell cumulus
clouds in the center top of the scene are surrounded by ringlets
of sunglint. This phenomenon is caused by a combination of weak
horizontal surface winds and the vertical wind fields parted by
the cumulus. In this scene, maximum sunglint represents a flat
(mirror-like) sea surface with little or no wind and minimum sun-
glint comes from a rough sea surface caused by winds surging into
each individual cumulus cell.