STS045-618-13

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Spacecraft nadir point: 11.7° S, 10.4° E

Photo center point: 16.5° S, 12.0° E

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Nadir to Photo Center: South

Spacecraft Altitude: 160 nautical miles (296km)
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Image Caption:
STS045-618-013 and STS045-618-016: Namib Desert Dune Patterns
STS045-618-013: Namib Desert coastal dunes, southern Angola.
The trend of the dunes in the sand sea show a great clockwise
"wheelround." A similar pattern of dune trends occurs further
south in Namibia (STS045-618-016), south of the Cunene River (the
border between Namibia and Angola). Friction caused when south-
erly winds blow off the ocean over relatively rougher landsur-
faces are deflected rightwards in the southern hemisphere. De-
flection of winds up major river valleys may also help explain
this striking pattern.