SL4-138-3820

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NASA Photo ID

SL4-138-3820

Focal Length

100mm

Date taken

Time taken

GMT

Resolutions offered for this image:
4400 x 4600 pixels 4400 x 4600 pixels 478 x 500 pixels

Cloud masks available for this image:

Map Location
Image Details
Camera Information
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Spacecraft nadir point:

Photo center point: 30.0° N, 5.0° E

Photo center point by machine learning:

Nadir to Photo Center:

Spacecraft Altitude: nautical miles (0km)

Country or Geographic Name:

ALGERIA

Features:

GRAND ERG ORIENTAL

Features Found Using Machine Learning:

Cloud Cover Percentage:

0 (no clouds present)

Sun Elevation Angle:

Sun Azimuth:

Camera:

Hasselblad

Focal Length:

100mm

Camera Tilt:

Low Oblique

Format:

SO368: Kodak Ektachrome MS, equivalent to 2448 Kodak Aerochrome, ASA64, thin base, fine grain

Film Exposure:

Normal

Additional Information

Width	Height	Annotated	Cropped	Purpose	Links
4400 pixels	4600 pixels	No	No		Download Image
4400 pixels	4600 pixels	No	No	Original file from film scan	Download Image
478 pixels	500 pixels	No	No		Download Image

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Image Caption: A north-looking oblique view of chains of star sand dunes in eastern Algeria (30.0N, 5.0E) as seen from the Skylab space station in Earth orbit. The low sun angle of about 25 degrees above horizontal enhances the detail in this picture. The field of view at the base of the photograph is approximately 200 kilometers (125 miles). The individual dunes are roughly star-shaped rather than simple crescents which are common in dune fields. In this region the stars are aligned along ridges.