IKONOS (1m) Satellite Image of Gobi Desert White Lines, China
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(Copyright © DigitalGlobe and Courtesy of Satellite Imaging Corporation)
This one-meter resolution satellite image shows uniform white lines in the Gobi Desert White Linest in northwestern China. According to news reports, the lines measure about one mile long and 3,000 feet across. Many experts believe these lines are used as targets for calibrating satellite and radar imaging systems. The high-resolution image was collected on July 27, 2010 by the IKONOS satellite while flying 423 miles above the Earth at an average speed of 17,000 mph, or four miles per second.