Satellites from the ground

May 19, 2017

Topic

Maps  / 

There is a 16-by-16 mile grid of big X’s in the Sonoran Desert that were used to calibrate spy satellites in the 1960s. They’re no longer in use, but Julie Anand and Damon Sauer have been studying the marks and overlaying the paths of publicly-known satellites that are detected during the time of a photograph.