Arizona Water Resource, Susanna Eden ed., vol. 23, no. 2, pages 1-12, 12 pp., Water Resources Research Center, Tucson, AZ, Spring, 2015
Glance up at the night sky, and you might see the movement of a celestial object belonging to a fleet of earth-observing satellites launched by the National Aeronautics and Space Administration (NASA). Eighteen earth focused satellites complete their daily orbits around the earth, not to observe and understand the far reaches of space, but to observe and understand our changing planet. Satellite observatories have the distance from Earth to observe the big picture and the technological sophistication to track changes in the biosphere at high spatial and temporal resolutions. Their images awe the eye and shape our understanding.