The Aura spacecraft heads a convoy of vehicles Aura is scheduled to launch aboard a Boeing Delta II rocket.

The Aura spacecraft on a transporter heads a convoy of vehicles in the predawn hours as it moves to Space Launch Complex 2 on North Vandenberg Air Force Base, Calif. The latest in the Earth Observing System (EOS) series, Aura is scheduled to launch July 10 aboard a Boeing Delta II rocket. Aura’s four state-of-the-art instruments will study the dynamics of chemistry occurring in the atmosphere. The spacecraft will provide data to help scientists better understand the Earth’s ozone, air quality and climate change.