Technical problems have again delayed the launch of a satellite designed to study the Earth's atmosphere. NASA's Aura satellite was on the launch pad at an Air Force base in California when an alarm prompted the launch team to halt the process just minutes before take-off this morning. Engineers say the scrub is due to a battery problem. The satellite's launch has been delayed several times before -- including yesterday, when there was another technical glitch. The 785 million-dollar satellite carries instruments to study the composition of Earth's atmosphere.