NAVIGATION SATELLITE LAUNCHED
CAPE CANAVERAL, FLA.
An advanced navigation satellite was launched this week aboard the US Air Force's new 128-foot-tall Delta 2 rocket. The satellite, which contains an atomic clock with an error rate of one second every 300,000 years, was designed to provide information on longitude, latitude, and altitude.
The Delta 2 is the first of three new space boosters the Air Force ordered built to carry national security payloads after the space shuttle Challenger exploded in 1986.