Ubiquity of GPS

• More than 1 billion GPS receivers are used by consumers and businesses to get around.

• ATMs and Wall Street traders use super-accurate atomic clocks on the GPS satellites to time-stamp transactions.

• GPS signals can direct “smart bombs” to within a few yards of the target.

• Two dozen satellites orbiting in formation constitute GPS.

• Los Angeles Air Force Base in El Segundo developed GPS and is overseeing the upgrade.