Sources: Digital Trends, Associated Press
quote: Once completed, the Block lll satellites are expected to allow civilian and military users to identify their position within 3 feet as opposed to 10 feet
quote: ...since the coordinates you start out with may not be entirely accurate *cough* Chinese embassy *cough*.
quote: The Block lll satellites will also make it more difficult for enemies to interfere with signals.
quote: The prototype made its way to Lockheed Martin's $80 million test facility...