Years ago, global positioning system (GPS) was an exotic service involving expensive equipment and used by the government and professionals in such areas as surveying, earth resources, and commercial ...

NOTICE: The project that is the subject of this report was approved by the Governing Board of the National Research Council, whose members are drawn from the councils of the National Academy of ...

Sometimes technology is indistinguishable from magic. Like many people, I’ve come to take for granted the availability of navigation systems in cars and handheld devices based on the Global ...

Abstract: GPS has evolved into a vital component of our critical infrastructure. Originally developed over 50 years ago as a military navigation system, it has since been transformed into an ...

Global Navigation Satellite Systems (GNSS) underpin modern positioning and navigation, integrating signals from multiple satellite constellations such as GPS, GLONASS, Galileo and BeiDou. Recent ...

What if GPS had existed in 1565? No satellites or microelectronics, sure—but let’s play along. Imagine the bustling streets of Antwerp, where merchants navigated the sprawling city with woodcut maps.

LOS ANGELES AIR FORCE BASE, El Segundo, Calif. — The U.S. Air Force Global Positioning System (GPS) IIF-4 satellite is ready for launch aboard a United Launch Alliance Atlas V Launch Vehicle on May 15 ...

provide some protection against interfering signals. Although quantitative measures of resistance to RF interference, such as jammer-to-signal ratio (J/S) measured in decibels (dB) do exist, these ...