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 ...

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 ...

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 ...

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.

to multipath. Improving the GPS orbit information (ephemeris) available to SPS users also would have a significant impact on the surveying and mapping community as longer and longer baselines could be ...