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 ...

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 ...

Global positioning systems – GPS technology – has been around for decades, but still has a science fiction feel, and is only now being used by private industry. There have been grandiose predictions ...

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 ...

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.

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 ...