By - Gene H. McCall* Los Alamos, New Mexico Abstract: This paper is a rough, preliminary proposal for a positioning, navigation, and timing(PNT) system using the experience gained from the fielding of large constellations, such as Starlink … [Read more...] about Positioning Navigation, and Timing: New Needs for a New Century
Contributor: Gene H. McCall*
It is all a matter of Time
The European Space Agency realized and announced the need to protect the capabilities of GNSS and to design systems that will provide the characteristics needed in the future. The United States government has done neither of these. The … [Read more...] about It is all a matter of Time
Assured Position, Navigation, and Timing for the United States
Left: World map showing the location of GPS ground components It is shown that the issue associated with assuring Position, Navigation, and Timing is not one of building backup systems to augment the GPS, but, rather, one of designing and building … [Read more...] about Assured Position, Navigation, and Timing for the United States
Universal Positioning, Navigation, and Timing: A System for the Future
Abstract The problems of the vulnerability of the Global Positioning System to jamming and interference and the inadequate performance of eLoran are addressed. A new system, which should satisfy national needs for decades into the future, is … [Read more...] about Universal Positioning, Navigation, and Timing: A System for the Future
GPS Vulnerability: Options and Alternatives
Abstract The Global Positioning System (GPS) was declared operational on December 8, 1993. Since that time the system and the receivers that use it have been improved to a level of performance unimagined by its creators. Also, the system has been … [Read more...] about GPS Vulnerability: Options and Alternatives
Securing the GPS
Recently, there has been a considerable interest shown in the fact that the nation has become very dependent on the GPS signals and the capabilities that they enable. There have been many presentations by those who claim that GPS signals are weak … [Read more...] about Securing the GPS
A Navigation and Timing Primer: Concepts and Misconceptions
This paper attempts to establish a common base of terms and concepts related to navigation. It is intended to set the definitions and principles which will enable rational discussions of navigation issues, such as the search for alternatives to … [Read more...] about A Navigation and Timing Primer: Concepts and Misconceptions