At first it was a flurry of letters and public statements from U.S. senators and members of the house. Then there was a senate hearing on the topic, and the issue was discussed in several other...
DHS report cover The U.S. Department of Homeland Security “did exactly what was required by Congress” in issuing its report in June on positioning, navigation and timing (PNT),...
U.S. Capitol Building. (Photo: RNTF) Last week, 27 members of the U.S. House Agriculture Committee sent a letter to Federal Communications Commission (FCC) Chairman Ajit Pai. In it, they urged him...
Monitoring the Ionosphere with Integer-Leveled GPS Measurements By Simon Banville, Wei Zhang, and Richard B. Langley INNOVATION INSIGHTS by Richard Langley IT’S NOT JUST FOR POSITIONING,...
Signal Characteristics of Civil GPS Jammers By Ryan H. Mitch, Ryan C. Dougherty, Mark L. Psiaki, Steven P. Powell, Brady W. O’Hanlon, Jahshan A. Bhatti, and Todd E. Humphreys GPS jamming is a...
The United States Space Force (USSF) and the Space and the Missile Systems Center achieved another major GPS milestone on July 27 when the GPS III Space Vehicle (SV) 03 received USSF’s Operational...
Beyond GPS report. Check out the report here. (Cover: NSI) George Mason University has revised a briefing paper on positioning, navigation and timing (PNT) in response to concerns about its...
By Inder Jeet Gupta It is well known that the phase center of a GNSS antenna can vary with the satellite direction. This phase center movement leads to aspect dependent carrier phase and code phase...
Synthetic-Aperture GNSS Signal Processing By Thomas Pany, Nico Falk, Bernhard Riedl, Carsten Stöber, Jón O. Winkel, and Franz-Josef Schimpl INNOVATION INSIGHTS by Richard Langley A SYNTHETIC...
Taking the Search out of Search and Rescue By David W. Affens, Roy Dreibelbis, James E. Mentall, and George Theodorakos In 1997, a Canadian government study determined that an improved search and...