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PNT Makes the World Go Around: The UK’s New Alternative PNT Strategy

There has never been a clearer and more widespread acknowledgement of PNT vulnerability. With its new strategy for ensuring the continuity of positioning, navigation and timing (PNT) services, the United Kingdom adds considerable impetus to a trend that has already witnessed new determination on the parts of the United States and the European Union to assess real, alternative PNT (A-PNT) and/or complimentary PNT (CPNT) solutions.

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By Peter Gutierrez
IGM DOT Volpe
October 29, 2023

All Jammed Up, DOT Urgently Seeks Complementary PNT

For years, the U.S. Department of Transportation (DOT) has been exploring the technologies and systems necessary to provide positioning, navigation, and timing (PNT) services to complement the Global Positioning System (GPS) so that these critical services remain available even when GPS signals are disrupted. In the past few months, the department has ramped up these Complementary PNT (CPNT) efforts, from its issuance of a CPNT Action Plan in September to a related Request for Information (RFI) seeking industry input on CPNT technologies. What are these efforts, how are they going and why the sense of urgency now?

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By Dawn M.K. Zoldi (Colonel, USAF, Ret.)
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September 10, 2023

Pinpointing GNSS Interference from Low Earth Orbit

In the past decade, there has been a sharp increase in GNSS outages due to deliberate GNSS jamming. Receivers in LEO are uniquely situated to detect, classify and geolocate terrestrial GNSS jammers. This article explores two-step and direct geolocation of terrestrial GNSS jammers from LEO. 

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By Inside GNSS
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July 28, 2023

Backing Up GNSS

The Joint Research Centre of the European Commission tested seven advanced alternative sources of positioning navigation and timing (A-PNT) platforms through a performance assessment campaign, proving there are viable alternatives to GNSS available in the commercial market today.

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By Inside GNSS
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July 24, 2023

Q: How can GNSS augmentation services be combined to simultaneously support multiple user classes with demanding but varied requirements?

SAM PULLEN STANFORD UNIVERSITY, FRANCESCO RISPOLI, 
ALESSIA VENNARINI, ARIANNA PERSIA, RADIOLABS , ALESSANDRO NERI, ROMA TRE UNIVERSITY AND RADIOLABS, ROBERTO CAPUA SOGEI


A: Many augmentations of GNSS satellite navigation have been developed and fielded since the GPS constellation was completed and declared fully operational in 1995. The best known of these are satellite-based and ground-based augmentation systems (SBAS and GBAS), which are public systems designed to support civil aviation.

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By Sam Pullen
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