Resilient Positioning, Navigation and Timing (RPNT)

What is Resilient PNT?

Resilient positioning, navigation and timing (RPNT) is the convergence of positioning, navigation and timing technology with non-traditional and emerging technology to improve the reliability, performance and safety of mission-critical applications in the air, on land and in the sea. Resilient PNT solutions are used where even the smallest discrepancy in data accuracy, availability and stability can result in a mission failure, loss of life, or battlefield disadvantages, and significant economic loss.

Have Questions? Ask an Expert

resilient GNSS diagram

Beyond the limitations of GPS

Although GPS and GNSS in general are the most established and primary PNT reference sources, they have well-known vulnerabilities and limitations that require protection and mitigation:

  • GPS and GNSS signals are easily disrupted by unintentional interference from radio transmitters
  • GPS and GNSS signals are extremely weak, cannot penetrate buildings and can easily be jammed
  • Civilian GPS and GNSS signals are not encrypted and can easily be spoofed

The world’s most critical applications rely on resilient positioning, navigation and timing

The need for PNT solutions with integrity and trust extends to commercial applications as well, to support critical homeland security and homeland infrastructure systems such as communications networks, financial systems and power grids. There is a global need, across all industries, for highly accurate positioning, navigation and timing data to improve the reliability, performance and safety of these critical, remote and often high-risk operations.

To ensure the highest levels of data integrity, the underlying PNT technologies, products and systems must be resilient.

What would happen without resilient PNT?

UAV with lost communication link
Ship with no rescue beacon
Family with scrambled TV signal
Driverless car without nav signal

Why Orolia?

As PNT experts with a deep and rich history in critical timing and synchronization, Orolia works aggressively to integrate assured positioning, navigation and timing technologies into all our products. Solutions to detect and mitigate interference are part of our core DNA.

Have Questions? Ask an Expert

Our solutions include:

  • GPS and GNSS technology covering all satellite-based time and positioning signals including encrypted military SAASM and M-Code receivers, GPS, Galileo, GLONASS, IRNSS, and QZSS.
  • In-house time and frequency equipment manufacturing that include compact Rubidium standards and space-qualified Hydrogen Maser standards.
  • High-power satellite-based technology STL (Satellite Time and Location) that penetrates buildings, obstructions and is resilient to jammers, which can be used as a secure signal of opportunity to complement GPS and other GNSS satellite signals. These make each application more accurate, secure and less prone to interference and attack.
  • BroadShield jamming and spoofing detection systems that use over 75 proven detection algorithms to detect interference and spoofing within the GPS signal and GPS spectrum.
  • Alternative PNT signals and Signals of Opportunity receivers leveraging available signals such as eLORAN to increase the probability of maintaining accurate PNT information.
  • Vulnerability test systems that can evaluate the effects of interference, jamming and spoofing on systems that rely on GNSS signals.
  • Integration of various inertial sensors including MEMS-based and FOG-based sensors that offer a level of stand-alone performance in the absence of GPS references for position and navigation systems.
  • Hardened products that extend into harsh tactical operational environments and are resistant to cyber attacks.
  • Smarter use of the entire PNT ecosystem, including feature-rich GPS reception hardware and intelligent software techniques, reception from multiple constellations, multi-frequency signals, and augmentation systems.
PNT signals

Whenever safety, security and reliability are critical, Orolia leads the way

Orolia provides the Resilient PNT building blocks that are vital to mission critical applications. By integrating GNSS with proven existing technologies, we have created a comprehensive ecosystem of resilient PNT solutions trusted by thousands of customers. We improve the reliability, performance and safety of critical and remote operations to help customers secure, localize and navigate people or objects in challenging environments.

Resilient PNT Solutions

Application Notes

More Info
The US global military GPS-GNSS devices market is expected to increase to $2.8 billion by 2027, and $25.7 billion globally. The result of all this growth has been equipment that is lighter, more capable, with faster processing and a small form factor, and low SWAP (Size, Weight, and Power).  This growth means specific challenges that the military must address to remain competitive. Applications needs zero failure, dual redundancy equipment that sustains and extends capabilities, in and out of denied environments.
pdf - 6 MB
Monday, December 4, 2017


More Info
The VersaPNT combines a GNSS receiver, inertial measurement technology and high-performance timing oscillators to provide Assured PNT in GNSS-degraded and denied environments.
pdf - 521 KB
Monday, September 25, 2017


More Info
BroadShield is an option that integrates over 75 GPS jamming and spoofing detection algorithms into the SecureSync Precision Time and Frequency Platform.
pdf - 424 KB
Wednesday, September 26, 2018
More Info
STL (Satellite, Time & Location) is a revolutionary source for precision time broadcast from the Iridium® satellites constellation. Orolia has partnered with Satelles to integrate this signal into the SecureSync platform, providing a secure and accurate timing reference that can augment or take the place of GPS in RF denied environments. STL
pdf - 383 KB
Monday, March 25, 2019
More Info
ThreatBlocker GPS Jamming and Spoofing Protection Device
pdf - 421 KB
Thursday, January 17, 2019
More Info
The VersaPNT combines a GNSS receiver, inertial measurement technology and high-performance timing oscillators to provide Assured PNT in GNSS-degraded and denied environments.
pdf - 385 KB
Wednesday, September 26, 2018


More Info
Infographic sumarizes the features of STL as a GNSS alternative, or complementary, signal.  JPG version.
jpg - 2 MB
Wednesday, January 31, 2018
More Info
Infographic sumarizes the features of STL as a GNSS alternative, or complementary, signal.  PDF version.
pdf - 187 KB
Wednesday, February 7, 2018


pdf - 391 KB
Wednesday, April 12, 2017
More Info
VersaPNT provides virtually failsafe battlefield navigation, even in GPS-denied environments, to protect critical networks with Assured PNT technology.
pdf - 339 KB
Monday, October 9, 2017

Presentations and Articles

More Info
Signals from Global Navigation Satellite Systems (GNSS), such as the Global Positioning System (GPS), are very weak and usually cannot be seen indoors or underground. A common method to overcome the problem of receiving GNSS signals indoors or underground is to use a GPS/GNSS repeater with an antenna located outdoors to receive the GNSS signals and an amplifier/antenna to re-transmit the signal indoors. This paper describes the technologies and methods for creating an intelligent repeater system including time synchronization at the nanosecond, microsecond, and millisecond levels, how each synchronization level affects the overall system and methods for achieving each, power level considerations including power level requirements between zones and how they affect transitions from one zone to another, data transfer and example system configurations. While GPS is primarily demonstrated and tested, the possibility for adding other GNSS constellations such as QZSS, BeiDou, Galileo, and GLONASS are also presented.
pdf - 270 KB
Wednesday, November 18, 2015
More Info
STL is a new satellite-based time and location service for augmenting GPS to combat jamming and spoofing. Its higher power signal opens the possibility to sync indoor synchronization and timing systems without the need for a rooftop antenna system. This content was first presented at several conferences starting in January 2017 including ATIS's Workshop on Time Sync in Financial Markets, "Time & Money" and ION's Precise Time and Time Interval Systems and Applications (PTTI).
pdf - 2 MB
Thursday, January 26, 2017
More Info
BroadShield for SecureSync is an interference detection suite that keeps your GPS/GNSS Synchronization safe from vulnerabilities caused by jamming and spoofing. Developed jointly by Spectracom and Talen-X, it is the only GPS-dependent PNT solution that protects critical infrastructure systems.
pdf - 2 MB
Friday, October 6, 2017
More Info

This article was originally presented at the 2014 PTTI conference. It describes various approaches to a disciplining algorithm to detect and mitigate the effect of GNSS spoofing on precision time signals.

pdf - 914 KB
Monday, December 1, 2014
More Info

Slides from the GPS World webinar “Defense PNT in Challenged Environments” hosted on June 21, 2018, and presented by Jon Fischer and Jon Sinden. This webinar discusses the reliance of GPS in modern land-warfare systems, the potential effects of GPS disruption on their operation and considerations for protecting their ability to continue operating in a GPS-disrupted environment. View the slides presented by Orolia or click here to register and watch the webinar on demand.

pdf - 663 KB
Wednesday, July 18, 2018
pdf - 2 MB
Wednesday, November 29, 2017

Success Stories

More Info
A customer with a major datacenter facility was experiencing issues with GNSS interference affecting its timing systems.  This case study describes the solution, using a low-cost anti-jam antenna.
pdf - 743 KB
Friday, April 20, 2018
pdf - 2 MB
Wednesday, March 22, 2017

System Diagrams

More Info
A graphical representation of approaches to references for position, navigation and timing
pdf - 597 KB
Saturday, September 26, 2015

Technical Notes and Briefs

More Info
Product Brief describing eLoran as a SecureSync timing reference.
pdf - 784 KB
Friday, July 15, 2016

White Papers

More Info
Positioning, navigation and timing (PNT) services are indispensable, and providing trusted, resilient PNT solutions requires us to look beyond individual systems and methodologies to focus upon the user. An architecture that can meet this demand must include multiple systems with diverse technologies so that any single threat or source of disruption can be mitigated. This document discusses how signaling technologies such as GNSS, eLoran and STL are the complementary components of this architecture.
pdf - 583 KB
Wednesday, May 9, 2018
More Info
Today's time sensitive networks rely on available and accurate positioning, navigation and timing (PNT) signals to provide leaders with the information required to make timely and effective decisions. The proliferation of GNSS-degrading and denying devices across state and non-state actors put this critical information capability in jeopardy. Learn how a combination of alternative PNT signals with traditional GNSS references makes PNT applications resilient against jamming and spoofing.
Offisite File
Friday, May 11, 2018
More Info
This Orolia Tech Brief explores the basic steps for maintaining security using a network-connected time server and looks at different ways to achieve resiliency in PNT. As an example, we will start with our SecureSync® Time Server product line to demonstrate how to maintain security with this network-connected device.
pdf - 351 KB
Friday, February 22, 2019
More Info
Military communications and intelligence-collection functions, traditionally associated with fixed sites and large platforms, are being pushed to tactical vehicles and sophisticated Unmanned Autonomous Vehicles (UAVs). This results in more C5ISR systems being installed on mobile platforms. Whether in the air, on land, or at sea, these vehicles will impart shocks and vibrations to their electronics, sometimes severely. In high vibration environments, the system designer must account for induced phase noise which can drastically affect overall performance. This white paper discusses the challenges of keeping low noise signals pure in any environment.
pdf - 903 KB
Wednesday, August 22, 2018