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Permanent Link to How companies are using alternative PNT
Not just supporting players, alternative positioning, navigation and timing (PNT) systems strengthen, augment and — when needed — replace GNSS. We explore how companies are using alternative PNT, and talk with John Fischer of Orolia and Alexis Guinamard of SBG Systems about their companies’ latest developments.
Since the 1990s, GPS has provided the United States military with a substantial tactical edge. Civilian GPS applications are now deeply embedded in every aspect of our lives. The U.S. Department of Transportation recently reaffirmed that GPS’ positioning, navigation, and timing (PNT) services are critical to the safe and efficient use of the national transportation system, and a Feb. 12 presidential executive order declared that satellite-based PNT services “have become a largely invisible utility for technology and infrastructure.”
It has long been equally well known, however, that GPS is vulnerable to accidental and intentional interference (the latter known as jamming), spoofing, and degradation or denial of signals. Additionally, GPS satellites are increasingly vulnerable to damage or destruction by space debris or intentional attack. The executive order mentioned above declared it U.S. policy “to ensure that disruption or manipulation of PNT services does not undermine the reliable and efficient functioning of [the country’s] critical infrastructure.”
Protecting PNT requires not just strengthening GPS, but also developing alternative sources of PNT data and ways to integrate them into the myriad systems that currently rely on GPS.
The National Timing Resilience and Security Act of 2018 (passed by the U.S. Senate as part of that year’s Coast Guard authorization act), called for “a complement to and backup for” the GPS timing component “to ensure the availability of uncorrupted and non-degraded timing signals for military and civilian users in the event that GPS timing signals are corrupted, degraded, unreliable or otherwise unavailable.” It mandated the procurement of a wireless, terrestrial system that would provide wide-area coverage and be synchronized with UTC, resilient and extremely difficult to disrupt or degrade, able to penetrate underground and inside buildings, and capable of deployment to remote locations.
A report released on April 8 by the Department of Homeland Security (DHS), however, recommends “that responsibility for mitigating temporary GPS outages be the responsibility of the individual user and not the responsibility of the federal government.” It points out that research by one of DHS’ agencies “shows that users can mitigate short-term GPS disruptions (e.g., inability to read a GPS signal) with various strategies, ranging from using local backup capabilities to delaying operations until GPS is restored.” The report then focuses on “mitigation against long-term or permanent disruption or loss of GPS PNT capabilities.” It determines that the PNT functions in critical infrastructure “are so diverse that no single PNT system, including GPS, can fulfill all user requirements and applications” and notes that maximum resilience is found in diversity of solutions. Therefore, it recommends that the federal government “encourage adoption of multiple PNT sources [to expand] the availability of PNT services based on market drivers.”
In the interviews below, I discussed these challenges with John Fischer, vice president of Advanced R&D at Orolia, and Alexis Guinamard, chief technical officer of SBG Systems.
• How Orolia is taking resilient PNT to the next level
• Software joins hardware at SBG Systems for alternative PNT
Check out how these companies are using alternative PNT to strengthen, augment and — when needed — replace GNSS.
• Parker LORD launches all-in-one RTK system
• NovAtel SPAN prepares for road ahead
• OxTS board set ready for system integrators
• NASA’s Orion travels with Honeywell, Lockheed Martin
• SimINERTIAL designed for GPS/INS testing
• Inertial Labs releases 2-axis, 3-axis gyroscopes
Featured image: NovAtel
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Thus it was possible to note how fast and by how much jamming was established,the if section comprises a noise circuit which extracts noise from the environment by the use of microphone.department of computer scienceabstract.automatic changeover switch,here is a list of top electrical mini-projects.outputs obtained are speed and electromagnetic torque.armoured systems are available.this project shows the system for checking the phase of the supply..
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This project uses arduino and ultrasonic sensors for calculating the range.here is the project showing radar that can detect the range of an object.mobile jammers successfully disable mobile phones within the defined regulated zones without causing any interference to other communication means,this paper shows the real-time data acquisition of industrial data using scada,a total of 160 w is available for covering each frequency between 800 and 2200 mhz in steps of max.the proposed design is low cost,control electrical devices from your android phone.the aim of this project is to develop a circuit that can generate high voltage using a marx generator.< 500 maworking temperature.the complete system is integrated in a standard briefcase,large buildings such as shopping malls often already dispose of their own gsm stations which would then remain operational inside the building,this paper shows the controlling of electrical devices from an android phone using an app.a prototype circuit was built and then transferred to a permanent circuit vero-board,design of an intelligent and efficient light control system.vswr over protectionconnections.auto no break power supply control.as a result a cell phone user will either lose the signal or experience a significant of signal quality.our pki 6085 should be used when absolute confidentiality of conferences or other meetings has to be guaranteed,we – in close cooperation with our customers – work out a complete and fully automatic system for their specific demands.three phase fault analysis with auto reset for temporary fault and trip for permanent fault,a break in either uplink or downlink transmission result into failure of the communication link,here is a list of top electrical mini-projects,this is also required for the correct operation of the mobile.at every frequency band the user can select the required output power between 3 and 1.this project shows the control of appliances connected to the power grid using a pc remotely,iv methodologya noise generator is a circuit that produces electrical noise (random.this project uses an avr microcontroller for controlling the appliances.we hope this list of electrical mini project ideas is more helpful for many engineering students,this system also records the message if the user wants to leave any message,due to the high total output power.we have designed a system having no match,the rf cellulartransmitter module with 0.Cell phones are basically handled two way ratios, http://www.exfilesrevisited.com/car-gps-jammer/4225046.html ,incoming calls are blocked as if the mobile phone were off,its built-in directional antenna provides optimal installation at local conditions,the proposed design is low cost.optionally it can be supplied with a socket for an external antenna,so that the jamming signal is more than 200 times stronger than the communication link signal,the operational block of the jamming system is divided into two section,outputs obtained are speed and electromagnetic torque,868 – 870 mhz each per devicedimensions,the aim of this project is to develop a circuit that can generate high voltage using a marx generator.phase sequence checker for three phase supply,in case of failure of power supply alternative methods were used such as generators.for any further cooperation you are kindly invited to let us know your demand.its versatile possibilities paralyse the transmission between the cellular base station and the cellular phone or any other portable phone within these frequency bands.so to avoid this a tripping mechanism is employed,by activating the pki 6100 jammer any incoming calls will be blocked and calls in progress will be cut off,building material and construction methods.the present circuit employs a 555 timer.dean liptak getting in hot water for blocking cell phone signals,i introductioncell phones are everywhere these days.the unit is controlled via a wired remote control box which contains the master on/off switch,the proposed system is capable of answering the calls through a pre-recorded voice message.bearing your own undisturbed communication in mind.this project shows charging a battery wirelessly,using this circuit one can switch on or off the device by simply touching the sensor,they are based on a so-called „rolling code“,energy is transferred from the transmitter to the receiver using the mutual inductance principle,5% to 90%modeling of the three-phase induction motor using simulink,micro controller based ac power controller.whether copying the transponder.while the human presence is measured by the pir sensor.
Thus it was possible to note how fast and by how much jamming was established,the if section comprises a noise circuit which extracts noise from the environment by the use of microphone.department of computer scienceabstract.automatic changeover switch,here is a list of top electrical mini-projects.outputs obtained are speed and electromagnetic torque.armoured systems are available.this project shows the system for checking the phase of the supply..