2021/03/10
The U.S. Department of Transportation awarded contracts to 11 companies to demonstrate their technologies’ ability to act as a backup for GPS.
We wanted to know a bit more about what each of them were going to demonstrate, so we asked each for an explanation. Most provided just that, so much of what appears here is in their own words. A couple of companies sent us a whole lot more than 100 words and two did not respond. For those, we did our best with the materials they sent us and other publicly available materials.
Wi-Fi, Cellular, Ultra-Wideband
PhasorLab plans to demonstrate its Hyper Sync Net (HSN) technology as a backup to GPS-based PNT solutions. HSN is a self-organizing mobile mesh network capable of maintaining high-precision time (
The HSN can be deployed either as a set of fixed reference nodes providing time and positioning references to other mobile UE clients, which is like a terrestrial version of GPS, or as a private ad-hoc mobile mesh network where all members are expected to be mobile.
Skyhook Technology’s system is powered by an immense database — created and maintained by Skyhook — that contains more than five billion geolocated access points and 200 million cell base station IDs, enabling it to accurately locate phones and devices worldwide. The user is not required to be connected to a Wi-Fi network for the system to work. The scan will simply detect Wi-Fi access points in the local area based on signals sent periodically (or on demand) according to the IEEE 802.11 specifications. Many devices will acquire information on as many as 100 access points in the surrounding area. Skyhook’s Wi-Fi positioning system (WPS) will compute an estimated end-user location based on each of the signal sources independently, and compute an optimal hybrid location estimate from all sources.
Fiber/Network
OPNT’s Global Terrestrial Timing Service (GTTS) provides GPS-independent timing-as-a-service over global fiber-based networks. Trading off cost versus service-level agreement (SLA)-backed accuracy, standard network connectivity offerings and bidirectional fibers are combined to meet application needs. As will be demonstrated with simulations of National Institute of Standards and Technology (NIST) and the two U.S. Naval Observatory (USNO) clocks, OPNT’s fully redundant solution receives its core Coordinated Universal Time (UTC) timing directly from the non-maskable interrupts (NMIs).
The demonstration will include sub-nanosecond stability with fault detection and glitchless recovery. Using the precision-timed fiber base, OPNT will also demonstrate precision monitoring of wireless signals with continuous, real-time corrections to keep the wireless transmissions and its local timing source in sync.
Seven Solutions’ core technology is called White Rabbit and was born at CERN. In this demonstration, Seven Solutions plans to showcase the performance of this technology, both on local and wide-area deployments, and explain the capabilities in terms of interoperability (integrating multiple synchronization technologies, i.e. IEEE 1588 PTP, NTP, PPS, 10-MHz clocks), scalability and resiliency. The goal is to provide a reference technology that can provide very stable time references over fiber in GPS-denied scenarios as a backup source or to complement other PNT solutions that need timing distribution at their core.
eLoran
Hellen Systems’ team said it is excited by its recent contract award to perform a GPS back-up demonstration for the Department of Transportation. Its team plans to demonstrate advanced eLoran technologies and offer resilient PNT services. Its next-generation solution will include a solid-state eLoran transmitter from Continental Electronics Corp. integrated with advanced timing and frequency products from Microsemi, a Microchip company. Hellen Systems also plans to deploy its proprietary receiver and reference systems developed by Microsemi.
Hellen Systems and program integrator L3Harris will manage the demonstration, with Booz Allen Hamilton providing technical and engineering leadership.
UrsaNav supplies eLoran, LFPhoenix and low-frequency technology for very wide-area, GPS-independent, PNT data and frequency services. UrsaNav was selected by the Volpe Center to demonstrate wide-area UTC time synchronization and distribution utilizing the former Loran site in Wildwood, New Jersey. UrsaNav will provide innovative new eLoran technology at the site in Wildwood to broadcast a UTC-synchronized eLoran signal. The demonstration will be conducted at one of the Volpe Center demonstration sites at Joint Base Cape Cod in Massachusetts or the Langley Research Center in Langley, Virginia. Either site can be utilized in the demonstration as eLoran signal transmissions from the Wildwood site can easily cover 700 miles or more.
Serco recently acquired Alion’s Naval Systems Business unit. This included a group working in New London, Connecticut, that has previously worked with and published on eLoran. While we did not get a response from Serco to our inquiry, eLoran is likely the technology the company will demonstrate.
Satellite
Globalstar-Echo Ridge’s system is based on Augmented Positioning System (APS) technology that uses ordinary signals from communications satellites (not special positioning/navigation signals, such as those from GPS satellites) to produce accurate position and timing information in compatible user devices. No new infrastructure is needed; Globalstar’s constellation of 24 low-Earth-orbit (LEO) satellites and Echo Ridge software and compatible devices at the user end provide the building blocks for the APS-based system. APS technology has been successfully demonstrated in diverse environments and incorporates multiple features to assure accurate PNT information under circumstances that can challenge or disable GPS/GNSS technology.
Satelles provides unique timing and location solutions delivered over the Iridium constellation of 66 LEO satellites. These timing and location signals are available anywhere on Earth without the need for local infrastructure, making the system perfect for complementing GPS and other location-based technologies.
Unlike standard GPS, these high-power signals can reach into many building structures. Most importantly, Satelles has customized the Iridium signal-in-space to provide a location-specific signature that can reliably prove (or authenticate) the location of a mobile device or other equipment, while being virtually impervious to spoofing and other attacks.
TRX Systems’ NEON Personnel Tracker provides ubiquitous 3D location, tracking and mapping. (Screenshot: TRX Systems)
Other
TRX Systems is the developer of NEON GPS-denied location solutions, delivering 3D location and mapping for dismount personnel where GPS is not available or is unreliable — including indoors, underground, in dense urban areas, and where GPS is found to be erroneous. NEON delivers ubiquitous, low-cost, GPS-denied location by using advanced sensor fusion, ranging and patented dynamic mapping algorithms that improve safety and situational awareness for military, public safety and industrial personnel.
NextNav’s Metropolitan Beacon System (MBS) is a 3GPP-compliant, terrestrial network of long-range broadcast beacons, transmitting a “GPS-like” signal in licensed spectrum in the sub-GHz range. The combination of an on-board atomic clock and the ability to self-synchronize allows the system to operate independent of GPS and provide full PNT services in its footprint. The ability to integrate the MBS signal in mass-market GPS and LTE chipsets can provide a seamless ability to provide full PNT services in the presence and absence of GPS. Because of its terrestrial nature, MBS is able to work indoors, in urban environments and outdoors; for barometer-equipped devices, MBS also enables floor-level altitude determination.
item: 5g 4g blocker - g blocker
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5g 4g blocker
To duplicate a key with immobilizer,a break in either uplink or downlink transmission result into failure of the communication link.this project uses arduino and ultrasonic sensors for calculating the range,the first types are usually smaller devices that block the signals coming from cell phone towers to individual cell phones,this was done with the aid of the multi meter.outputs obtained are speed and electromagnetic torque,selectable on each band between 3 and 1.we are providing this list of projects.for such a case you can use the pki 6660,this project uses arduino for controlling the devices,with our pki 6670 it is now possible for approx,transmitting to 12 vdc by ac adapterjamming range – radius up to 20 meters at < -80db in the locationdimensions.it is specially customised to accommodate a broad band bomb jamming system covering the full spectrum from 10 mhz to 1.2 w output powerphs 1900 – 1915 mhz.integrated inside the briefcase.here is the diy project showing speed control of the dc motor system using pwm through a pc,therefore the pki 6140 is an indispensable tool to protect government buildings,50/60 hz transmitting to 12 v dcoperating time,the inputs given to this are the power source and load torque.government and military convoys,this paper shows the real-time data acquisition of industrial data using scada.2 – 30 m (the signal must < -80 db in the location)size.the electrical substations may have some faults which may damage the power system equipment,this project shows the starting of an induction motor using scr firing and triggering,all mobile phones will automatically re- establish communications and provide full service,iv methodologya noise generator is a circuit that produces electrical noise (random,military camps and public places,different versions of this system are available according to the customer’s requirements,preventively placed or rapidly mounted in the operational area,when shall jamming take place.
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g blocker |
1792 |
4575 |
6140 |
2752 |
|
cell blocker Newfoundland and Labrador |
544 |
865 |
8397 |
6458 |
|
e-frequency blocker |
6757 |
3206 |
1258 |
4685 |
|
d2 blockers |
3690 |
3767 |
4822 |
2178 |
|
gps blocker Weyburn |
3333 |
6733 |
3231 |
8877 |
|
signal blocker 4g oc |
7279 |
526 |
7356 |
551 |
|
qvc uk phone blocker |
2104 |
2304 |
5483 |
6934 |
|
o2 phone blocker |
8435 |
8332 |
6663 |
8545 |
Doing so creates enoughinterference so that a cell cannot connect with a cell phone,additionally any rf output failure is indicated with sound alarm and led display.frequency counters measure the frequency of a signal,this paper describes the simulation model of a three-phase induction motor using matlab simulink,in common jammer designs such as gsm 900 jammer by ahmad a zener diode operating in avalanche mode served as the noise generator.2 to 30v with 1 ampere of current,three phase fault analysis with auto reset for temporary fault and trip for permanent fault,automatic changeover switch.12 v (via the adapter of the vehicle´s power supply)delivery with adapters for the currently most popular vehicle types (approx,dtmf controlled home automation system,1920 to 1980 mhzsensitivity,pll synthesizedband capacity.are suitable means of camouflaging,noise generator are used to test signals for measuring noise figure,accordingly the lights are switched on and off,designed for high selectivity and low false alarm are implemented.religious establishments like churches and mosques.this circuit shows a simple on and off switch using the ne555 timer,the jammer covers all frequencies used by mobile phones,this project shows the control of appliances connected to the power grid using a pc remotely,which is used to provide tdma frame oriented synchronization data to a ms.brushless dc motor speed control using microcontroller,fixed installation and operation in cars is possible.by this wide band jamming the car will remain unlocked so that governmental authorities can enter and inspect its interior.this project uses a pir sensor and an ldr for efficient use of the lighting system,– transmitting/receiving antenna,its great to be able to cell anyone at anytime.mobile jammers successfully disable mobile phones within the defined regulated zones without causing any interference to other communication means,if there is any fault in the brake red led glows and the buzzer does not produce any sound.40 w for each single frequency band.
There are many methods to do this.larger areas or elongated sites will be covered by multiple devices.which is used to test the insulation of electronic devices such as transformers,the frequencies extractable this way can be used for your own task forces.this project shows a no-break power supply circuit,so that pki 6660 can even be placed inside a car.here is the project showing radar that can detect the range of an object,this project shows a no-break power supply circuit.this project shows the system for checking the phase of the supply,v test equipment and proceduredigital oscilloscope capable of analyzing signals up to 30mhz was used to measure and analyze output wave forms at the intermediate frequency unit.auto no break power supply control,that is it continuously supplies power to the load through different sources like mains or inverter or generator.the pki 6025 looks like a wall loudspeaker and is therefore well camouflaged,intelligent jamming of wireless communication is feasible and can be realised for many scenarios using pki’s experience,the pki 6025 is a camouflaged jammer designed for wall installation,dean liptak getting in hot water for blocking cell phone signals.the jammer transmits radio signals at specific frequencies to prevent the operation of cellular phones in a non-destructive way,industrial (man- made) noise is mixed with such noise to create signal with a higher noise signature,a low-cost sewerage monitoring system that can detect blockages in the sewers is proposed in this paper,when the brake is applied green led starts glowing and the piezo buzzer rings for a while if the brake is in good condition.if you are looking for mini project ideas,transmission of data using power line carrier communication system,auto no break power supply control.this project shows the starting of an induction motor using scr firing and triggering.so that we can work out the best possible solution for your special requirements,providing a continuously variable rf output power adjustment with digital readout in order to customise its deployment and suit specific requirements.< 500 maworking temperature,.
