Defense against multiple simultaneous jammers

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GAJR GNSS Anti-Jamming Receiver

the best satellite navigation system on the anti-jamming market


All in one device with GNSS Receiver and Antenna Array

The ultimate GNSS anti-jamming solution


Low cost jammer protection for Network Time Protocol Server, all manned and unmanned air/ sea / land platforms 

Ideal for retrofitting

Provides anti-jam protection in dynamic multi jammer scenarios

Digital interface with UAV System


GLONASS L1/L2 + GPS L1/L2 + BeiDou B1/B2 + Galileo E1/E5 + (NavIC L5 for order) satellite system calculating

All-in-view navigation using proven

Standalone Position Accuracy < 2.0 m

Up to 110 dB of additional anti-jamming protection

Adaptive digital nulling

Intelligent Transportation Systems, Network Time Protocol Systems, Railways networks, Airports and Air-Traffic Control facilities, Electric Sub-Stations, Military Communications, Power Distribution and Transmission companies, Oil and Gas Utilities,3G and LTE service providers, Autonomous Vehicles make extensive use of GNSS (Global Navigation Satellite System including GLONASS/GPS/Galileo/BeiDou/NavIC)technology and this dependence will only grow in the future. It’s not just that GNSS has become ubiquitous in our daily life, but many critical infrastructures worldwide have some sort of reliance on it. GNSS plays a significant role in synchronization in the power grid, high frequency trading operations, and synchronization of distant wireless communications towers. This growing dependence on GNSS within critical (and non-critical) infrastructures has posed some concerns on the potential vulnerabilities of GNSS. As a consequence, there is a need for protecting GNSS against intentional and unintentional interference sources since disruption of GNSS can lead to catastrophic consequences. The jamming threat, a specific form of intentional interference, is real and its occurrence has been documented in many occasions. Jamming devices are illegal in most (not all) countries, yet they are very easy and cheap to buy. Simple jammers can disrupt GNSS-based services in wide geographical areas (even in several kilometers), a fact that has certainly triggered research into anti-jamming techniques. Not only is jamming a threat, but other sources of unintentional interference can severely compromise GNSS performance.

The jamming of signals and frequencies seems so farfetched, even in today’s world, that many don’t understand the importance of this kind of technology. GNSS has become integral to the navigation and planning systems of many military and civilian devices. There exists technology today that can prevent devices from receiving GNSS signals from the satellites. In a military situation and unmanned ground vehicles or UAV, this can mean everything, as so many vehicles are equipped with GNSS devices that will not run without receiving the signal from the GLONASS/GPS/Galileo/BeiDou.

The global positioning system (GPS) was originally developed for military purposes and has proven to be essential for land, air, and sea navigation as well as for the accurate positioning for a wide range of military applications. Also, the use of anti-jamming systems and technology with GPS receivers and antennas helps prevent the jamming of signals. Therefore, the high demand for GPS and GNSS devices in military applications is driving the growth of the anti-jamming market for GPS. The ongoing developments in this technology are likely to enhance coverage and reliability. The increased penetration of the GPS technology in a wide array of applications is expected to be driven by coverage enhancements.

The development and production of anti-jamming technology is limited to a very specific, closed market sector with a particularly high cost of admission. Worldwide, only about 5-6 companies work with this technology. SMA PROGRESS,LLC GNSS Anti-Jamming Technology addresses the needs of Navigation Warfare, including Electronic Protection, Electronic Support and Electronic Attack. This GAJR equipment ensures continuous positioning even in the face of interference and jamming.


OEM GAJR-5 GNSS Anti-Jamming Receiver

Use of GPS Timing in Critical Infrastructure

Terrorists seek to destroy, incapacitate, or exploit critical infrastructure and key resources across the United States to threaten national security, cause mass casualties, weaken our economy, and damage public morale and confidence.
America's open and technologically complex society includes a wide array of critical infrastructure and key resources that are potential terrorist targets. The majority of these are owned and operated by the private sector and State or local governments. These critical infrastructures and key resources are both physical and cyber-based and span all sectors of the economy.
Critical infrastructure and key resources provide the essential services that underpin American society. The Nation possesses numerous key resources, whose exploitation or destruction by terrorists could cause catastrophic health effects or mass casualties comparable to those from the use of a weapon of mass destruction, or could profoundly affect our national prestige and morale. In addition, there is critical infrastructure so vital that its incapacitation, exploitation, or destruction, through terrorist attack, could have a debilitating effect on security and economic well-being.
While it is not possible to protect or eliminate the vulnerability of all critical infrastructure and key resources throughout the country, strategic improvements in security can make it more difficult for attacks to succeed and can lessen the impact of attacks that may occur.

Source: Homeland Security Presidential Directive 7

There are 16 critical infrastructure sectors whose assets, systems, and networks, whether physical or virtual, are considered so vital to the United States that their incapacitation or destruction would have a debilitating effect on security, national economic security, national public health or safety, or any combination thereof.


The Transportation Systems Sector consists of seven key subsectors, or modes:

Aviation includes aircraft, air traffic control systems, and about 19,700 airports, heliports, and landing strips. Approximately 500 provide commercial aviation services at civil and joint-use military airports, heliports, and sea plane bases. In addition, the aviation mode includes commercial and recreational aircraft (manned and unmanned) and a wide-variety of support services, such as aircraft repair stations, fueling facilities, navigation aids, and flight schools.

Highway and Motor Carrier encompasses more than 4 million miles of roadway, more than 600,000 bridges, and more than 350 tunnels. Vehicles include trucks, including those carrying hazardous materials; other commercial vehicles, including commercial motorcoaches and school buses; vehicle and driver licensing systems; traffic management systems; and cyber systems used for operational management.
Maritime Transportation System consists of about 95,000 miles of coastline, 361 ports, more than 25,000 miles of waterways, and intermodal landside connections that allow the various modes of transportation to move people and goods to, from, and on the water.

Mass Transit and Passenger Rail includes terminals, operational systems, and supporting infrastructure for passenger services by transit buses, trolleybuses, monorail, heavy rail—also known as subways or metros—light rail, passenger rail, and vanpool/rideshare. Public transportation and passenger rail operations provided an estimated 10.8 billion passenger trips in 2014.

Pipeline Systems consist of more than 2.5 million miles of pipelines spanning the country and carrying nearly all of the nation's natural gas and about 65 percent of hazardous liquids, as well as various chemicals. Above-ground assets, such as compressor stations and pumping stations, are also included.
Freight Rail consists of seven major carriers, hundreds of smaller railroads, over 138,000 miles of active railroad, over 1.33 million freight cars, and approximately 20,000 locomotives. An estimated 12,000 trains operate daily. The Department of Defense has designated 30,000 miles of track and structure as critical to mobilization and resupply of U.S. forces.

Postal and Shipping moves about 720 million letters and packages each day and includes large integrated carriers, regional and local courier services, mail services, mail management firms, and chartered and delivery services.

The energy infrastructure

The energy infrastructure is divided into three interrelated segments: electricity, oil, and natural gas. The U.S. electricity segment contains more than 6,413 power plants (this includes 3,273 traditional electric utilities and 1,738 nonutility power producers) with approximately 1,075 gigawatts of installed generation. Approximately 48 percent of electricity is produced by combusting coal (primarily transported by rail), 20 percent in nuclear power plants, and 22 percent by combusting natural gas. The remaining generation is provided by hydroelectric plants (6 percent), oil (1 percent), and renewable sources (solar, wind, and geothermal) (3 percent). The heavy reliance on pipelines to distribute products across the nation highlights the interdependencies between the Energy and Transportation Systems Sector. The reliance of virtually all industries on electric power and fuels means that all sectors have some dependence on the Energy Sector. The Energy Sector is well aware of its vulnerabilities and is leading a significant voluntary effort to increase its planning and preparedness. Cooperation through industry groups has resulted in substantial information sharing of best practices across the sector. Many sector owners and operators have extensive experience abroad with infrastructure protection and have more recently focused their attention on cybersecurity.

Source: U.S. The Department of Homeland Security (US DHS)


AJS-1 Anti-Jamming NTP Server

AJS-1 NTP Server is a high precision multi-service, time and frequency synchronization solution which can be used to provide ITU-T, G.811 Primary Reference Clocks which are referenced to a GNSS or GPS source, as well as to synchronize the time-of-day and frequency across multiple nodes of the network. AJS-1 GNSS or GPS Primary Reference (PRC) Clock is specifically designed for he synchronization of 2G, 3G,HetNet and LTE mobile telecommunications networks as well as backhaul wire-line SDH / SONET and Synchronous Ethernet networks. It may be also used by Railways, Airports (including airtraffic control), Power generation and distribution companies and other Utility companies who not only require a highly precise timeof-day and G.811 frequency synchronization locked to a GPS Reference but who also need to distribute highly precise time-ofday and frequency synchronization across all nodes of their networks. The AJS-1 is always locked to a GPS reference to provide multiple G.811 / Stratum 1 quality frequency and time-of-day (IRIG-B and NTP) outputs. The AJS-1 is also equipped highly accurate, low-noise OCXO / Rubidium oscillator which provides a high stability holdover clock that is typical of a Network SSU in the event of the GPS signal or its antenna failure.

Anti-Jamming NTP Server Applications

Synchronizing Cellular networks like UMTS, GPRS, 3G and LTE
Power generation and distribution companies and other utility companies
Wireless and Wireline Telecom synchronization
Distributing Time (ToD) and Frequency reference for power utilities across all nodes of the network
Synchronization of Defense Networks
Synchronizing airports and aviation communications
Synchronizing railway signaling networks and railway communications
Synchronizing traffic management
Broadcasting Network and Broadcast equipment synchronization.

Vendor Links



Problem Time Synchronization in the Electric Power System

The power system uses precision timing for grid monitoring and situational awareness, to coordinate the operation and integration of a variety of grid assets, and for grid protection and operation. Because power systems are so large and often geographically separated, power data acquisition systems need to share a common time source. In some advanced applications, clocks need to be precisely synchronized to a common reference to enable the integration of diverse data types and sources and assure that decentralized, parallelized analysis and control actions are effectively coordinated and implemented. Broadly speaking, information about time is used to understand how relationships and conditions change over time, to identify and understand specific events (whether an individual lightning strike or the sequence of events for a system collapse), and to understand dynamic and transient grid events. Power system owners and operators use primarily the Global Positioning System (GPS) as the source for timing and determining asset position. Today, GPS disruptions complicate (with higher cost, longer duration, and lower efficiency) but do not kill grid operations. For mission-critical time-synchronized applications in the future, however, GPS and alternate time sources (and the ways they are delivered and used) will need to become more reliable.

Problems caused by natural, accidental, or malicious radio interference cause significant concerns about the reliability and accuracy of satellite-based timing delivery systems (i.e., GNSS). Perhaps the most common cause of GPS problems is poor antenna installation, which can be prevented by using best practices for installation. Terrestrial or space-based interference can prevent the clean, accurate receipt of satellite signals at a GNSS receiver, and intentional spoofing can substitute false timing information to a receiver in lieu of the original, accurate signal. But the absence of a timing signal or the receipt of an inaccurate signal can cause systems such as synchrophasor networks to lose needed data or to act inappropriately on the false data received. In some extreme cases, this could cause operational problems for the electric grid.



SMA PROGRESS Company profile

SMA PROGRESS provides turnkey engineering and design, procurement, installation and maintenance for complete navigations needs Army - everything from Enhanced Position Location and Reporting System to navigation equipment, anti-jamming technology and more. SMA PROGRESS,LLC offers superior products to the anti-jamming technology marketplace. Our mission is to provide the finest equipment coupled with excellent before and after sale service. Our staff of dedicated professionals, based in Russia, Moscow, represents over 10 years of collective experience in design, manufacturing and sales of precision time and anti-jamming products.

The development and production of anti-jamming technology is limited to a very specific, closed market sector with a particularly high cost of admission. Worldwide, only about 5-6 companies work with this technology. World leaders include the U.S./Canada companies Rockwell Collins, Mayflower Communications Company, NovAtel; Raytheon; the British company BAE Systems; the France company Thales; the England company Cobham Antenna Systems; and also the Russian SMA PROGRESS,LLC. The latter is the leading Russian developer and manufacturer of anti-jamming technology.



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For more information, please contact:


4a Fadeeva Street, Balashikha City, Moscow Area, Post Box 56, 143000, Russian Federation.

Tel: +7 (495) 506 3252,