Exelis Signal Sentry GPS Jamming Detector

Signal Sentry Network detects and locates GPS interference

ITT_EXELIS_IDM_v2 - SignalSentry-Infographic1.pdf
GPS Jamming Detector Testing Successful - GPS Tracklog

“Protecting critical GPS infrastructure is extremely important for public safety,” said Mark Pisani, vice president and general manager of positioning, navigation and timing for Exelis. “With Signal Sentry, we can identify a jammer located in a moving vehicle up to 10-meter (32.8 feet) accuracy.”
The Signal Sentry 1000 is designed to work with the U.S. GPS system and dates for actual release have not been set. The device has, however, been showcased at the ION CNSS+ conference in Tampa, Fla. all this week. While this device is actually designed primarily for commercial use, the technology will no doubt be scaled down to consumer products in the coming years.

Exelis boasts of its GPS signal interference product
Exelis successfully tests GPS threat detection product
As part of the Exelis ISR and Analytics strategic growth platform, Exelis will showcase Signal Sentry in booth #619/621 at the ION GNSS+ conference Sept. 8-12 in Tampa, Fla.

Exelis Signal Sentry Test Locates GPS Jamming Threats : GPS World

Signal Sentry 1000 technology is a network of threat-detection sensors, which is part of a centralized server executing Exelis-developed proprietary location algorithms. These sensors can be strategically located around different types of critical infrastructure, such as shipping ports, utilities and government facilities to automatically sense and locate any intentional or unintentional GPS jamming source. Should a threat be detected, users would receive location information and actionable intelligence in order to determine an interference-mitigation plan.
“Exelis developed Signal Sentry 1000 to help protect critical infrastructure and to deliver intelligence to law enforcement operations that depend upon GPS availability,” said Mark Pisani, vice president and general manager of precision instruments and positioning, navigation and timing for Exelis Geospatial Systems. “Achieving this field test milestone proves that our detection technology works. The next step is to evolve this technology for our military customers.”

 

GPS Interference Detection & Mitigation - auerbach2.pdf 

DHS IDM Summary for Public Release _01 April 2008-public-summary.pdf 
 
ABSTRACT - GPS Interference Detection and Identification Using Multicorrelator Receivers.pdf

Interference is among the most feared events in civil aviation use of GNSS. A large number of techniques were designed to alleviate the sensitivity of modern receivers to this perturbation. Most of these techniques are either based on spatial discrimination like adaptive antennas, on spectral selectivity such as notch filters or on amplitude detection. The advent of multicorrelator receivers widens the range of post- correlation methods that can be considered to tackle this problem. In particular, this enables the characterization of interference effects on the tracking loops through the analysis of the shape of the correlation peak.

ANALYSIS OF POTENTIAL INTERFERENCE SOURCES AND ASSESSMENT OF PRESENT SOLUTIONS FOR GPS/GNSS RECEIVERS_Peter97.pdf

Many experiments are presently being carried out on the future DGPS-based approach and landing systems to improve the quality of aircraft navigation. The use of C/A-code receivers for aeronautical applications requires high reliability and integrity. This study is an investigation of the potential sources of electromagnetic interference for the Standard Positioning Service of the GPS receivers using the C/A code and navigating inside an avionic environment. Radio-frequency emissions from several communication systems using frequencies adjacent to the GPS and GLONASS bands present considerable problems for the GNSS reception. An overcrowded frequency spectrum and weak GPS signals make RF interference from a variety of sources a potential threat that must be examined with care.

This paper intends to give an overview of the potential sources of interference and their solutions. These sources of RFI are identified, and the vulnerability of GPS and GNSS to that interference is assessed. The study procures a quantitative comprehension of the impact of interference. The most important sources of interference are studied in terms of their technical characteristics, their jamming distance and the isolation or the rejection requirements needed to keep the good performance of the receiver. Candidate mitigation techniques are also examined, and selected techniques are recommended for adoption in appropriate standards.