VIAVI unveils second-generation RSR Transcoder for reliable PNT in GPS-denied environments

VIAVI Solutions Inc. has introduced its second-generation RSR Transcoder, engineered to maintain operational capability in GPS/GNSS-denied, degraded or disrupted space operational environments.

This development comes amid a global increase in GPS and GNSS jamming and spoofing, which have become standard tactics in electronic warfare. These hostile activities, while primarily aimed at military operations, also threaten sectors that depend on precise timing and geolocation, such as aviation, communications and emergency services.

The new RSR Transcoder is designed to deliver assured positioning, navigation and timing (PNT) in a wide range of outputs to upgrade legacy systems. The device features a GPS full constellation simulator and employs a patented algorithm to rapidly convert assured inputs — including M-Code, SAASM, IMU/INS, and other signals of opportunity — into universal GPS L1 and L2 signals with both C/A-code and P-code outputs. This capability allows for the straightforward enhancement of older GPS systems, providing them with modern, resilient PNT functionality.

The RSR Transcoder is housed in ruggedized IP68 enclosures suitable for deployment on land, sea and air platforms. It is capable of covert, lights-out operation and offers a 100 Hz output rate with an ICD-GPS-153 interface. The device is available with holdover oscillator options of 4, 8 and 24 hours, supporting continued operation during signal loss.

On Display at the Joint Navigation Conference

The RSR Transcoder will be demonstrated at the 2025 Joint Navigation Conference, which is held June 2-5 in the Greater Cincinnati Area and jointly hosted by the Departments of Defense and Homeland Security. It will be on display at VIAVI’s booth #406. VIAVI’s Inertial Labs division will also demonstrate recent breakthroughs in D3SOE navigation at booth #430. 

VIAVI and its Inertial Labs division will also give three presentations: 

• “3D Vision-Based Positioning for Autonomous Aerial Platform Navigation and Human-in-the-Loop Reconnaissance Mission”: Monday, June 2 at 1:50 PM ET
• “Anti-Jam/Spoof Phased Array Antenna”: Wednesday, June 4 at 10:50 AM ET
• “Retrofitting At-Risk GPS Defense Equipment with a Multi-Orbit LEO and GEO Clock System for Resilient PNT Services”: Wednesday, June 4 at 11:30 AM ET