Simulation solutions for space-based PNT

Rocket Night Sky


Simulation solutions for space-based PNT

Lisa Valencia is a Project Manager and Senior Systems Engineer with a 30-year career at NASA. She is currently providing subject matter expertise to the Space Communications and Navigation (SCaN) Program Office at NASA Headquarters

Trusted Partner to Space Agencies

For over 35 years, Spirent has been chosen by NASA and other space companies to provide leading edge test solutions. Spirent GNSS solutions and expertise will support testing of the GNSS receivers intended to be deployed in NASA’s Artemis program for lunar exploration.

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PNT testing for low earth orbit constellations

GNSS Testing for LEO Constellations

Low Earth Orbit (LEO) satellite constellations are already offering a multitude of benefits, from communications to earth imaging and disaster detection and mitigation. The next generations of LEO constellations will deliver specialized positioning, navigation and timing services to users around the world, high-speed wireless data connections, and open up new opportunities for restricted communications technology. With these great opportunities comes a range of challenges. Spirent solutions are designed to meet the stringent requirements of next-generation technologies, and are perfectly placed to enable your LEO project.

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Earth from Moon NASA

Unrivaled Zero-effective Latency for Hardware-in-the-loop Testing

In 2021, the hardware and software update rate for the Spirent GSS9000 constellation simulator was increased from 1 kHz to 2 kHz, greatly benefitting ultra-high-dynamic space applications. This unmatched simulation iteration rate provides the best precision and realism in global navigation satellite system (GNSS) signal simulation.

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Spirent Federal Assures Space Missions


Extended test scenario duration of 65 days

Mountain Flag

Full performance at ultra-high dynamics

Space Shuttle

Proven realistic recreation of space-specific environments


Flexible over-the-air capability for antenna integration


Proven fidelity with large variance in Doppler shift to varied signal power levels

Cell Tower

Flexible signal capability for developing new signals

Rocket Unrivaled Update Rate

Spirent GNSS Simulator Enhanced with Unrivaled Update Rate and Interference Testing Capabilities

An unrivaled 2 kHz simulation iteration rate provides GSS9000 users with the ability to improve accuracy of simulated trajectories without compromising performance. This is of particular benefit to military high-dynamic applications, such as space missions and hypersonic or spinning missiles.

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GSS9000 Simulation Product


The most powerful PNT/GNSS simulator/test system

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United Launch Alliance Atlas V rocket with SBIRS payload

Spirent Federal Systems Supports Department of Defense and Space Force National Security Mission

Spirent Federal provides high dynamic positioning, navigation, and timing (PNT) testing for the United Launch Alliance's Atlas V rocket, enabling the generation of high-fidelity simulated trajectories.

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