NASA has successfully tested a new communications system that allows spacecraft to switch between different satellite networks instead of relying on just one. The technology, called the Polylingual Experimental Terminal (PExT), completed its main demonstration objectives in late 2025 and is now moving into an extended testing phase.
For decades, most spacecraft have operated using a single communications network throughout their missions. That approach works, but it can limit flexibility when data needs to be sent back to Earth. Launched on July 23, 2025, aboard York Space Systems’ BARD spacecraft, PExT was built to demonstrate how wideband communications technology can connect with multiple relay systems using the Ka-band spectrum.
The project is managed by NASA’s Space Communications and Navigation (SCaN) Program and supports the agency’s efforts to develop more versatile communications options for future missions.
PExT Successfully Connects Through Multiple Space Networks
The mission reached a major milestone in December 2025 when PExT completed its primary technology demonstration. According to a NASA statement, the terminal successfully transmitted data back to Earth through the agency’s Tracking and Data Relay Satellite system as well as commercial networks operated by Viasat and SES Space & Defense.
That may sound technical, but the idea is fairly simple. Instead of being locked into a single communications provider, a spacecraft equipped with this type of technology can work across different networks. The demonstration was designed to show exactly that. Using the widely adopted Ka-band frequency range, PExT proved it could communicate through both government-operated and commercial systems.
NASA considers the result an important step toward creating a more connected communications environment in space. After the successful test campaign, the agency decided to continue the mission. Extended operations began in January 2026 and are scheduled to run through April 2027.
Direct Contact With Earth Tested
The next phase of the mission is expanding beyond relay satellites. The U.S Space Agency is now conducting demonstrations that involve direct communications between the spacecraft and ground stations on Earth. The work is being carried out with SSC Space and its global ground station network.
“The demonstration is scheduled to complete more than 50 direct links to Earth via SSC Space’s partner ground station in Weilheim, Germany,” explained NASA, noting that these tests include both forward and return communications links.
The goal is to evaluate different ways of routing spacecraft data. In some situations, information could travel through relay satellites. In others, it could be sent directly to a ground station. This flexibility could help future missions make better use of available communications services. It also gives engineers a chance to test how different communications pathways perform under real operating conditions.
NASA Tests New Network Software
Alongside the communications demonstrations, the agency researchers are working with Aalyria Technologies to test enterprise service operations using the company’s Spacetime software platform. The software is designed to help coordinate communications services across multiple missions and providers. As explained by SciTechDaily, the demonstration is intended to show how shared management tools can simplify operations and provide a clearer picture of available communications resources.
This effort builds on several years of work between Aalyria and the U.S. Defense Innovation Unit through the Hybrid Space Architecture program. The program aims to improve interoperability between government and commercial communications networks. NASA also noted that:
“Through this collaboration, NASA benefits from the investments to mature the Aalyria Spacetime framework, building on previous progress achieved under the agency’s NextSTEP-2 program.”
As the agency continues testing the system through 2027, the project remains focused on one objective: demonstrating how spacecraft can communicate across multiple networks using a more flexible approach than traditional space communications systems.
