NASA’s Polylingual Experimental Terminal (PExT) has successfully demonstrated that spacecraft can seamlessly “roam” between government and commercial communications networks, similar to how cellphones switch carriers, reports Molly Kearns of NASA. Launched in July aboard a York Space Systems satellite, the wideband technology enables more reliable, flexible data exchange across multiple networks, reducing communication disruptions for space missions. The breakthrough supports NASA’s plans to expand commercial partnerships and modernize space communications, with future applications extending beyond low Earth orbit to the Moon and Mars. Kearns writes:

Just like your cellphone stays connected by roaming between networks, NASA’s Polylingual Experimental Terminal, or PExT, technology demonstration is proving space missions can do the same by switching seamlessly between government and commercial communications networks.

NASA missions rely on critical data to navigate, monitor spacecraft health, and transmit scientific information back to Earth, and this game-changing technology could provide multiple benefits to government and commercial missions by enabling more reliable communications with fewer data interruptions.

“This mission has reshaped what’s possible for NASA and the U.S. satellite communications industry,” said Kevin Coggins, deputy associate administrator for the agency’s SCaN (Space Communications and Navigation) Program at NASA Headquarters in Washington. “PExT demonstrated that interoperability between government and commercial networks is possible near-Earth, and we’re not stopping there. The success of our commercial space partnerships is clear, and we’ll continue to carry that momentum forward as we expand these capabilities to the Moon and Mars.”[…]

As commercial providers continue to advance their technology and add new capabilities to their networks, missions equipped with wideband terminals can integrate these enhancements even after launch and during active operations. The technology also supports NASA’s network integrity by allowing missions to seamlessly switch back and forth between providers if one network faces critical disruptions that would otherwise interfere with timely communications. […]

“Today, we take seamless cellphone roaming for granted, but in the early days of mobile phones, our devices only worked on one network,” said Greg Heckler, SCaN’s capability development lead at NASA Headquarters. “Our spaceflight missions faced similar limitations—until now. These revolutionary tests prove wideband terminals can connect spacecraft to multiple networks, a huge benefit for early adopter missions transitioning to commercial services in the 2030s.” […]

This technology demonstration will continue testing spaceflight communications capabilities through April 2027. By 2031, NASA plans to purchase satellite relay services for science missions in low Earth orbit from one or more U.S. companies.

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