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“We were tasked with looking at all the available commercial standards out there, the notion being that to start from scratch would be hard and wouldn’t be well accepted,” says Raphael Some, chief technologist of the Autonomous Systems Division at JPL, who led that effort at the Center and later across multiple Government agencies and commercial industries. So around 2010, JPL’s internal research and development program funded a three-year project to explore alternatives.

By the 2000s, though, future space exploration demanded interconnect technology with bandwidths up to 10 gigabits per second or even higher for onboard applications. SpaceWire, a network standard developed in the early 1990s, offers higher speeds-up to 250 megabits per second-but lacks the fault tolerance and predictability the 1553 standard offers. Spacecraft data buses were traditionally designed according to a protocol the military established for avionics in the mid-1970s, known as the 1553 protocol, which results in networks that can handle about one megabit of data per second. Instead, they helped enable existing commercial software to simulate what is fast becoming a popular communication protocol in the space community and beyond, known as RapidIO.Ī computer communication protocol is a set of standards defining the physical and functional qualities of communication systems within or between computers, known as data networks. NASA’s need for higher-speed onboard electronic and communication networks drove the adoption of the Serial RapidIO communication protocol, but only after the Space Agency funded the development of a computer simulation of the Serial RapidIO standard by Mirabilis Design.īut they couldn’t do it on their own. Cables line the core stage of NASA’s Space Launch System, connecting flight-guidance avionics to the Orion capsule, ground control, and other systems.

The team wanted to predict the performance of a possible replacement for outdated, inefficient spacecraft data networks. In the early 2010s, a group at the Jet Propulsion Laboratory (JPL) successfully used simulation software to model the data transmissions, storage, and processing within and among all the sub-systems on a hypothetical spacecraft.

But modeling and simulation are powerful tools that can generate valuable information anywhere they can be applied. NASA famously uses simulation software to design spacecraft, predict satellite orbits, and train astronauts.

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