Spacewalk practice normally happens before launch, with instructors, equipment and a schedule built around a known task. An orbiting crew may encounter a repair that was not on that schedule. Once aboard the International Space Station, astronauts cannot simply return to a ground facility to rehearse. Evelyn Miralles worked on a virtual-reality answer to that practical problem: an onboard trainer that lets crew members review the outside of the station and explore a repair procedure while still in orbit.
Miralles, identified in a direct Univision interview as Venezuelan, authored a 2013 technical paper while affiliated with L3 STRATIS at NASA’s Johnson Space Center. The employment distinction matters: contractor engineers are part of the work, even when public shorthand calls everyone there a NASA employee. Her paper on an onboard ISS virtual-reality trainer explains that ground training and a later spacewalk could be separated by six to eight months. Crews might also face contingency repairs for which they had no earlier rehearsal. The trainer was designed to help refresh skills and inspect new work sites through an immersive model.
The underlying software, Dynamic On-board Ubiquitous Graphics, or DOUG, represented the station’s exterior in three dimensions. In the paper, Miralles described its role in ground-based spacewalk and robotics training and the effort to bring a more immersive version aboard. This is not virtual reality as a cinematic escape. The useful illusion is spatial: where a handrail lies, how a work site is oriented, what route a suited crew member might take. An error outside a spacecraft is not repaired by a better-looking animation. The model has to support decisions that can be checked against the actual hardware and procedure.
The invention belongs to a broader maintenance history. The station ages. Its configuration changes. Crew schedules and emergency needs do not always match the curriculum completed months earlier. A portable rehearsal environment addresses the gap between an astronaut’s earlier preparation and a task suddenly at hand. It cannot replace underwater practice, physical tools or a flight controller’s judgment; Miralles’s paper situates it among multiple training media. Its significance is that it moves some preparation closer to the moment of use.
Technology profiles often celebrate the headset because it photographs well. The more consequential feature here is the updated, navigable representation of a complex workplace. Miralles’s contribution helps show how software can preserve operational knowledge across distance and time. It also makes visible the engineers, including immigrant and contractor engineers, whose labor is usually folded into a mission’s collective logo.