SAN FRANCISCO - Southern California startup Viridian Space Corp. is developing an electric propulsion system for spacecraft in very low Earth orbit (VLEO) that utilizes air for plasma thrusters. This technology aims to extend satellite lifespans and enhance orbital maneuverability, according to CEO Rostislav Spektor.
Research on air-scooping electric propulsion dates back to the 1960s, but previous attempts have failed due to insufficient thrust to counteract atmospheric drag. Spektor noted that Viridian has improved system efficiency, successfully testing prototype hardware in a vacuum chamber.
VLEO is gaining traction among startups and established aerospace firms, with applications including high-resolution Earth observation and military satellite maneuverability. With the new propulsion system, satellites could potentially operate for a decade, leveraging commercial-off-the-shelf components.
However, challenges such as metal fatigue and atomic oxygen interactions with satellite materials remain. Viridian plans to demonstrate its technology in low-Earth orbit within three years and aims to develop systems capable of ingesting and storing propellant for satellite servicing missions.
Viridian has raised approximately $2.5 million in pre-seed funding and is seeking additional investment for its upcoming seed round. The U.S. Air Force and National Science Foundation have awarded contracts to the company under the Small Business Innovation Research program.