Bellatrix and TelePIX Bet on ‘Air-Breathing’ Propulsion for 2028 VLEO Mission
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The Race for the Low Ground
In the current satellite economy, the trend has been to push higher for stability. But for those obsessed with raw resolution and signal strength, the most valuable real estate in space is actually much closer to home—and significantly more hostile. South Korean payload developer TelePIX and Indian propulsion firm Bellatrix Aerospace have announced a strategic partnership to launch a geospatial demonstration mission in 2028, targeting Very Low Earth Orbit (VLEO).
Operating at altitudes between 150 and 250 kilometers, VLEO sits well below the standard Low Earth Orbit (LEO) shells where the majority of commercial constellations reside. The advantage is simple: proximity. A camera operating at 200km can achieve a level of detail that would require massive, expensive optics at 500km. However, the trade-off is atmospheric drag. At these altitudes, the “vacuum” of space isn’t actually empty; it is thick enough with residual gas to act like a brake, causing traditional satellites to decay and burn up in the atmosphere within weeks.
The Physics of ‘Air-Breathing’ Propulsion
To solve the drag problem, Bellatrix is leveraging a concept known as air-breathing electric propulsion. Rather than carrying a finite supply of heavy propellant—which typically limits the lifespan of a satellite—the Bellatrix bus is being designed to ingest the thin atmospheric particles present in VLEO. These particles are then ionized and accelerated through a Hall-effect thruster to create thrust, effectively using the environment as fuel.
This approach transforms the very obstacle that kills satellites—atmospheric drag—into the resource that keeps them aloft. Bellatrix has already established a foothold in the domestic Indian market with its electric thrusters, but the 2028 mission represents a leap in ambition. The company expects the demonstration bus to weigh approximately 200 kilograms, a size intended to prove that VLEO can support more than just tiny, disposable cubesats.
Optical Precision at the Edge of Space
While Bellatrix handles the survival of the craft, TelePIX is focused on the mission’s primary objective: imaging. The company is designing a specialized optical sensor tailored for the unique conditions of VLEO. Imaging at these altitudes introduces complex challenges, including higher orbital velocities and the need for extreme precision to avoid motion blur while moving at several kilometers per second.
The partnership isn’t just about a single launch. According to the companies, the 2028 mission is a precursor to larger, commercially viable constellations. Bellatrix CEO Rohan Ganapathy noted that while a small, low-drag satellite might suffice for a tech demo, moving the needle on geospatial intelligence requires larger platforms and significant propulsion breakthroughs. By proving the viability of the air-breathing bus, Bellatrix and TelePIX are positioning themselves to compete with industry players like Redwire and Albedo, who are also exploring aerodynamic spacecraft to gain an edge in Earth observation.
Shifting the Geospatial Paradigm
The move toward VLEO is driven largely by defense and precision observation needs. Higher resolution allows for better change detection, more accurate intelligence gathering, and reduced latency for communications. If the Bellatrix-TelePIX mission succeeds, it could lower the barrier for other firms to deploy high-resolution imaging without the prohibitive cost of oversized telescope mirrors.
The collaboration covers the full lifecycle of the mission, from the initial integration of the TelePIX sensor to launch and early orbit operations. For TelePIX, this marks a strategic pivot from standard LEO applications into the high-risk, high-reward territory of the ultra-low orbit. As the 2028 deadline approaches, the success of this mission will likely determine whether air-breathing propulsion becomes the standard for the next generation of orbital surveillance.
