DARPA’s LASSO Bet: Three Companies, One Brutal Orbit, and the Hunt for Lunar Ice – Image for illustrative purposes only (Image credits: Unsplash)
Lunar water ice holds the promise of fueling future bases on the Moon, turning a barren world into a viable outpost for explorers and industries. Yet pinpointing deposits rich enough to extract demands precision that only a spacecraft hugging the lunar surface can deliver. The Defense Advanced Research Projects Agency recently awarded contracts to three companies under its LASSO program, tasking them with designing a small orbiter resilient enough to map ice concentrations above 5% from an orbit where most vehicles would quickly fail. This high-stakes competition highlights the fragile boundary between breakthrough and catastrophe in cislunar space.
LASSO’s Demanding Mission Profile
The Lunar Assay via Small Satellite Orbiter program targets very low lunar orbit, a regime plagued by the Moon’s irregular gravity field. Mass concentrations under ancient lava plains destabilize spacecraft within weeks, forcing constant adjustments to avoid drifting or crashing. DARPA confirmed the Phase 1 awards on April 30 to Benchmark Space Systems, Quantum Space, and Revolution Space, each tasked with proving a viable concept for sustained operations.
Phase 1 splits into 1A, a six-month design study, and 1B, an 18-month push to critical design review. Success here could lead to Phase 2 hardware builds, though DARPA has not guaranteed advancement for any team. The focus remains on autonomy and efficiency, as ground control lags behind the rapid perturbations spacecraft face at these altitudes.
The Three Teams Tackling the Orbital Nightmare
Benchmark Space Systems, a propulsion specialist, unveiled its Sapphire architecture shortly after the award. The design integrates chemical thrusters for quick corrections with electric propulsion for endurance, paired with terrain-relative navigation and obstacle detection. Chief Technology Officer Ryan McDevitt called the selection a milestone toward overcoming the technical hurdles of prolonged low-orbit flights.
Quantum Space leverages its Ranger platform, bolstered by last year’s acquisition of Phase Four’s hybrid thruster technology. President and CEO Kerry Wisnosky emphasized the award’s alignment with U.S. national security needs in the expanding cislunar domain. Revolution Space rounds out the trio, though it has shared few details on its approach. Each firm’s strategy reflects years of niche expertise now converging on DARPA’s vision.
- Benchmark: Hybrid propulsion plus advanced navigation for stability.
- Quantum Space: Maneuverable cislunar platform with acquired thruster tech.
- Revolution Space: Concept details pending public disclosure.
The Critical 5% Ice Threshold
Data from the Lunar Reconnaissance Orbiter reveals hydrogen – indicative of water – clustered in permanently shadowed polar craters, but concentrations vary widely. Deposits below 5% water ice prove uneconomical to mine, as extraction costs outweigh benefits for NASA’s Artemis program or private ventures. LASSO aims to resolve these at scales only low-orbit sensors can achieve, producing maps actionable for resource planning.
This sensitivity sets LASSO apart from coarser surveys. Instruments must distinguish subtle signals amid the Moon’s harsh lighting and terrain, a feat demanding proximity. Other nations pursue similar goals; China’s Chang’e-7 mission carries comparable ice-prospecting tools, potentially influencing future lunar resource disputes.
National Security Underpins the Pursuit
DARPA’s agenda extends beyond science to military maneuverability in cislunar space. Programs like DRACO nuclear propulsion and lunar architecture studies underscore the need for agile craft that loiter near surfaces without constant oversight. Wisnosky’s remarks echo Pentagon views of space as a contested logistics zone, not merely an observation post.
Low-orbit endurance enables persistent surveillance, rapid repositioning, and resilient operations far from Earth. Past smallsats, such as China’s 2018 Longjiang-2, orbited the Moon but shied from LASSO’s altitudes and maneuvers. Success here could standardize such capabilities, reshaping U.S. strategic options beyond geostationary belts.
Overcoming Propulsion and Autonomy Barriers
The core puzzle fuses propulsion, navigation, and real-time decisions. Chemical bursts counter sudden pulls, while electric systems conserve fuel for months-long missions – all on a compact satellite’s mass limits. Autonomy proves essential, as Earth communication delays outpace gravitational threats or ridge encounters.
Phase 1A studies wrap by year’s end, with critical reviews slated for 2027-2028. DARPA may consolidate to the top design, winnowing the field. Beyond a single flyer, LASSO could spawn a new breed of lunar prospectors, routine in their defiance of orbital decay.
Engineers face a proving ground where failure means lost hardware, but victory unlocks water for habitats, fuel for rockets, and a foothold for humanity’s lunar ambitions. The outcome will gauge not just technical grit, but the feasibility of enduring presence on a world that punishes the unprepared.