An efficient ion bus, and a partner that closes the blackout.
OrbitRelay is a two-part CubeSat concept. The first part is a propulsion bus built around efficient ion thrust and a dual-mode philosophy. The second is the idea that makes it distinctive: a formal partnership with a constellation operator — a company like Starlink that already owns every leg of the communication tunnel — so that wherever the satellite goes dark over a remote region, the operator's terminals and inter-satellite mesh provide an immediate path home.
An ion-propulsion design tuned for persistence
The mission depends on the satellite being in the right place, at the right altitude, for a long time — so propulsion is doing real work, not just deorbit.
The bus draws on the electric-propulsion families covered in section 01: a gridded-ion or FEEP core for high specific impulse (2,000–6,000 s) at single-unit scale, sipping propellant while it slowly but relentlessly maintains orbit against atmospheric drag. The design intent is a satellite that holds a useful operational orbit for years rather than months, maximizing the number of passes over the remote regions where its relay concept pays off.
Looking forward, the project's propulsion roadmap follows the 2026 dual-mode direction: a single green propellant feeding both a chemical thruster, for the occasional fast maneuver — phasing into a better ground track, dodging debris — and an electrospray thruster for the patient, fuel-efficient station-keeping that defines normal operations. One tank, two behaviors, less overhead mass: a direct payload-efficiency gain that leaves more of the budget for the comms payload.
Partner with an operator that owns the whole tunnel
Recall the core problem from section 04: a LEO satellite sees a professional ground station for only minutes per orbit, and over remote regions — oceans, deserts, polar zones, deep wilderness — it sees none at all. The data sits on board, stale, for up to 100–150 minutes.
But those "empty" regions are no longer empty of connectivity. A constellation operator like Starlink already has terminals scattered across exactly these places — carried in by travelers, expedition teams, researchers and remote workers — and, critically, already owns every link those terminals depend on: the terminal-to-constellation radio, the inter-satellite laser mesh, and the gateways back to the internet. The OrbitRelay proposal is to partner with that operator so a CubeSat over a blackout zone can hand its data to a nearby terminal and let the operator carry it the rest of the way, end to end, on infrastructure it already runs.
Where the blackout lives — and how relays close it
Left: a satellite over a remote region with no ground station in range stores its data and waits. Right: a positioned consumer Starlink terminal in that same region gives the satellite an immediate path home.
How a pass would work, end to end
Satellite tracks toward a remote region
The ion bus has biased the ground track so the CubeSat passes over a target zone — somewhere with no professional ground station but a partner-operator terminal active below.
Handshake on the operator's link
As the region comes into view, the satellite connects to a participating terminal over the operator-enabled, licensed satellite-to-ground link — a camp, expedition base or remote site within the partner's network.
Operator carries it the rest of the way
The terminal passes the data into the operator's network, which carries it across its inter-satellite laser mesh to a gateway and onward to the mission over the internet — every leg on infrastructure the partner already runs.
Blackout window collapses
Instead of waiting up to ~150 minutes for a professional station pass, the data reaches the mission within the duration of the over-flight — turning a dead zone into a live downlink.
A volunteer relay network
The most ambitious version of the concept makes the ground segment intentional rather than purely opportunistic. As part of the partnership, the operator could run a volunteer program: after a CubeSat is deployed and its ground track is known, opted-in users travel to strategically chosen remote locations — a stretch of coastline, a high plateau, a polar approach — and camp there with their partner-network terminals during the satellite's overhead windows, specifically to provide a relay where the satellite would otherwise go dark.
It reframes the ground station from a fixed, expensive installation into something closer to a citizen-science expedition, sanctioned and coordinated by the operator: enthusiasts contributing coverage with hardware that already lives on the partner's network, positioned by the same orbital mechanics the mission already computes. A handful of well-placed volunteers along an orbit could meaningfully shrink the blackout for an entire constellation.
Placed by orbit, not by chance
The satellite's predicted ground track tells volunteers exactly where and when a relay would help most.
Hardware people already own
No custom ground station — a consumer terminal and a willingness to travel are the contribution.
Coverage grows with the crowd
Every additional volunteer node closes another gap. The network strengthens as participation grows.
Who handles which leg of the tunnel
The proposal works because one partner already operates the whole chain. Here is the division of responsibility it assumes — and what the partner would need to enable.
The mission supplies the space segment: the CubeSat, its ion-propulsion bus, the onboard radio, and the orbit and ground-track planning that puts the satellite over high-value regions. The partner operator supplies the ground and relay segment: the licensed satellite-to-terminal link, the terminals already deployed across remote areas, the inter-satellite laser mesh, the gateways, and the final hop to the internet. Because all of those legs already belong to the operator, there is no fragile, unofficial interface to maintain — the new work is a sanctioned link between the CubeSat and the operator's terminals, defined and licensed jointly.
What the partner would need to enable is the central ask: today, consumer terminals are designed to talk to the constellation, not to accept an uplink from a third-party CubeSat. A partnership turns that from a workaround into a product decision — exposing a relay mode on cooperating terminals, allocating spectrum for the satellite link, and setting the authentication and data-integrity rules for the service. Remaining engineering items — link budget and pointing during a fast over-flight, terminal firmware support, and the logistics of any volunteer program — sit naturally within an operator that already runs a global network at scale.
Explore the rest of the site
Sources: NTIA — Overview of LEO Satellite Systems · Starlink Direct-to-Cell coverage (2025) · Direct Satellite-to-Device RAN measurements (2025) · MIT News — dual-mode propulsion (2026) · NASA State of the Art — Propulsion