What the assets are, what they cost, how long they last and how they earn. Written for lenders, lessors and investors who already know aircraft and ships and want the same picture for satellites and ground stations.
Sources: Space Foundation, The Space Report 2025 Q2; Novaspace (01/2026); MarketsandMarkets; Jonathan McDowell. USD as published; accessed 29/06/2026.
Altitude sets almost everything about a satellite as an asset: coverage, latency, design life, unit cost and how many spacecraft a service needs.
| Characteristic | LEO — Low Earth Orbit | MEO — Medium Earth Orbit | GEO — Geostationary Orbit |
|---|---|---|---|
| Altitude | 200 – 2,000 km | 2,000 – 35,786 km | 35,786 km (fixed) |
| Orbital period | ~90 minutes | 6 – 12 hours | 24 hours (matches Earth) |
| Signal latency | ~4 – 20 ms (very low) | ~80 – 125 ms | ~600 ms (noticeable delay) |
| Coverage per satellite | Small footprint — needs large constellation | Medium footprint — 6–20 sats for global | ⅓ of the planet — 3 sats for near-global |
| Typical lifespan | 5 – 7 years | 10 – 15 years | 15 – 20 years |
| Unit cost | $0.25 – 1M per smallsat; $5–50M for large | $50 – 200M | $150 – 500M+ |
| Primary uses | Broadband (Starlink, OneWeb), Earth observation, IoT | Navigation (GPS, Galileo, GLONASS), broadband (O3b) | Broadcast TV, weather, fixed comms, military |
| Key operators | SpaceX, OneWeb, Planet Labs, Spire | SES (O3b mPOWER), GPS/Galileo | SES, Intelsat, Eutelsat, Viasat |
Why this matters for finance: altitude fixes asset life, replacement cycle and capital intensity. A GEO satellite finances like a wide-body aircraft: one large, long-lived asset on long contracts. A LEO constellation finances like a narrow-body fleet: shorter lives, higher volume, continuous replacement. The structures differ accordingly.
Each asset class scores differently on the five things a lessor looks at: asset life, revenue visibility, transferability, insurability and how mature the legal framework is.
Large, high-power satellites parked over one point on the equator, selling broadcast, fixed data and government capacity. The wide-body aircraft of the sector.
| Typical cost | $150M – $500M+ (build + launch) |
| Design life | 15 – 20 years |
| Revenue model | Transponder lease / capacity contracts |
| Contract terms | 3 – 15 years, often with renewal |
| Operators | SES, Intelsat, Eutelsat, Viasat, Arabsat |
| Manufacturers | Airbus, Thales, Boeing, Lockheed Martin, Maxar |
| Finance readiness | High — 15–20 yr lives, contracted capacity revenue, established insurance market, Berlin Space Protocol emerging |
Hundreds or thousands of small, mass-produced satellites delivering broadband. Starlink alone operates ~10,000 active units. Fleet economics, not single-asset finance.
| Typical cost per unit | $0.5M – $5M (mass production) |
| Constellation cost | $5B – $20B+ for full deployment |
| Design life | 5 – 7 years (continuous replacement) |
| Revenue model | Consumer/enterprise subscriptions |
| Operators | SpaceX (Starlink), OneWeb, Amazon (Kuiper) |
| Finance angle | Fleet financing, sale-leaseback potential |
| Finance readiness | Moderate — 5–7 yr lives, fleet-level financing needed, subscription revenue less predictable, mass production reduces per-unit risk |
Optical, radar (SAR) or multispectral imagers. Revenue comes from imagery and analytics rather than bandwidth, with defence, insurance and agriculture the main buyers.
| Typical cost | $10M – $300M depending on resolution |
| Design life | 5 – 10 years |
| Revenue model | Data subscriptions, government contracts |
| Operators | Planet Labs, Maxar, ICEYE, Airbus |
| Key customers | Defence, agriculture, insurance, mining |
| Finance angle | Recurring SaaS-like data revenue underpins debt |
| Finance readiness | Moderate–High — 5–10 yr lives, recurring data/analytics revenue, growing defence and commercial demand, diversified customer base |
Why ground matters: every byte a satellite sends or receives passes through a ground station. The segment was worth $41 billion in 2025 and is growing at 15%+ a year. The assets are fixed, on land, often on long ground leases, with 20-year-plus lives. They finance like infrastructure because they are infrastructure.
High-throughput terminals that connect a broadband constellation to the internet backbone. Antennas, radomes, RF chains and buildings on fixed sites; every constellation needs dozens of them.
| Typical cost | $5M – $30M per site |
| Useful life | 20 – 30 years |
| Revenue model | Capacity fees, hosting agreements, GsaaS |
| Operators | KSAT, RBC Signals, AWS Ground Station, Leaf Space |
| Demand driver | Every LEO constellation needs 40–100+ gateways |
| Finance angle | Long-life, fixed-location — very similar to telecom towers |
| Finance readiness | Very High — terrestrial assets, 20–30 yr lives, contracted revenues, standard insurance, no novel legal framework required |
Commercial facilities that aggregate satellite traffic and hand it to terrestrial fibre: content distribution, backhaul, enterprise services. Usually multi-tenant.
| Typical cost | $10M – $50M per facility |
| Useful life | 20 – 30+ years (upgradeable) |
| Revenue model | Multi-tenant hosting, co-location fees |
| Operators | SES Techcom, Telespazio, Globecomm |
| Finance angle | Analogous to data centres — proven financing models |
| Finance readiness | Very High — multi-tenant revenue, long useful lives, upgradeable, proven data centre financing models apply directly |
Telemetry, Tracking & Command stations monitor satellite health and position and send the commands that control it. Without TT&C a satellite cannot be operated, which is why control of the TT&C link sits at the centre of any creditor security package.
| Typical cost | $2M – $15M per site |
| Useful life | 20+ years |
| Revenue model | Managed service contracts, per-pass fees |
| Key point | Control of TT&C = constructive possession of satellite |
| Finance angle | Essential for creditor security — Berlin Space Protocol enables registration of rights |
| Finance readiness | Very High — mission-critical infrastructure, 20+ yr lives, managed service contracts, key element of creditor security package |
For context, not for financing. These are the asset classes next to the ones Caelum works in. Caelum finances satellites and, opportunistically, ground stations. It takes no launch exposure on any structure.
Reusable boosters are turning into multi-flight capital assets; Falcon 9 first stages have flown 20+ times each. Whether they ever finance like aircraft is an open question. Nobody has yet written a lease on one, and Caelum does not finance launch vehicles or take launch risk on any structure.
| Cost to build | $30M – $300M+ per vehicle |
| Reuse potential | 20+ flights per booster (Falcon 9 proven) |
| Revenue model | Per-launch fees ($60M – $150M/flight) |
| Key operators | SpaceX, Rocket Lab, Arianespace, ULA |
| Finance angle | Not a Caelum asset class; launch risk stays with the operator and its insurers |
| Finance readiness | Early Stage — no secondary market, no valuation precedent, no lease precedent |
Spacecraft that dock with satellites already in orbit to refuel, reposition or extend their lives. Northrop Grumman's MEV has already added 5+ years to two GEO satellites, which changes the residual-value arithmetic for the whole GEO fleet.
| Typical cost | $50M – $200M per servicing vehicle |
| Value proposition | Extends a $300M satellite's life by 5+ years |
| Operators | Northrop Grumman (MEV), Astroscale, Orbit Fab |
| Finance angle | Impacts satellite residual values and depreciation assumptions |
| Finance readiness | Early Stage — limited insurance and valuation precedent, but proven commercial deployments (Northrop MEV) are building the case |
With the ISS due for retirement around 2030, commercial replacements are in development for research, manufacturing, tourism and national-laboratory use.
| Estimated cost | $1B – $3B+ per station |
| Expected lifespan | 15 – 20+ years |
| Developers | Vast (Haven-1), Axiom Space, Blue Origin (Orbital Reef) |
| Revenue model | Government anchor tenancy + commercial services |
| Finance angle | Largest single-asset space financing opportunities |
| Finance readiness | Early Stage — $1B+ single assets with concentrated risk, but government anchor tenancy (NASA) de-risks; financing frameworks emerging |
A 50 kg LEO smallsat and a 6-tonne GEO spacecraft are built from the same subsystems. Three of them, payload, solar arrays and propellant, decide what the asset is worth at any point in its life.
Generate electricity from sunlight and store it in batteries for eclipse. Power capacity sets what the satellite can do: more power, more transponders or sharper sensors. Cell degradation over time is a key input to end-of-life planning.
The structural chassis carrying propulsion, thermal control, attitude control and avionics: the airframe of the satellite. Usually a standardised platform (Airbus Eurostar, Thales Spacebus, Maxar 1300) onto which different payloads are mounted, which is what makes redeployment possible.
The mission equipment, and the reason the satellite exists. Transponders and antennas on a communications satellite; cameras, SAR or multispectral sensors on an EO satellite. The payload earns the revenue and drives market value.
Carry data between the satellite and the ground: high-gain antennas for mission traffic, omnidirectional antennas for TT&C, and increasingly inter-satellite links for meshing constellation members together.
Chemical or electric thrusters for orbit raising, station-keeping and end-of-life disposal. Electric propulsion (ion or Hall-effect) is now standard for GEO: lower mass, slower manoeuvring. Remaining propellant is remaining useful life.
Handles swings from +150°C in sunlight to -170°C in shadow with radiators, heaters, heat pipes and multi-layer insulation. Thermal margin is what keeps electronics alive for a 15-year design life.
The finance takeaway: a satellite's value sits in its payload and its remaining propellant. The bus is a commodity. The three questions in any appraisal are: how much capacity does the payload have, how far have the solar arrays degraded, and how much fuel is left? Those set remaining useful life, and remaining useful life sets value.
Ground stations, teleports and gateways are the physical link between satellites and their customers. They are also the part of the sector that looks most like conventional infrastructure.
| Ground Asset Type | What It Does | Typical Capex | Useful Life | Revenue Model | Closest Traditional Analogy |
|---|---|---|---|---|---|
| Gateway Station | Connects satellite constellation to internet backbone | $5 – 30M | 20 – 30 yrs | Throughput / capacity fees | Cell tower / fibre PoP |
| TT&C Facility | Commands, monitors, and controls satellites | $2 – 15M | 20+ yrs | Managed service / per-pass | Air traffic control facility |
| Teleport | Aggregates traffic, connects to terrestrial networks | $10 – 50M | 25+ yrs | Co-location, hosting, transit | Data centre / carrier hotel |
| Optical Ground Terminal | Laser-based high-bandwidth satellite downlink | $3 – 20M | 15 – 20 yrs | Capacity / per-session fees | Fibre landing station |
| Ground Station-as-a-Service (GSaaS) | Cloud-integrated, multi-mission ground access | Varies (capex-light) | N/A (service model) | Usage-based / subscription | Cloud hosting provider |
Ground finances like infrastructure. Terrestrial assets on land, 20-year-plus lives, contracted revenue, known maintenance profiles and no novel legal framework: existing infrastructure-finance models apply as they stand. Caelum's focus is satellites; ground stations and TT&C facilities are financed where they come with an operator's fleet or stand up on their own merits.
Most space revenue is contracted and recurring. That is the revenue profile asset finance is built on.
Operators sell capacity, measured in MHz or Gbps, under multi-year contracts to telecoms, broadcasters, governments and enterprises. The dominant model for GEO and MEO. Contracts often carry escalation clauses and renewal options.
End-to-end connectivity for maritime, aviation, energy and government customers. The operator supplies space segment, ground, terminals and service management under SLA-based contracts. Higher margin than raw capacity.
LEO constellations sell internet direct to consumers. Starlink passed 9M subscribers and an estimated $10B+ of revenue in 2025. Churn is the risk; scale is the offset.
Earth observation operators sell imagery and derived analytics to agriculture, insurance, defence, mining and environmental customers, increasingly as SaaS. Recurring and diversified.
Ground station operators charge per-pass fees, hosting agreements or Ground-Station-as-a-Service (GSaaS) capacity. Multi-tenant teleports earn co-location revenue from several operators on one site. Utility-like cash flows.
Sovereign customers buy dedicated capacity, hosted payloads or bespoke ground services. Government-backed counterparties, often paid on an availability basis: the easiest revenue in the sector to underwrite.
Aviation showed that third-party ownership of high-value, long-lived assets makes a market more efficient. Over 50% of the world's commercial aircraft are leased. Space assets share the same characteristics, and less than 5% are financed this way.
| Feature | Aviation Leasing | Space Asset Leasing |
|---|---|---|
| Market maturity | 50+ years, $300B+ market | Nascent — first major deals completed 2023–2025 |
| Asset registration | Cape Town Convention (CTC) | Berlin Space Protocol (not yet in force) |
| Repossession mechanism | Physical — fly aircraft to neutral jurisdiction | Constructive — transfer TT&C codes (ground-based) |
| Valuation infrastructure | ISTAT appraisers, blue book values | Emerging — no standardised residual value guides yet |
| Tax-efficient structures | Ireland S.110, JOL/JOLCO, ECA financing | Ireland S.110 applicable; JOLCO potential |
| Lessee credit quality | Airlines — cyclical, some weak credits | Sat operators — often investment grade or govt-backed |
| Lease penetration | ~50% of global fleet | <5% |
Operators want the capacity, not the hardware, on their balance sheets. Institutional capital wants long-dated, contracted cash flows from physical assets. Leasing connects the two, as it has in aviation since the 1980s.
Caelum applies twenty years of aviation and maritime leasing to satellites and ground stations. Sale-leasebacks and finance leases, each held in its own Irish Section 110 DAC.
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