Amazon Leo

Amazon Leo: development of Amazon's constellation

Amazon Leo, developed under the name Project Kuiper until November 13, 2025, is a Low Earth Orbit satellite broadband system. It includes the space segment, ground gateways, backbone connectivity, and user terminals. The system is intended to provide Internet access and links for operators, enterprises, and institutions where terrestrial infrastructure is unavailable or insufficient.

Amazon announced the project in 2019, and the first two prototype satellites, KuiperSat-1 and KuiperSat-2, were launched in October 2023. Full-scale deployment of production satellites began in April 2025. On July 2, 2026, Amazon's mission log counted 396 satellites deployed after 14 missions. The satellites from the latest mission were then being raised from their injection orbit to their assigned operational altitude and commissioned. Amazon planned initial service rollout in 2026 after adding coverage and capacity to the network. The constellation remains in deployment, with service intended to expand in stages.

Architecture of the Amazon Leo constellation

Amazon Leo, previously developed as Project Kuiper, comprises a space segment, ground stations, and user terminals. Its satellites operate in low Earth orbit, reducing propagation delay compared with geostationary systems.

Original Gen1 orbital shells and authorized count

The original 2020 authorization from the U.S. Federal Communications Commission (FCC) comprised $3,236$ satellites. An order released on March 8, 2024, approved a modification reducing the first-generation authorization to $3,232$ satellites and changing their distribution. The modified configuration contains 782 satellites at 590 km and 33 degrees, 2 satellites at 590 km and 30 degrees, 1,292 satellites at 610 km and 42 degrees, and 1,156 satellites at 630 km and 51.9 degrees. An orbital shell is a group of satellites operating on orbits with similar parameters.

For Gen1, the FCC set milestones of $1,616$ satellites by July 30, 2026 and $3,232$ satellites by July 30, 2029. Its June 5, 2026 order waived the automatic reduction in authorized satellites after the first deadline but retained the final deadline.

In an FCC grant dated February 10, 2026, the Commission authorized a separate $3212$-satellite Gen2 system and a $1292$-satellite Polar system. They have separate deployment milestones and are not part of the Gen1 constellation described above. Amazon has also filed for a Direct-to-Device (D2D) system of up to $5105$ satellites, with deployment planned to begin in $2028$; the filing is not an authorization.

The original authorization specified the following shells:

• 784 satellites at an altitude of $590 \text{ km}$ with an inclination of $33$ degrees.
• 1,296 satellites at an altitude of $610 \text{ km}$ with an inclination of $42$ degrees.
• 1,156 satellites at an altitude of $630 \text{ km}$ with an inclination of $51.9$ degrees.

The range of inclinations is intended to provide coverage from $56$ degrees south latitude to $56$ degrees north latitude. The listed values describe the original 3,236-satellite configuration, not the distribution in the modified authorization. Regulatory milestones should also not be treated as the actual deployment schedule.

Amazon Leo technology: from satellites to ground stations

The network architecture combines phased-array radio antennas, optical intersatellite links, satellite propulsion, user terminals, and gateway stations connected to terrestrial networks. Amazon designs and builds its satellites in-house, and its OISL architecture was developed internally. These subsystems determine how the network provides coverage, moves traffic, and disposes of satellites at the end of their missions.

The Amazon Leo satellites

After testing the KuiperSat-1 and KuiperSat-2 prototypes in 2023, Amazon began production and regular launches of operational satellites. The LA-08 mission on July 2, 2026 deployed 29 satellites at an altitude of about 465 km. The Amazon Leo team then planned to raise them to 630 km and complete commissioning.

• Phased-array antennas: Each satellite is equipped with a phased-array antenna. It allows the satellite to form and steer several beams at the same time, serving multiple ground users as the spacecraft moves across the sky. Amazon Leo uses the Ka-band for radio communication. That band can provide substantial bandwidth, but rain attenuation must be considered in the link budget.
• Optical intersatellite links (OISLs): OISLs use lasers to transfer data directly between satellites. In 2023, Amazon demonstrated bidirectional links of up to $100 \text{ Gbps}$ between the two prototype satellites over a distance of about 1,000 km. Amazon says production satellites include multiple optical terminals, allowing the constellation to form a mesh in orbit. Traffic can follow paths through space instead of returning to the ground at every hop. This space backbone can reduce long-distance latency and dependence on a nearby gateway, although the actual path depends on network topology and gateway availability.
• Propulsion and deorbiting: Each satellite has its own propulsion system for station-keeping and end-of-life disposal. The FCC authorization includes deorbit operations, and Amazon describes a procedure in which a satellite lowers its orbit after the mission so that it re-enters the atmosphere. The maneuver is intended to prevent the spacecraft from remaining as orbital debris.

The ground segment: connection to AWS

The ground segment connects gateway antennas, terrestrial fiber, Internet connection points, and cloud or private-network endpoints. Amazon uses AWS infrastructure and services to operate and scale parts of this software-defined network.

• User terminals: Amazon has presented three terminal classes. Leo Nano is a 7 × 7 inch model with advertised downlink speeds up to 100 Mbps, Leo Pro is an 11 × 11 inch model with downlink speeds up to 400 Mbps, and the enterprise-oriented Leo Ultra is specified for up to 1 Gbps downlink and 400 Mbps uplink. The models cover portable, residential, enterprise, government, and telecommunications use cases. These are stated maximum rates, not a guaranteed rate for every link.
• Gateway ground stations and AWS integration: The Amazon Leo network uses a global set of gateway ground stations. Each gateway connects by dedicated fiber to the nearest Amazon Web Services (AWS) Region. From there, traffic can go to the public Internet, a customer's AWS resources, a private network, or another cloud provider. Amazon has also described private connectivity that sends traffic from a remote site directly to AWS without using the public Internet.

Launch and deployment strategy

Deploying more than 3,000 satellites requires repeated launches and coordinated satellite processing. Unlike SpaceX, which operates its own launch vehicles, Amazon has secured launch capacity from external providers. In 2022, Amazon announced up to 83 launches over a five-year period from three providers. The company described the agreements as the largest commercial procurement of launch services at that time:

• United Launch Alliance (ULA): The agreements covered Atlas V and Vulcan Centaur launches.
• Arianespace: The agreement covered Ariane 6 launches.
• Blue Origin: The agreement covered New Glenn launches. Blue Origin is a separate company founded by Jeff Bezos.

Later missions also used SpaceX Falcon 9, and Amazon's current materials describe a manifest of more than 80 launches involving Arianespace, Blue Origin, SpaceX, and ULA. Using several providers distributes scheduling and vehicle risks. Mass production takes place at a purpose-built facility in Kirkland, Washington, with stated capacity of up to five satellites per day.

Use cases, partnerships, and safety

Amazon Leo is a satellite connectivity service with planned consumer, enterprise, government, and telecommunications uses. Its connection with AWS is part of the network architecture and the commercial model Amazon presents for business customers.

• Consumers and communities without broadband: The primary stated market includes individual consumers, communities, and schools in areas without reliable broadband.
• Enterprise and AWS integration: Amazon describes secure, low-latency connectivity for business and government customers, including private paths from remote sites to AWS resources. A bundled service combining global satellite connectivity with AWS services may simplify access for customers already using that cloud, but its practical value depends on service availability, performance, and pricing.
• Telecommunications partnerships: Amazon has announced partnerships with telecommunications companies for cellular backhaul. Amazon Leo links can connect cell towers in remote locations to an operator's core network, allowing 4G/LTE and 5G coverage to reach areas where laying fiber is impractical. Amazon has identified Vodafone in Europe and Vodacom in Africa as early partners.
• Space safety and sustainability: Amazon has committed to reducing the effects of its constellation on the orbital environment and optical astronomy. The measures include active disposal at the end of a mission, coordination with NASA and the National Science Foundation, efforts such as darkening or changing satellite attitude, and sharing orbital information with operators and astronomers to support collision avoidance and observation planning.

Amazon Leo is a long-term connectivity program. Its outcome depends on constellation deployment, launch availability, terminal production, network operation, service cost, and compliance with regulatory conditions. Amazon combines cloud and logistics infrastructure with external launch providers and telecommunications partners. The program is intended to extend broadband access and provide additional links for enterprise, government, and mobile networks. Its scale will depend on deployment pace, service performance, and coordination with other space users.