Amazon Project Kuiper Prototypes Successfully Test Inter-Satellite Optical Links

Space News - Amazon has accomplished a successful trial of inter-satellite connectivity between its two Project Kuiper prototypes in low Earth orbit (LEO), marking a significant step as it gears up to establish a comprehensive mesh broadband network in space next year.

The tests, conducted between KuiperSat-1 and KuiperSat-2, utilized onboard optical communication payloads, maintaining a robust two-way link of 100 gigabits per second (Gbps) for approximately an hour each time, according to Rajeev Badyal, the Vice President of Project Kuiper.

Even though the satellites were nearly 1,000 kilometers apart during the experiments, the technology design allows for effective operation across distances of up to 2,600 kilometers. Amazon ambitious plans involve deploying over 3,200 satellites, and Badyal envisions them being positioned much closer than 1,000 kilometers as the constellation expands.

The testing phase, initiated in early November shortly after the satellites orbital launch a month prior, has proven successful. This accomplishment now empowers Amazon to incorporate laser links into operational satellites that are set to enter production "any day now."

Amazon in-house construction of each satellite includes multiple optical terminals, facilitating simultaneous communication with an unspecified number of satellites. Badyal highlighted the potential benefits of data transmission across Project Kuiper satellites, noting a 30% increase in speed compared to fiber optic cables on the ground, as light travels faster through space than through glass.

The accelerated data transfer capabilities hold particular significance for industries like financial services, where split-second stock trades are commonplace. Furthermore, the ability for data to seamlessly traverse from one satellite to another on its route to a ground station is crucial for sectors such as maritime, aviation, and others situated beyond the reach of terrestrial gateways.

Amazon move into optical inter-satellite links mirrors SpaceXs efforts with its Starlink LEO broadband constellation, which began integrating such links in early 2021 to avoid the need for ground stations over the poles to achieve global coverage.

Beyond speed and efficiency, a mesh network in space significantly enhances network resilience. The capability to reroute data and bypass potential satellite failures is a critical aspect, aligning with the strategies of other proposed constellations like Telesat Lightspeed.

Badyal expressed pride in the accomplishments of Project Kuiper, emphasizing that, despite Amazon relatively recent entry into the satellite design and building arena five years ago, they have achieved a milestone with inter-satellite link demonstrations, lasting an impressive 60 minutes and potentially longer.

Amazon confirmation on November 16 of successful end-to-end tests for KuiperSat-1 and KuiperSat-2 paved the way for the commencement of production on commercial satellites employing the same architecture. The company aims to initiate launches for these commercial satellites in the first half of 2024, capitalizing on contracts secured with United Launch Alliance, Arianespace, Blue Origin, and a recent agreement with SpaceX.