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Sceye and SoftBank Achieve Stratospheric Connectivity Milestone in Japan

In a significant advancement for telecommunications, Sceye, a pioneering aerospace and material science company, in collaboration with SoftBank Corp., has successfully completed its first stratospheric connectivity demonstration, known as the Service Test 1 (ST1) mission. This demonstration is pivotal for the commercialization of High-Altitude Platform Systems (HAPS) in Japan, showcasing a new horizon for mobile communications and connectivity solutions.

The ST1 mission, which launched from New Mexico on August 9, 2026, traveled over 15,000 kilometers across the stratosphere to Japan, demonstrating cutting-edge technology aimed at enhancing mobile broadband delivery. Sceye utilized its proprietary 'cell tower in the sky', SceyeCELL, to facilitate mobile broadband connectivity for unmodified devices through SoftBank's extensive core network. This groundbreaking technology opens the door for numerous applications, including emergency communications, drone support, and delivering high-speed internet services in previously unreachable areas.

The Journey to HAPS

The journey from New Mexico to Japan was not merely a flight; it was a 13-day odyssey showcasing cutting-edge telecommunications technology at high altitude. Operating at around 16.5 kilometers above sea level, Sceye's mission made significant strides, confirming that stratospheric platforms can maintain connectivity while drastically reducing latency. Notably, the onboard servers processed data directly in real-time, achieving impressive round-trip response times of 68 milliseconds—over 40% less than traditional internet-based processing.

As Sceye's CEO, Mikkel Vestergaard Frandsen, stated, this flight represents a defining moment for HAPS technology. It proves the viability of utilizing the stratosphere as a reliable layer for infrastructure, crucial for the future advancements in fields like AI, edge computing, and eventually 6G.

Transformative Infrastructure

The strategic partnership between Sceye and SoftBank emphasizes a shared vision for HAPS as transformative infrastructure able to enhance existing terrestrial networks. As SoftBank invested in Sceye’s technology in 2025, this mission exemplifies how the duo seeks to expand connectivity options, particularly in disaster-prone areas, leading to greater resilience in communication services.

One of the primary advantages of HAPS technology is the ability to cover vast areas efficiently. Sceye's installations, once fully scaled, are designed to provide the same coverage as approximately 500 traditional ground-based towers, greatly reducing infrastructure costs and deployment times. During the ST1 mission, a series of communications tests were successfully executed, encompassing everything from routine texting and calling to complex video streaming setups and emergency alerts tailored for natural disasters.

The results speak volumes about the potential impact of HAPS systems. With the capability to operate in space-like conditions without the high costs associated with satellite technology, Sceye is redefining connectivity paradigms. The company’s platform simplifies the maintenance of high-capacity connections and observation, offering significant improvements for real-time environmental monitoring and resource management.

Future Prospects

The success of the ST1 mission marks just the beginning for Sceye and SoftBank. Both companies are committed to innovating together by integrating advanced technologies in communications and artificial intelligence. Junichi Miyakawa, President & CEO of SoftBank Corp., expressed their vision of creating a seamless connection across land, sky, and beyond, ultimately leading to a sophisticated three-dimensional communications network.

This mission is built on the foundation laid by Sceye’s Endurance Program earlier in 2026, where their technology proved capable of long-duration flights, essential for deploying HAPS in operational settings. It establishes a framework for future collaborations focused on enhancing infrastructure and connectivity solutions that cater to modern needs.

In conclusion, the fruitful completion of the ST1 mission not only heralds a new era for telecommunications in Japan but also sets the stage for a transformative leap in global connectivity. Sceye and SoftBank Corporation are not just enhancing communications; they are forging pathways to a connected future unlike any seen before.