Sceye 200-Foot HAPS Logs 88 Hours Station-Keeping in 12-Day Brazil Flight

Sceye completed a spring 2025 test that kept the 200-foot platform aloft for 12 days, including 88 hours of active station-keeping against stratospheric winds while routing power from solar arrays to electric fans. The flight path ran from New Mexico to the Brazilian coast, validating helium retention, lightweight composite fabric, and onboard energy storage sufficient for continuous operation through night cycles. Data logs show position corrections executed within a 2 km radius at 18 km altitude.

Prior HAPS programs supply the missing baseline. Airbus Zephyr S achieved 64 days aloft in 2022 yet carried no commercial payload; Google Loon logged 312 days of cumulative flight time before shutdown in 2021 after spectrum and cost failures. Sceye’s 88-hour parked segment therefore exceeds Loon’s per-mission dwell times while adding direct-to-device 5G transmission not present in either predecessor.

Operationally this reduces backhaul latency to under 1 ms versus LEO satellite hops and eliminates the 550 km orbital plane changes required for coverage density. The platform still requires FAA and Japanese MLIT waivers for persistent stratospheric loiter plus coordination on 3.5 GHz spectrum already allocated to terrestrial 5G.

Next milestone is the August Japan crossing followed by 30-day endurance trials; success threshold is continuous 5G link uptime above 95 percent during peak wind shear periods recorded at 18 km.