The US Army could soon gain a new long-endurance sensing platform through Icarus’ high-altitude, solar-powered unmanned aerial vehicle (UAV).
Called APOLLO, the UAV is designed to operate in the stratosphere at altitudes above 60,000 feet (18,288 meters) while providing coverage of up to 7,500 square kilometers (2,896 square miles).
According to the company, it can continuously monitor targeted areas with data latency of just 5 to 10 milliseconds.

APOLLO is designed to support intelligence, surveillance, and reconnaissance (ISR), communications relay, and data backhaul missions while remaining cost-effective for mass production.
Its modular architecture also allows future upgrades, enabling multiple mission cycles without requiring a complete replacement.
Built for rapid deployment, the UAV can be operational within hours and remain on station for weeks, providing persistent overwatch without frequent repositioning.
Advancing Toward Operational Flight
Icarus has rapidly advanced APOLLO from an experimental laboratory concept to a full-scale prototype.
The platform has already undergone testing with the US Army at White Sands Missile Range, the Pacific Missile Range Facility, the National Training Center, and Naval Base Guam.
The company is now developing larger prototypes to evaluate critical subsystems, including communications, thermal management, and environmental protection

The effort aims to ensure reliable performance in stratospheric conditions, where temperatures can drop to minus 80 degrees Celsius (minus 112 degrees Fahrenheit).
“We always knew we were building toward a long-endurance stratospheric platform,” said Cameron Hargis, head of business at Icarus.
“The fastest path there is starting with smaller aircraft, rapidly testing and iterating on those systems, and then scaling into more capable vehicles.”