It’s a high flyer!
The Proteus is a unique aircraft designed as a high-altitude, long-duration telecommunications relay platform, with potential for use on atmospheric sampling and Earth monitoring science missions as well. It was designed by Burt Rutan, president of Scaled Composites, and built during 1997-98 at the firm’s development facility in Mojave, CA. Normally flown by two pilots in a pressurized cabin, the Proteus also has potential to perform its missions semi-autonomously.
I was fortunate enough to see it in person at WFF way back when. Neat looking plane!