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Polar stratospheric clouds. (Photo: Paul Newman, GSFC/NASA)

New HAPS Alliance to promote high-altitude vehicles

February 26, 2020

Image: GPS World

UAV update: MIL-SPEC drones lost, but progress for pseudo-satellites

August 21, 2019

Image: GPS World

Unmanned taxis, solar-powered UAS in development

January 17, 2018

The solar-powered Helios in flight.(Photo: NASA)

AeroVironment launches joint venture for solar high-altitude long-endurance UAS

January 16, 2018