U.S. Naval Research Laboratory engineers launched PRAM, the Photovoltaic Radio-frequency Antenna Module, aboard an Air Force X-37B Orbital Test Vehicle on May 17 as part of a comprehensive investigation into prospective terrestrial use of solar energy captured in space.
![](https://scx1.b-cdn.net/csz/news/tmb/2020/nrlconductsf.jpg)
Source:
https://phys.org/news/2020-05-solar-power-satellite-hardware-orbit.html