Geostationery Lightning Mapper, GLM.

Built by Lockheed for NASA. This large aluminum housing was Electroless nickel plated followed by Laser Gold plated and will be aboard the soon to be launched
GOES – R weather satellite.

Epner Technology has been sole and single source for the low emissivity gold coating on
the Radiometer and the Sounder on every GOES spacecraft for more than thirty years. See, http://www.goes-r.gov/spacesegment/glm.html