3 ms·
Seems to be this thing discussed here, https://en.wikipedia.org/wiki/Luneburg_lens#Radar_reflector https://en.wikipedia.org/wiki/Luneburg_lens#Radar_reflector
by perihelions 3y ago
Seems to be this thing discussed here,
https://en.wikipedia.org/wiki/Luneburg_lens#Radar_reflector https://en.wikipedia.org/wiki/Luneburg_lens#Radar_reflector
(caption: "Luneburg reflectors (the marked protrusion) on an F-35")
edit: Also here (with quotes from a US Air Force Avionics Technician):
https://theaviationgeekclub.com/these-devices-make-stealth-aircraft-visible-on-radar-screens/ https://theaviationgeekclub.com/these-devices-make-stealth-a... ("How Luneburg lens radar reflectors are used to make stealth aircraft visible on radar screens")