Cube videotaped from the cockpit of commercial airline

[TheoryQED]

What is this thing exactly?
Source: https://www.youtube.com/watch?v=mprkfQTmH48&feature=emb_title


A radar reflector like the one from the Tyler Rogoway article? https://www.thedrive.com/the-war-zo...are-encountering-be-airborne-radar-reflectors

What's the purpose of it, and is the balloon really so translucent that we can't clearly see it?

 

[Mick West]

It looks more like a shiny balloon to me.


Hard to say how big it is, but you can get then 16 feet wide.


And of course lots smaller and cheaper