i don't know what the proper term is, so i'm just going to make bjork happy and call them aerodynamic scientifical tassles. are they just recorded visually by

i don't know what the proper term is, so i'm just going to make bjork happy and call them aerodynamic scientifical tassles. are they just recorded visually by a camera and then inspected manually for a test flight or are they part of some kind of active sensor system. cool stuff.