Jess (falconry) anklet worn by the bird, which is itself formed of another rectangular strip of leather, bound together at the ends by a grommet (usually of brass), prevented from slipping through the grommet by the knobbed end. Often, another slit is placed near the thin end of the jess cut about one inch long and running lengthwise, through which a special type of swivel is fitted, preventing the whole arrangement from twisting or tangling about itself or the bird when a leash is threaded through the other end. Their intent is more to prevent the risk of the bird deciding to
Space tether missions launch lock trouble of the tether reel mechanism." A follow-on Space Tethered Autonomous Robotic Satellite, STARS-II, Iaunched on 27 February 2014 as a secondary payload aboard an H-2A rocket. The 9-kg student satellite flew a 300-metre (980 ft) electrodynamic tether made from ultra-thin wires of stainless steel and aluminium. The mission completed after two months and deorbited on 26 April 2014. One objective of this program was to demonstrate possible technology for de-orbiting space debris. The experiment was only partially successful, and tether deployment could not be confirmed. The orbit decayed from 350 km to 280 km in 50 days,