> To achieve high-precision measurements from a balloon-borne environment, the SuperBIT gondola – at roughly 3500 lbs – stabilizes its telescope to sub-arcsecond precision (akin to a three degree-of-freedom Steadicam) while sophisticated optics further stabilize the SuperBIT camera to < 50 milliarcseconds.
https://blogs.nasa.gov/superpressureballoon/2023/04/20/ballo...