Spider is the Cosmic Microwave Background polarimeter, which last flew from Antarctica in 2015. SuperBIT is like the Hubble Space Telescope, but smaller aperture and flies from a balloon. The experiment is run by Prof. Bill Jones and his team.

https://www.csbf.nasa.gov/map/balloon7/flight727N.htm

https://www.csbf.nasa.gov/antarctica/ice.htm