Antarctic Impulsive Transient Antenna

ANITA-IV launched in December 2016,[3] with a lighter overall build, tunable notch filters and an improved trigger system.

ANITA is a collaboration of multiple universities, led by UH Manoa[4] and funded through grants by NASA and the U.S. Department of Energy.

[5] ANITA flew four times between 2006 and 2016 and set the most competitive limits on the ultrahigh-energy diffuse neutrino flux above several tens of exa-electronvolt (EeV).

[6][7] ANITA-I and ANITA-III also each detected anomalous radio signatures that were observationally consistent with upcoming extensive air showers emerging from the surface.

The fourth flight of ANITA, ANITA-IV, also detected four events that were observationally consistent with upcoming tau-induced extensive air showers.