Reno, Mary HallVenters, Tonia M.Krizmanic, John F.POEMMA and JEM-EUSO Collaborations2021-07-232021-07-232021-07-12Reno, Mary Hall et al.; EAS optical Cherenkov signatures of tau neutrinos for space and suborbital detectors; 37th International Cosmic Ray Conference, 12-23 July 2021; https://pos.sissa.it/395/1201/pdfhttp://hdl.handle.net/11603/2207537th International Cosmic Ray Conference, 12-23 July 2021 Berlin, Germany - OnlineMulti-messenger observations of transient astrophysical sources have the potential to characterize the highest energy accelerators and the most extreme environments in the Universe. Detection of neutrinos, in particular tau neutrinos generated by neutrino oscillations in transit from their sources to Earth, is possible for neutrino energies above 10 PeV using optical Cherenkov detectors imaging upward-moving extensive air showers (EAS). These EAS are produced from Earth-interacting tau neutrinos leading to tau leptons that subsequently decay in the atmosphere. We compare neutrino detection sensitivities for generic short- and long-burst transient neutrino sources and sensitivities to the diffuse neutrino flux for the second generation Extreme Universe Space Observatory on a Super-Pressure Balloon (EUSO-SPB2) balloon-borne mission and the proposed space-based Probe of Extreme Multi-Messenger Astrophysics (POEMMA) mission.10 pagesen-USThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.Public Domain Mark 1.0This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.Text