Space-based extensive air shower optical Cherenkov and fluorescence measurements using SiPM detectors in context of POEMMA

Developed as NASA Astrophysics Probe-class mission, the Probe Of Extreme Multi-Messenger (POEMMA) is designed to identify sources of ultra-high energy cosmic rays (UHECRs) and observe neutrinos. POEMMA consists two spacecraft flying in a loose formation at 525 km altitude, 28.5$^\circ$ inclination orbits. Each hosts Schmidt telescope with large collecting area wide Field-of-View (FoV). A novel focal plane employed that optimized both UV fluorescence signal from extensive air showers (EASs) optical Cherenkov signals EASs. In UHECR stereo mode, will measure spectrum, composition, full-sky distribution UHECRs above 20 EeV high statistics along remarkable sensitivity UHE The are quickly re-orient Target-of-Opportunity (ToO) neutrino mode transient astrophysical unique sensitivity. this be able detect tau events PeV by measuring upward-moving EASs for $\tau$-lepton decays induced interactions Earth. paper, POEMMA's science goals instrument design summarized focus on SiPM implementation POEMMA, detailed discussion properties EAS context wavelength offered SiPMs. comparison response between SiPMs MAPMTs currently planned use also discussed, assessing potential perform measurements.