"The Of Extreme Multi-Messenger Astrophysics (POEMMA) was designed as a Astrophysics probe-class mission to identify the sources of ) and observe s from extremely energetic transient sources. POEMMA consists of two identical spacecraft flying in a loose formation at 525 km altitude oriented to view a common atmospheric volume and to provide full-sky coverage for both types of messengers. Each spacecraft hosts a wide with a hybrid focal plane optimized to observe both the UV fluorescence signal from extensive air showers (EASs) and the optical signals from EASs."