The first of four satellites forming an operational environmental system operated in partnership between NASA and the National Oceanic and Atmospheric Administration (NOAA) that images fires, volcanoes, oil spills, and other incidents and monitors atmospheric temperature, moisture, and pressure. JPSS-1 was launched on 18 November 2017, from California, into a Sun-synchronous polar orbit at an altitude of 824 km. Once in orbit, the mission name changed to NOAA-20.