Kidd, Chris2021-07-092021-07-092021Kidd, C., 2021: Requirements for a constellation of precipitation sensors, in The Joint IPWG/GEWEX Precipitation Assessment (ed. R. Roca), WCRP Report 2/2021, World Climate Research Programme (WCRP), Geneva, Switzerland.https://hdl.handle.net/1920/11975https://doi.org/10.13021/gewex.precip.3.4Satellites within the current precipitation constellation are old, with many missions beyond their designed operational lifetime. It is therefore crucial that there is a concerted program of new satellites and sensors to ensure continuity in satellite-based precipitation measurements. Planning the future constellation of precipitation sensors should include a long-term strategy for sensors that meet scientific and user requirements, support for current missions beyond their normal lifetime, new technology such as cubesats, and, fundamentally, a commitment to and support for current and planned precipitation-capable missions. Issues and considerations in designing this next generation of precipitation sensors are discussed in this subchapter, which also includes a concise inventory of missions planned for launch over the next decade.en-USAttribution 3.0 IGOFuture precipitation constellation, PMW radiometer, extended mission lifetimesBook chapter10.13021/gewex.precip.3.4