Precipitation Virtual Constellation (P-VC) Committee on Earth Observation Satellites Precipitation Virtual Constellation (P-VC) Steven Neeck (NASA) and Riko Oki (JAXA) CEOS SIT-33 Session 3 Agenda Item #3.6 Boulder, CO, USA 24 – 25 April 2018

Linkages to CEOS Work Plan, open SIT and Plenary actions CEOS 2018-2020 Work Plan Objectives/Deliverables VC-17 - Support to ECV precipitation parameter 2018-1 Reprocessing of all TRMM data to GPM standard (Version 8) 2018-2 GPM DPR swath expansion in routine operations 2018-3 Operational availability of JPSS-1/NOAA-20 MIRS precipitation products 2018-4 Completion of AMSR2 FO MDR and initiation of pre-project phase 2018-5 Launch of MetOp-C (for incorporation into GPM constellation) VC-18 - Programs for improvement of global precipitation products 2018-1 International Collaborative Experiment–PyeongChang Olympics- Paralympics (ICE-POP) 2018-2 GPM Vector and Waterborne Disease Workshop 2018-3 AMSR-E reprocessing to AMSR2 standard algorithms and formats 2018-4 Expansion of GSMaP_NOW NRT multisatellite product to Meteosat region Open SIT and Plenary Actions - None

Team Achievements and Planned Outputs Achievements (since 2013) Deployment and operationalization of GPM constellation Precipitation ECV support through response to GCOS IP Action A8 Support to GEOSS through numerous (8) actions/deliverables (2013-present) An active X-CAL WG for Passive Microwave (PMW) sensors directly contributing to the enhancement of precipitation measurement and uniformly calibrated multi-satellite products The PMW Imager Availability Study and promotion of MWI on EPS-SG Coordinating mechanism for inter-agency scientific dialog on GPM Follow On and Cloud and Precipitation Processes Mission (CaPPM) concepts Development of the P-VC Data Portal and its lessons learned Additional space/ground segment, products and services deliverables as identified in the P-VC Terms of Reference (ToR) Planned Outputs Continued evolution of VC-17 and VC-18 in support of GEO Contribution to US DS response and other mission planning frameworks through GPM FO and CaPPM concepts Support to 2016 GCOS IP Action A25 (and A16, A26)

Synergies Among Teams Current synergies WGDisasters – Landslide Pilot (Co-lead), Flood Pilot (support through Global Flood Monitoring System) WGClimate (ECV inventory, precipitation support to GCOS IP response) SST-VC – PMW Radiometer Continuity GEOGLAM - use of P-VC data through the JASMIN system contribution to the Asia-RICE initiative Potential synergies FDA, WGCV, WGCapD, SDG Obstacles/barriers Resources (human/budgetary)

Sustainable Commitment CEOS P-VC Agencies Active: NASA, JAXA, NOAA, EUMETSAT Less Active: CSA/EC, INPE, ISRO, CNES/CNRS Inactive: ESA, DLR, ROSHYDROMET, NSMC/CMA The active agencies represent a viable team Meetings are held every calendar year (workshops with 30-40 participants and planning meetings with 10-25 participants) on sidelines of PMMST, CGMS-IPWG meetings, and others, e.g. EUMETSAT Meteorological Satellite Workshop Travel funding has constrained some participation as has team availability

Proactive Consideration of Plenary and SIT TWS deliverables and discussion items None proposed Several discussion items proposed to SIT Chair for VC/WG Day

Back Up

Precipitation Virtual Constellation (P-VC) Background: The CEOS Precipitation Virtual Constellation was established in 2007 with the participation of seven CEOS members as one of the four prototype CEOS Constellations. Purpose: Its primary role is to establish an international framework to guide, facilitate, and coordinate the continued advancement of multi-satellite global precipitation measurement. Its original purposes included: Facilitating implementation of the Global Precipitation Measurement (GPM) mission and encouraging more nations to contribute to the GPM constellation Sustaining and enhancing an accurate and timely global precipitation data record including a Fundamental Climate Data Record fit for the purpose specified by GCOS for the monitoring of Precipitation as an Essential Climate Variable (ECV).

P-VC Terms of Reference (ToR) High-level outcomes and deliverables

Response to GCOS Action A25 (2016 GCOS IP) - Ensure continuity of global satellite precipitation products Deliverables Sustainment and enhancement of constellation of satellites carrying microwave radiometers (both imagers and sounders) and moderate inclination satellite carrying microwave imager and precipitation radar. Well characterized and stable Level 1B calibrated, geolocated brightness temperature (Tb) products from each PC radiometer. Inter-calibrated brightness temperature (Tc) products by applying the GPM core observatory reference standard. Precipitation retrievals using physically based a-priori database constructed from combined radiometer/radar measurement. Global monthly PDF of precipitation intensity based on the above.