We are currently organizing a workshop in Sendai, Japan from June 1-5, 2020, to develop an implementation plan for a future Global Navigation Satellite System Tsunami Early Warning System (GNSS-TEWS).  The proposed workshop follows a very successful workshop funded by NASA held during July 25-27, 2017 in Sendai, Japan.  The GNSS Tsunami Early Warning Systems workshop (GTEWS 2017) was organized in collaboration with the Global Geodetic Observing System (GGOS) of the International Association of Geodesy (IAG),  the Association of Pacific Rim Universities (APRU) Multi-Hazards Hub at Tohoku University in Sendai, and the International Research Institute of Disaster Science (IRIDeS) at Tohoku University.  The previous workshop report was published by the APRU and can be found on the APRU website.  The purpose of this next workshop is to write a plan to implement the recommendations of the previous workshop, and in particular, to discuss details of implementation, including data sharing, software and hardware requirements, and roles of the various participants. 

1. GNSS
2. TEWS
3. 2020