The stereo (solar terrestrial relations observatory) impact (in-situ measurements of particles and CME transients) investigation includes the magnetic field, suprathermal electron, and solar energetic…

The Regents of the University of California, doing business as the University of California, Berkeley (UC Berkeley), has been awarded a $4,422,054.81 grant from the National Aeronautics and Space Administration (NASA) for the STEREO (Solar Terrestrial Relations Observatory) IMPACT (In-Situ Measurements of Particles and CME Transients) Investigation. This multi-year grant supports the operations, data processing, validation, and archiving roles associated with the STEREO mission instruments, as well as collaborative science activities that leverage the STEREO data. The award is part of NASA's STEREO mission extended phase and aligns with priorities outlined in the Heliophysics Decadal Survey. UC Berkeley, the prime grantee, is a public research university that has significant experience supporting NASA and Department of Defense research. The State of California Controllers Office serves as the parent organization for UC Berkeley. This grant does not have a set-aside designation.

The stereo (solar terrestrial relations observatory) impact (in-situ measurements of particles and CME transients) investigation includes the magnetic field, suprathermal electron, and solar energetic particle (SEP) instruments on the stereo spacecraft. The multi-institutional impact team has a long record of supporting the operations, data processing, validation, and archiving roles associated with this investigation and the stereo mission, of which research accomplishments based on the stereo data sets are a key part. Overall, this effort is consistent with the goal of exploiting the unique heliophysics resource that stereo represents, especially at a time of changing solar cycles and related heliospheric conditions, and when new insights are certain to result from combining observations with new and ongoing heliophysics and solar system missions. The impact investigation is now part of the stereo mission extended phase, currently supported under NASA grant NNX15AG09G on a three year renewal cycle. Here we propose for support of the remaining core team toward fulfilling its stereo project roles, while engaging in impact data application-oriented, collaborative, and opportunistic science. This combination provides visibility to stereo data products and science through regularly presented results at workshops and conferences including shine, AGU, and periodic LWS meetings, and publications in refereed journals. Together, these activities ensure stereo impact data contributions that are science-motivated, up-to-date and in-line with stereo mission and heliophysics decadal survey priorities.