WHOLE HELIOSPHERE AND PLANETARY INTERACTIONS

Whole Heliosphere and Planetary Interactions (WHPI) is an international initiative focused on the solar

minimum period that aims to understand the interconnected sun-heliospheric-planetary system. The

simpler magnetic configuration and infrequency of Coronal Mass Ejections (CMEs) makes solar

minimum an ideal time to follow how the solar magnetic and radiative output propagates through the

heliosphere and affects Earth/planetary magnetospheres and atmospheres. WHPI currently involves

more than 600 solar, heliospheric, geospace, and planetary researchers, with monthly colloquia and

show-and-tell tutorials, a special session at the Fall 2020 AGU, a workshop in 2021 with more than 200

registered participants, and multiple campaigns in support of Parker Solar Probe perihelia. A topical

AGU Journals Special Issue is currently soliciting papers. These and other activities are coordinated via

the WHPI web page (https://whpi.hao.ucar.edu/). The WHPI experience has been an excellent testing

ground for future endeavors to be organized under the umbrella of the NASA Heliophysics Systems

Observatory (HSO) Connect program.