The need for accurate measurements of thermal velocity distribution functions in the solar wind

Lynn B Wilson III, NASA Goddard Space Flight Center, Greenbelt, MD, United States, Katherine Goodrich, University of California, Berkeley, Space Sciences Laboratory, Berkeley, United States, Drew L. Turner, Johns Hopkins University Applied Physics Laboratory, Laurel, United States, Ian J Cohen, Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States, Phyllis L Whittlesey, Space Sciences Laboratory, University of California Berkeley, Berkeley, United States and Steven Schwartz, Laboratory for Atmospheric and Space Physics, Boulder, CO, United States