Gamma-ray Source Identification by a Vehicle-mounted 4π Compton Imager. - Hideki Tomita; Agus Nurrachman; Hiroyuki Takahashi; Hidetake Ebi; Fumihiko Ishida; Eiji Takada; Jun Kawarabayashi; Ken'ichi Tsuchiya; Tetsuo Iguchi; Atsushi Mukai; Kotaro Kanamori; Kenji Shimazoe; et al. (SII, 2020)