Optical signatures of the outer radiation belt boundary

Nithin Sivadas1, Toshi Nishimura2,3, Sebastijan Mrak3 and Joshua L Semeter4, (1)Boston University, Department of Electrical and Computer Engineering, Boston, MA, United States, (2)University of California Los Angeles, Los Angeles, CA, United States, (3)Boston University, Boston, MA, United States, (4)Boston University, Center for Space Physics and Department of Electrical and Computer Engineering, Boston, MA, United States