The signed pitch-angle cosine ﹩{\rm{sgn}}({B}_{R})\,{\mu }_{B}﹩ versus time, with ﹩{\mu }_{B}=\cos ({\rm{PA}})﹩, in seven EPI-Lo energy ranges (labeled at right) from 02:00 to 12:00 UT on 2023 March 13. The flux is averaged over the 80 EPI-Lo apertures and binned into 18 equal-width μ_B bins on [−1, 1] at a 10 minute cadence. The ﹩{\rm{sgn}}({B}_{R})﹩ factor fixes the convention so that positive (negative) values along the vertical axis always correspond to particles moving antisunward (sunward) along B, regardless of the polarity of B_R. The color scale is the logarithmic differential flux in ﹩{({{\rm{cm}}}^{2}\,{\rm{sr}}\,{\rm{s}}\,{\rm{keV}})}^{-1}﹩.