Figure 2. A representative example of the reversed proton
energy spectrum at L = 3.15 based on the RBSPICE measurements at
02:04:47 UT on 29 March 2015. Four characteristic parameters of the
reversed energy spectrum, i.e., flux maximum
(f max), flux
minimum(f min), the energy of flux maximum
(Emax), and the energy of flux minimum
(Emin), are defined on the plot.