Figure2.mat: data of ray-tracing examples used in Figure 2
	nonduct: nonduct rays
	duct: duct rays
	nonduct/duct.n3d.den1: density profile used (m^-3)
	nonduct/duct..n3d.x/y/z: Cartesian coordinates used in density profile (RE)
	nonduct/duct.rtd: the rays used in the figure
		x/y/z: Cartesian coordinates of the ray (RE)
		lat: magnetic latitude of the ray (deg)
		lvalue: dipole Lshell of the ray
		psid: wave normal angle (deg)
		thetap: angle between Poynting vector and background B field (deg)
		Gendrin: Gendrin angle (deg)
		rkxbig/rkybig/rkzbig: three components of k vector in Cartesian coordinates

Figure4_rt.mat: data of ray-tracing of the 3 Alpha stations used in Figure 4
	output{1}： 36 rays from KHA station
	output{2}： 36 rays from NOV station
	output{3}： 36 rays from KRA station
	The variables in each ray is the same as RT_example.mat

Figure3-5.mat: data of statistical results of Alpha transmitter sigals waveform analysis for every identified pulse
	rbsp_num: statellite number, 1 for RBSPA, 2 for RBSPB
	lshell: Lshell of each pulse
	mlat: magnetic latitude of each pulse (deg)
	mlon: magnetic longitude of each pulse (deg)
	mlt: magnetic local time of each pulse (h)
	B_str: magnetic amplitude (nT)
	B_str_mean: averaged magnetic amplitude in each pulse, used to calculate the power (nT)
	E_str: electric amplitude (mV/m)
	Wave_3B3E: wave normal angle (deg)
	Azmu_3B3E： azimuthal angle of k vector (deg)
	Wave_P: polar angle of Poynting vector (deg)
	Azi_P: azimuthal angle of Poynting vector (deg)
	Plan_3B3E: planarity
	Kp_max: maximum Kp index in the previous 48 hours