ICAO	aircraft type code
lat i	latitude indicated by the ith sensor
long i	longitude indicated by the ith sensor
h	altitude
y	heading
$V$	flight velocity
$V_{xy}$	horizontal velocity
$V_z$	vertical velocity
ET	category of the aircraft emitting the signal
d	distance of the UAV from the sensory system
DT	UAV type
Did	UAV identifier
P UAV	probability of UAV detection
CL	confidence level
RCS	radar track RCS (radar cross-section)
az	estimated azimuth
el	estimated elevation
R	estimated distance between UAV and radar
x, y, z	estimated UAV coordinates relative to the radar (in Cartesian coordinate system)
$V_x, V_y, V_z$	velocity components of UAV in the x, y and z axes, respectively
$S_k\left(n\right)$	data sets determining detections collected in the same time
k	sensor index
n	subsequent moments in time $t_n=n\Delta t, n=1,2,\dots$
$\Delta t$	sampling period
$L_k\left(i\right)$	mapped detection set
i	detection index recorded in the log-register
T(n)	set of fused detections from ADS-B and AREOSCOPE
$P_i^k$	ith detection of kth antena
$c_i^k$	detection certainty factor
$A_s$	detection similarity matrix
R(n)	set of fused radar detections
$F\left(n\right)$	fusion of T(n) and R(n) sets