Tracer = 1.62 m (447 pixels)
Tracer's head = 0.206577181 m (57 pixels)
Tracer's head = 0.206577181 m (4 pixels)
Explosion's diameter = 7.69499998 m
Radius = 3.84749999 m
Doing near total fatalities
r_thermal = Y^0.41 * constant_th
r_blast = Y^0.33 * constant_bl
5000 tons = 476m R air blast, 100% fatalities
3.84749999/476= 0.00808298317
y^0.33=0.00808298317
Y=0.0000004563606
E=0.0000004563606 x 5000
E=0.002281803 tons of tnt
Tracer's pulse bomb: 0.0023 tons