You dig yourself deeper...
An attenuation factor of 0 is the ideal condition, not 1. Hence it is attenuation. Zero is the lowest possible attenuation.
The attenuation factor is tied to the unit length.
If the attenuation factor were in meter units, then you would calculated the overall attenuation on meter unit distances.
The referenced paper is using km units for the attenuation factor shown. Easily proven by calculating the 0.1 factor stated in reverse.
You've made a fool of yourself in public... Again...