phd0 and prob_of_exist

[leoneto98]

Im using your repository for the Radar Rs408 and I have notice that the prob_of_exist is attributed at pdh0, as show below:

ars_40X/src/ros/cluster_list_ros.cpp

Line 54 in 506ebaa

cluster_list.clusters[cluster_id_].prob_of_exist = cluster_2_quality_->get_cluster_pdh0();

I would like to know why this attribution is made? the pdh0 is not the probability for being an artefact caused by multipath or similar?
The association between pdh0 and prob_of_exist is direct?
Thanks for the great repository,
Léo