Maybe someone is interested to tweak the config value.

From binMake/binarize/cfgVehicles.cpp

/// ReportTargetsChangeFactors serve to determine, how important change is neccessary in order to be reported.
/// Each item corresponds to 1 second delay. if (targetGrpWeight/targetGrpOLDWeight>factor) DoReport();
/// Example: after three seconds, the factor is ReportTargetsChangeFactors[2]==2.0
ReportTargetsChangeFactors[] = {3.0, 2.5, 2.0, 1.6, 1.3};
/// Inititial cost is used when target group change is to be compared to the empty group
/// Example: 1 man = cost 1 will be reported after the factor decrease under 1/ReportTargetsEmptyGroupCost=1/0.4=2.5
// and as ReportTargetsChangeFactor[1]==2.5, it will be reported after TWO seconds aggregation delay
// (more men can be detected meanwhile - and aggregated into one radio report)
ReportTargetsEmptyGroupCost = 0.4;