Stacking Penalities
1st mod: 100,000% effectiveness
2nd mod: 86,9119842% effectiveness
3rd mod: 57,1037996% effectiveness
4th mod: 28,2469117% effectiveness
5th mod: 10,5988834% effectiveness

Targeting Systems
Minmatar - Ladar
Caldari - Gravimetric
Gallente - Magnetometric
Amarr - Radar

Damage Type Inflicted -> To Inflict
Amarr: EM / Therm -> EM
Angel Cartel: XP / KN -> XP / KN
Blood Raiders: EM / TH -> EM
Caldari: KN / TH -> KN
Galliente: KN / TH -> TH
Guristas: KN / TH -> KN
Minmatar: EX / KN -> EX
Mordu's Legion: KN / TH -> KN / EM
Rogue Drones: TH / KN -> EM
Sansha: EM / TH -> EM
Serpentis: KN / TH -> TH

UNKNOWN: Combat sites. Can be found with ANY PROBE TYPE.
GRAVIMETRIC: Hidden asteroid belts
MAGNETOMETRIC: Archaeology/Salvage profession sites
RADAR: Hacking profession sites
LADAR: Gas Cloud sites