misleading title```
even for U.S and China that has difficulties of tracking our own F-22 and J-20```it needs a holistic detection system, radar and optical sensors, to detect stealth targets```
I dont know the U.S 5th gen air combat manuals, but for PLAAF, during exersises, all other pilots cannot fly into the "stealth corridor" unless the 5th gen fighters "revealed" their positions called in for "help"````
and also the stealth technology does not stand still, it evolves fast, As in order to counter stealth targets, China and U.S started on optical techs, both of them are leading in this field. They both have developed optical sensors that can detect small targets 150KM away! ````Russia is quite behind in this field, that is why you can see T-50 has loads of antennas all over its body```quite brilliant, but different to China and U.S, approach have to say.
for those counter measures listed above, U.S and China has invested loads on stealth coatings, that can furture reduce F-22, F-35 and J-31, J-20's stealthness to XX%, and also can be effective to optical sensors```
and the info I've got that PAF will be very likely getting 5th gen stealth fighters from China````once you have that, you'd know what is stealth````and you'd know the current air battle tactics and tachs applied can do little to 5th gen infomation centric warfare````