PeeD
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well if you look at GBU-39
you see they can still use hit and run tactics unless Bavar become operational and we also protect systems like Bavar , 15th khordad and Talash with lots of short range air defense system right now our strategy is to engage those bombs a their target and that's the problem if you fail at those several seconds ,its the end for the target but if you engage the target several time in its path the chance of failure is reduced and it make enemy have no choice and come closer and get in the range of your defense
Well ideally a Tabas or 3rd Khordad would activate at a unknown location triggered by the IADS and suddenly engage the strike package that wants to engage the 15th Khordad. This is cheaper than a Bavar-373 engagement.
However the whole SDB issue is like this: First those ranges need to be cut by at least 30% because they are ideal scenarios: A clean aircraft releasing the SDB at max. altitude at full AB and max. speed.
Secondly: when the SDB arrives to its max. range it is a very slow and static target. The PK of AAA systems is high against such targets and preparation time plenty.
Realistic figures are 20km for JDAM-like PGMs and 40km for SDBs. If a F-15 just carries two SDB to reduce drag for max. release speed, it may achieve 70km or so.
Israelis did it like this: Just a few SDB per F-15 to allow high release speed coming from the Lebanese mountains. Now they have switched to a large supersonic stand-off missile, probably because the Pantsir proved so effective against SDBs (at least at those places where the few Syrian Pantsirs were available).
The SDB is in fact such a slow and easy target that a cheap single 100mm Sarir shot probably has something like 30-50% PK at 6km or so distance...
The Bavar-373 of course would have a secure high value kill if something is able to climb up to very high altitude at near mach 2 speed to release 2 or so unpowered low survivable PGMs. There the target is certainly no decoy and worth a salvo of at least two Sayyad-4.
In most combat scenarios SDB will be released at sub-sonic speed and there, the 45km range of the 15th Khordad is sufficient for the kill.
Expandable, subsonic and very stealthy drones and weapons are probably the bulk of targets that try to neutralize the missile bases.
PS: I bet that 110km PR figure for the SDB was achieved by a close to bingo fuel (no reserves for evasion, low altitude flight or the way back to base, just ready to be mid-air refueled after test-release), clean, F-15 on a hot summer day, @ max. afterburner and max. altitude and with storm like wind conditions to the back of the F-15 and SDB. Arriving to the target at speeds even hypercars can reach today on th road... US-MIC-PR