how about this: a new US technology, rail gun, with projectiles flying as fast as 7 times the speed of sound (9,072 km/h) can target incoming balistic missiles. like a rattle gun. can be installed on battleships. in fact, the US Naval Surface Warfare Center (Virginia) plans to induct a new generation of destroyers in 2016, more advanced than of zumwald destroyer class, equipped with rail guns.
Kratos Receives $20 Million Electromagnetic Railgun Program Contract Award Nasdaq:KTOS
"Railgun" mit 7facher Schallgeschwindigkeit kurz vor Einführung - P.T. Magazin
LOL,either the rail gun or laser weapon is in the testing stage.
Whether they can be competent for intercepting ordinary missles or not is still a problem.
By contrast,DF-21D and DF-26 are active weapons of PLA in the moment.
Assuming that the rail gun and laser weapon eventually succeed,they still can't intercept DF-21D
missle.
To rail gun,the initial velocity of cannonball is about 7~8 mach and this speed will keep reducing since
the cannonball leave the rail.But the speed of DF-21D exceeds 10 mach and it's maneuvering guidence.
God bless that the low-speed cannonball can hit the high-speed missile from a down direction to a up direction.
To laser weapon,its insufficient power requires a 3~5 second focusing on the same place of the missile warhead.
10 mach x 3second=10200 meters.God bless that the laser weapon can keep catching the same point on the missile war head.
And we even don't consider the air protection cover of the missile warhead in above situation.When the warhead reach 10 mach,the air near the warhead will be compressed and ionized.The density of this air
cover will be much bigger than the normal air.And the light of laser will scatter when it through this air cover.
This means that the laser weapon needs more time to destroy the warhead.But time is life in the war.10-mach warhead won't give you enough time to complete the process of catching,aiming and destroying.
By the way,the ionized air cover will make the electronic jamming difficultlly achieve its goal.