What is an endo-atmospheric missile and can planes be equipped with them?

“The endo-atmospheric missile, capable of intercepting incoming targets at an altitude of 15 to 25 [kilometers] was launched against multiple simulated targets of 1500 [kilometers] class ballistic missile,” the Indian MoD said in an August 2 statement. “One target among simultaneously incoming multiple targets was selected on real time, the weapon system radars tracked the target and the missile locked on to it and intercepted the target with a high degree of accuracy.”

thediplomat.com/2018/08/indias-advanced-air-defense-interceptor-shoots-down-ballistic-missile-target-in-test/