Advanced Short Range Air-to-Air Missiles
From Tardis Wiki, the free Doctor Who reference
Advanced Short Range Air-to-Air Missiles were a type of heat-seeking Missile used by UNIT.
The missiles were equipped with ifrared seekers that would lock on to flying craft, and release a blaze of flame that trailed behind it. The resulting explosion was big enough to send shockwaves across a large lake.
The missiles were used to shoot the mothership of a Rintlekk escape pod over Wasdale Head, causing the bracken on the hillside to burst into flame. (PROSE: At Childhood's End)