What is "toophan"

Toophan (, meaning "Typhoon" in Persian) is a series of Iranian anti-tank missiles. Toophan 1 is a reverse-engineered copy of the US military BGM-71 TOW missile. The Toophan-1's payload is a 3.6 kg high-explosive anti-tank warhead that can penetrate up to 550mm of steel armor. The range is 3,850m, the top speed 310 m/s. The manufacturer is the Aerospace Industries Organization of Iran, which has produced the missile since 2000. Several other variants are also built with more penetration power.