Before revision: Where is the acceleration perpendicular to instantaneous line of sight , is the proportionality constant generally having an integer value 3-5 (dimensionless), is the line of sight rate, and V is the closing velocity.
After revision: Where is the acceleration perpendicular to the missile's instantaneous velocity vector , is the proportionality constant generally having an integer value 3-5 (dimensionless), is the line of sight rate, and V is the closing velocity.