The Relations between Rocket Assault Mode of Armed Helicopter and Projectle Dispersion

According to the rocket shooting data of the armed helicopter,the paper calculates probablity error of the impact and the dispersion angle,then the rocket's impact dispersion in the different assault mode from the dispersion angle,and concludes that the relation between assault mode and dispersion.At last,establish a common formula which can provide rocket dispersion in any mode for pilot to select in order to realise necessary dispersion.