Virtual target’s proportional navigation guidance
3-Dimensional virtual target
coincidence proportional counter
closed loop proportional valve
changeable gain proportional integral differential controller
cartridge proportional throttle valve
boron trifluoride proportional counter
boron trifluoride proportional
boron deposited proportional counter tube
bias in proportional control
BF8 proportional counter
BF3 proportional counter
base proportional driving circuit
Automatic ceramic powder storing and continuous proportional weighing
Augmented Proportional Navigation Guidance Law APN
Augmented Proportional Navigation
Amendatory Proportional Navigation with Variable Coefficient