Final answer:
The JDAM guidance system uses INS/GPS, which combines the benefits of Inertial Navigation System (INS) and Global Positioning System (GPS) for precise targeting.
Step-by-step explanation:
The JDAM (Joint Direct Attack Munition) uses a guidance system called INS/GPS. INS stands for Inertial Navigation System, which is responsible for determining the position, velocity, and orientation of the weapon. GPS stands for Global Positioning System, which provides accurate positioning information to the JDAM.
The INS/GPS guidance system combines the benefits of both systems. The INS provides continuous guidance, even when GPS signals are unavailable or jammed, while the GPS updates the weapon's position with high accuracy. This combination ensures precise targeting and increases the effectiveness of the JDAM.
For example, during flight, the INS measures the acceleration and rotation of the JDAM, allowing it to calculate its position. The GPS periodically updates the position information provided by the INS, making the guidance even more accurate.