What does it mean when a car's signal is interrupted?

[ONevaeh]

Car signal interruption refers to the weakening or complete loss of the vehicle's satellite positioning signal, rendering it unusable. Modern vehicles are equipped with satellite positioning systems to track their movements. When a car signal interruption occurs, it indicates that the satellite positioning signal is either lost or performing poorly. A satellite positioning system is a technology that uses satellites to accurately locate objects. It has evolved from its initial stages of low positioning accuracy, inability to provide real-time positioning, and difficulty in delivering timely navigation services to today's high-precision GPS global positioning system. This system now allows for the observation of at least four satellites from any point on Earth at any given time, enabling functions such as navigation, positioning, and time synchronization. An interrupt number is a code assigned by the system to each interrupt source for identification and processing. The interrupt number plays a crucial role in the interrupt handling process. In interrupt systems that use vector interrupt methods, the CPU relies on the interrupt number to locate the entry address of the interrupt service routine, facilitating program transfer. To find the entry address of the interrupt service routine in the interrupt vector table, the interrupt number (n) is multiplied by 4 to obtain a pointer. This pointer directs to the location in the interrupt vector table where the interrupt vector (i.e., the entry address of the interrupt service routine) is stored. The address (CS:IP) is then retrieved from this location and loaded into the code segment register CS and the instruction pointer register IP, effectively transferring control to the interrupt service routine.