 Global Positioning System (GPS) satellites broadcast microwave signals to enable GPS receivers on or near the Earth's surface to determine locationand time, and to derive velocity .
<meaning-changed>  Global Positioning System (GPS) satellites broadcast microwave signals to enable GPS receivers on or near the Earth's surface to determine locationand time, and to derive velocity .
GPS signals are broadcast by Global Positioning System (GPS) satellites broadcast microwave signals to enable GPS receivers on or near the Earth's surface to determine locationand time, and to derive velocity .