A low-earth orbit (LEO) satellite includes a non-atomic clock configured to generate a clock signal, a navigation signal receiving and processing module, and a navigation signal generation and transmission module. The navigation signal receiving and processing module is configured to receive the clock signal from the non-atomic clock, receive first signaling including first timing data generated based on a high precision clock, and generate clock state data based on the clock signal and the first timing data. The navigation signal generation and transmission module is configured to receive the clock signal from the non-atomic clock, generate a navigation message that indicates the clock state data, generate a broadcast carrier signal by utilizing the clock signal, generate a navigation signal based on modulating the navigation message upon the broadcast carrier signal, and broadcast the navigation signal for receipt by at least one client device.