Advantages to Using Low Frequency Radio
Signal can be received anywhere in the world
The primary advantage of using ELF to transmit information is it can be received anywhere in the world. Because ELF is so good at penetrating materials, including the Earth's crust and seawater. This is also true for VLF signals. Any potential VLF transmission would be receivable almost anywhere on Earth. In fact, when the Soviet VLF transmitter became operational, a scientific station in Antarctica noticed the new VLF signals. These radio signals can also travel a long way -- astronomers have been studying ELF and VLF radio waves coming from the moons of Saturn.
The primary advantage of using ELF to transmit information is it can be received anywhere in the world. Because ELF is so good at penetrating materials, including the Earth's crust and seawater. This is also true for VLF signals. Any potential VLF transmission would be receivable almost anywhere on Earth. In fact, when the Soviet VLF transmitter became operational, a scientific station in Antarctica noticed the new VLF signals. These radio signals can also travel a long way -- astronomers have been studying ELF and VLF radio waves coming from the moons of Saturn.