👉 The term "subsolar" is used to describe a situation where a satellite or spacecraft, as part of its mission, communicates with Earth's atmosphere through an antenna that is located below the surface. This allows the spacecraft to receive and process information from the Earth's atmosphere at a reduced altitude, which can provide a more accurate view of the environment on the planet. The subsolar connection is crucial for ensuring that the spacecraft can communicate effectively with Earth and gather data about its surroundings.