What does S Band mean?
The S band is part of the electromagnetic spectrum's microwave band, which is defined by the standards set by the IEEE for radio waves. The frequency range for the S band is 2 to 4 GHz, which crosses the conventional boundary between UHF and SHF, which is at 3 GHz.
The S band is mainly used for radar systems such as surface ship radar, weather radar and various communication satellites, like those used by NASA for communicating with the International Space Station and the Space Shuttle.
Techopedia explains S Band
The S band is a radar-frequency band that uses short waves in the frequency range of 2 to 4 GHz. As mentioned, the main use for this band is for radar and communication. It is specially optimized for two-way communication and content delivery for small devices such as mobile terminals, vehicular terminals and handhelds, hence its use for satellite communication, especially in scenarios that need clarity and quick response, such as those required by NASA for the Space Shuttle and the International Space Station.
The S band is flexible and powerful, which makes it a viable technology for use in a wide range of applications for the general public, mostly for communication. The technology may be used for issuing distress signals in accident situations and for delivering real-time data and status for traffic and weather conditions. These services can then be integrated with navigation technologies that are now very prevalent in vehicles and mobile devices, allowing users to view updated real-time data and local information.