In the Sirius Satellite Radio system, how long is the orbital duration of the unique elliptical satellites?

In the Sirius Satellite Radio system, the unique elliptical satellites are designed to have an orbital duration of approximately 16 hours. This is significant because the elliptical orbit allows these satellites to provide consistent coverage over populated areas for broadcasting radio signals.

The 16-hour orbital period means that the satellites can move over a wider geographic area and thus improve service availability and signal strength in regions where traditional ground-based radio might struggle. The design of the orbit is specifically tailored to meet the service needs of Sirius Satellite Radio, optimizing the balance between coverage area and the economics of satellite operation.

By operating in this particular way, Sirius can effectively deliver uninterrupted audio content to its subscribers, which is a critical aspect of its service. The ability to maintain a relatively low altitude relative to Earth while still covering significant areas makes this orbital duration a key factor in their operational strategy.