Mobile Satellite Services - MSS

"Mobile-satellite service (short: MSS ;also: mobile-satellite radiocommunication service) is – according to Article 1.25 of the International Telecommunication Union´s (ITU) Radio Regulations (RR)[1] – defined as «A radiocommunication service

* between mobile earth stations and one or more space stations, or between space stations used by this service; or
* between mobile earth stations by means of one or more space stations."

See Wikipedia: