Abstract: A method and a system for dynamic tariffing and billing where tariffs of telecommunication services are adapted based on the usage of telecommunication services between members of a group account.

Abstract: The application relates to the service “pre-paid calls on post-paid bill”. If, for example, there is no money left on a caller's pre-paid account when calling a specific number, the call is charged to the post-paid subscription of a subscriber who agreed to take over the costs for these specific calls. Or if a business buys pre-paid cards for his staff, calls of the employees on working days in the office hours are billed on the post-paid bills of the business rather than on the pre-paid cards.

Abstract: A method and a system for dynamic tariffing and billing where tariffs of telecommunication services are adapted based on the usage of telecommunication services between members of a group account.

Abstract: In an apparatus for orbit control of at least two co-located geostationary satellites a single interface is provided in the form of an orbit database for exchanging orbit and maneuver data between four independent decoupled function blocks of an orbit control system having a matched function scope, i.e. between a first function block for orbit determination and maneuver estimation/maneuver calibration, a second function block for maneuver planning, a third function block for monitoring the relative movement and a fourth function block for predicting specific events and ephemerides (FIG.