Method for synchronizing a space telecommunications system comprising at least one satellite
AssigneeCentre National D'Etudes Spatiales
InventorJean-Pierre Diris
Life of this patent
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Abstract
The invention relates to a method for synchronizing a space telecommunications system comprising at least one satellite and several user terminals, each satellite comprising: off-line and real time means (20) delivering tracking measurements; a means for processing these measurements so as to smooth them through an orbit model in order to provide accurate orbit restitution and real time synchronization information; and a means (21) for transmitting the information to the user terminals (22).
Claims6
A method of synchronizing a telecommunications space system comprising at least one satellite and at least two user terminals, each satellite comprising means for transmitting synchronization information to user terminals, means for delivering off-line and real time tracking measurements, and means for processing the tracking measurements to smooth them through an orbit model, said method comprising the steps of:
- performing an accurate and real time orbit restitution measurement aboard each satellite;
- transmitting the satellite orbit restitution measurement and an on-board reference time to each of the user terminals;
- and
- synchronizing transmissions between each of the user terminals and a given satellite of the at least one satellite, with respect to the on-board reference time.
A synchronizing system for synchronizing a telecommunications space system comprising at least one satellite and at least two user terminals, each satellite comprising means for transmitting synchronization information to each of the user terminals, means for delivering off-line and real time tracking measurements, and means for processing the tracking measurements to smooth them through an orbit model, said synchronizing system comprising:
- means for performing an accurate and real time orbit restitution measurement aboard each satellite;
- means for transmitting the satellite orbit restitution measurement and an on-board reference time to each of the user terminals;
- and
- means for synchronizing transmissions between each of the user terminals and a given satellite of the at least one satellite, with respect to the on-board reference time.
A synchronizing system for synchronizing a telecommunications space system, said synchronizing system comprising:
- at least one satellite;
- and
- at least two user terminals,
- wherein each satellite is configured to transmit synchronization information to each of the user terminals, deliver off-line and real time tracking measurements, process the tracking measurements to smooth them through an orbit model, perform an accurate and real time orbit restitution measurement, and transmit the satellite orbit restitution measurement and an on-board reference time to each of the user terminals, and
- wherein each user terminal is configured to synchronize transmissions to a given satellite of the at least one satellite, with respect to the on-board reference time.
Dependencies are inferred from the claim text.