Time synchronization system, satellite system applied to the time synchronization system, ground system applied in the time synchronization system, time synchronization method and a computer-readable recording medium with a program

A time synchronization system comprising:

• a satellite system for transmitting a time frame by inserting the time frame between transmission frames at a specified timing, wherein the time frame comprises a frame containing information that indicates a time in the satellite;
• and
• a ground system for acquiring a time of generation of data in the satellite system based on the information indicating a time in the satellite in the time frame inserted between the transmission frames;
• where
• the satellite system appends the satellite time to data in the transmission frames when the data is generated in the satellite system;
• where
• each of said equipments has an internal time, and said satellite system distributes a time clock to each of said equipments and synchronizes the internal time of each of said equipment with the internal satellite time, where
• said satellite system inserts satellite time between transmission frames at two different of timing, and where
• said ground system obtains an average frequency of the satellite time from a time interval between the two satellite times inserted between received frames and from the time interval between the two ground times corresponding to the two satellite times, and corrects the time of generation of the data in said satellite system from this average frequency and an amount of drift from the official frequency of the satellite time.

A time synchronization system comprising:

• a satellite system for transmitting frames based on internally generated data;
• a ground system for acquiring the data generated in said satellite system from the frames transmitted from said satellite system;
• wherein said satellite system generates a time frame for realizing time correlation between said satellite system and said ground system and inserts the generated time frame between the transmission frames at an arbitrary timing, and said ground system acquires the time of generation of the data in said satellite system from the time frame inserted between received frames;
• wherein said satellite system appends the satellite time to the data generated internally, and wherein said satellite system generates the satellite time by counting clocks synchronized to a bit rate of the transmission frames, and sets an entire portion below time required for transmitting one frame of the satellite time to zero in the header of the transmission frame.

A time synchronization system comprising:

• a satellite system for transmitting frames based on internally generated data;
• a ground system for acquiring the data generated in said satellite system from the frames transmitted from said satellite system;
• wherein said satellite system generates a time frame for realizing time correlation between said satellite system and said ground system and inserts the generated time frame between the transmission frames at an arbitrary timing, and said ground system acquires the time of generation of the data in said satellite system from the time frame inserted between received frames;
• wherein said satellite system appends the satellite time to the data generated internally;
• and wherein
• said satellite system inserts satellite time between transmission frames at two different of timing, and wherein
• said ground system obtains an average frequency of the satellite time from a time interval between the two satellite times inserted between received frames and from the time interval between the two ground times corresponding to the two satellite times, and corrects the time of generation of the data in said satellite system from this average frequency and an amount of drift from the official frequency of the satellite time.

A satellite system applied in a time synchronization system having a satellite system for transmitting frames based on internally generated data, and a ground system for acquiring the data generated in said satellite system from the frames transmitted from said satellite system, said satellite system comprising:

• a time frame generator for generating a time frame to be used for establishing a time correlation between said satellite system and said ground system;
• and
• a transfer frame generator for generating transfer frames by inserting a time frame generated by said time frame generator between transmission frames at an arbitrary timing;
• wherein the satellite time is appended to the data internally generated, wherein the satellite time is generated by counting clocks synchronized to a bit rate of the transmission frames, and an entire portion of the satellite time below the time required for transfer of one frame is set to zero.