A server acquires sports activity information including information on a start time of a sports activity and information on a host location of the sports activity, the server transmits precise satellite orbit information, which is effective at the start time, of a positioning satellite of which a satellite signal is determined to be receivable at the host location to the sports activity monitoring device, the sports activity monitoring device receives the precise satellite orbit information transmitted from the server, and the sports activity monitoring device monitors a user, who participates in the sports activity, using the received precise satellite orbit information.
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