{HEAD ~ The disclosure} relates to {TAIL ~ the field} of time synchronization between two geographically separated clocks, such as the stationary clocks of the phasor measurement units of a wide area monitoring system for a power transmission network 
{ HEAD ~ The disclosure } relates to { TAIL ~ the field } of time synchronization between two geographically separated clocks , such as the stationary clocks of the phasor measurement units of a wide area monitoring system for a power transmission network
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