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