The combination of independently calculated common view and network based clock offsets can be a weighted average of the two values, involving {HEAD ~ respective weights} based on {TAIL ~ quality estimates} of the latter 
based on
The combination of independently calculated common view and network based clock offsets can be a weighted average of the two values , involving { HEAD ~ respective weights } based on { TAIL ~ quality estimates } of the latter
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH