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