The integrated system is controlled by software that allows {HEAD ~ continuous deterministic signal observation} for {TAIL ~ arbitrarily long periods} of time 
for
The integrated system is controlled by software that allows { HEAD ~ continuous deterministic signal observation } for { TAIL ~ arbitrarily long periods } of time
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH