{HEAD ~ a) ambient light} present over an open gated range as {TAIL ~ an integrated ambient image} 
present as
{ HEAD ~ a ) ambient light } present over an open gated range as { TAIL ~ an integrated ambient image }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL