Wherein the vignetted light sensors comprising a vignette depth resulting from the difference in {HEAD ~ height} between the tall structures and {TAIL ~ short light sensing structures}, and 
between
Wherein the vignetted light sensors comprising a vignette depth resulting from the difference in { HEAD ~ height } between the tall structures and { TAIL ~ short light sensing structures } , and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH