450 stuff

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spot size projections

0.7mm aperture at 7.25" from origin => 0.2687" at 50cm above road surface (origin 51" below, 19.7" above)

1.0mm aperture at 7.25" from origin => 0.3839" at 50cm above road surface (same).

sample rate info

3 slots @ 3500 rpm 1000 pixel/raster => 175 raster/second or 5.7msecond/raster, 5.7usecond/sample

vehicle @ 2mph => 2.93 feet/second => 35.2inch/sec => 0.2011inch/raster

vehicle @ 10mph => 14.667 feet/second => 176 inch/sec => 1.0057 inch/raster

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