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(IVAR) - Final Report - Strategic Environmental Research and ...

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Figure 6-7. The polygon around the position of the TI-VPR (red pushpin) used to delimit the<br />

sample area for the eBirdRad data collected with a 30° tilt angle of the antenna.<br />

Figure 6-8 is a diagrammatic representation of the volumes sampled by the eBirdRad <strong>and</strong> TI-<br />

VPR systems during the Edisto Isl<strong>and</strong> studies. The grey vertical lines represent the polygon that<br />

we used in the TVW to limit the eBirdRad counts to targets that were within a 250 m radius of<br />

the TI-VPR; only birds passing through the radar beam within this polygon (green & yellow)<br />

were counted for this analysis. The red <strong>and</strong> yellow segments represent the volume sampled by<br />

the TI-VPR, while the yellow section is the volume sampled by both the eBirdRad <strong>and</strong> TI-VPR<br />

units.<br />

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