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

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Figure 6-8. Diagram of sampling “volumes” of eBirdRad <strong>and</strong> the TI-VPR (not to scale). The<br />

green <strong>and</strong> yellow denote the sampling volume of the eBirdRad <strong>and</strong> the red <strong>and</strong> yellow the<br />

sampling volume of the TI-VPR. The yellow indicates the sampling volume of the thermal<br />

imager that is within the coverage of eBirdRad. The vertical gray lines represent the edge of the<br />

eBirdRad sample polygon depicted in Figure 6-6 <strong>and</strong> Figure 6-7.<br />

For the thermal counts, we used a demultiplexer to extract <strong>and</strong> play back from the DVD the timesynchronized<br />

images recorded from the vertically-pointing radar <strong>and</strong> the thermal imager <strong>and</strong> to<br />

display them side-by-side (Figure 6-9). When a biological target entered the thermal imager<br />

display, the analyst would halt the playback <strong>and</strong> record on a data sheet the date <strong>and</strong> time,<br />

identification (bird, bat, insect), number of individuals, direction of movement, altitude above<br />

radar level (taken from the simultaneous vertically-pointing radar video display). We entered<br />

supplemental data on target behavior (e.g., circling, zigzag flight, hovering) into the comments<br />

column of the data sheet.<br />

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