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

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accuracy <strong>and</strong> target continuity over single-radar systems. 5 These authors discuss how their<br />

design addressed the two major technical challenges to fusing track data from low-cost radar<br />

networks; namely, registration (they used on-line calibration to a known target position or a<br />

strong moving target), <strong>and</strong> the slow scan rate of marine radars with asynchronous scanning. The<br />

authors conclude “Fusion can be successfully applied to these low-cost radar networks because of<br />

the advanced tracking algorithms used to produce the tracks themselves. With rich <strong>and</strong><br />

accurate dynamical information, the association problem is less prone to bad assignments, as full<br />

use is made of the velocity <strong>and</strong> turn-rate state values.”<br />

The Accipiter® Radar Fusion Engine (RFE), as illustrated in Figure 2-7, is designed to combine<br />

track information recorded in the RDS from multiple radars so that remote applications have<br />

access to all track data. Remote TVWs or third party software connected to the RDS can display<br />

track information from individual radars, or information combined from multiple radars. This<br />

capability improves situational awareness in several ways, depending on whether the radars<br />

overlap in coverage or not. If radars do not overlap, a single, wide-area display can be generated<br />

with tracks originating from radars distant from one another. On the other h<strong>and</strong>, if radars overlap,<br />

the system can track bird movements across larger areas, with track h<strong>and</strong>-off occurring as the<br />

birds move from one radar coverage zone to the next.<br />

An Accipter® Radar Remote Controller (RRC) is also illustrated in Figure 2-7. This device,<br />

combined with network interfaces to the DRP, supports complete remote control of the radars<br />

(including powering the radar on/off, switching from transmit to st<strong>and</strong>by, <strong>and</strong> changing the<br />

transmitted waveform). The Automated Radar Scheduler (ARS) can automatically schedule the<br />

operation of the radar <strong>and</strong> the DRP via the RRC.<br />

Figure 2-7. Components of a digital avian radar system.<br />

5<br />

The network <strong>and</strong> components employed in the Nohara, et al. (2008) study are identical to those employed at some<br />

<strong>IVAR</strong> study locations.<br />

21

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