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

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Table B-2. Dates, times, <strong>and</strong> antenna angles of the TI-VPR recording sessions.<br />

Date Time (GMT) Angle Comments<br />

2 Oct 2008 22:21-23:22 30°<br />

3 Oct 2008 01:49-02:52 30°<br />

3 Oct 2008 15:07-16:11 20°<br />

3 Oct 2008 16:15-17:17 20°<br />

3 Oct 2008 19:23-20:26 20°<br />

4 Oct 2008 01:15-02:17 20°<br />

30°<br />

4 Oct 2008 19:48-20:52 20°<br />

5 Oct 2008 00:48-01:50 30°<br />

until 01:30<br />

after 01:30<br />

Data Analysis<br />

For analysis, the DVD containing multiplexed TI-VPR data is inserted into a DVD player <strong>and</strong><br />

the output signal sent to a demultiplexer (Colorado Video model 497-2C 2-channel Video<br />

Demultiplexer (Figure B-11). The output channel for the thermal imager is sent from the<br />

demultiplexer to a video peak store (VPS; Colorado Video model 443 Video Peak Store), <strong>and</strong><br />

from there to a video monitor. The VPS stores a new incoming pixel if it is brighter than the<br />

corresponding pixel already stored in frame memory <strong>and</strong> can show the track of a bright (warm)<br />

target as it moves over a dark (cool) background (Figure B-13). The output channel for the<br />

vertically-pointing radar display is sent from the demultiplexer directly to a second video<br />

monitor (Figure B-14). As a biological target passes through the field of view of the thermal<br />

imager, the altitude of that target is displayed as a bright arc or circle on the radar screen. The<br />

date <strong>and</strong> time stamp on the radar video display is from the GPS.<br />

323

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