Fantastic Data


This simulation shows a 100 node network performing its surveillance mission. The surveillance mission requires the smooth interaction of all parts of the sensor protocol suite. Tracking is provided by the cooperative tracker. Information handling is provided by the data cache. Medium access is provided by the sas medium access protocol.

This short snippet of data (about 3 minutes) is played at about 2x real time. The nodes are shown as the small white rectangles. Links between the nodes are drawn as the nodes establish communications. The thickness and the brightness of the lines indicate the number of messages exchanged in the last second.

Total transceiver use is shown in the strip chart in the upper right corner of the display. Transmissions are shown in red, completed receptions are shown in blue, receive opportunities that did not result in a reception are shown in green, and collisions are shown in yellow.

The simulated intruder (brown diamond) enters the sensor field from the north and follows the brown path.

Detections and tracks are shown from the point of view of node 113 (approximately in the center of the field). Since the scope of any node is a local area about itself (shown as the dotted and dashed circles), detections and tracks from the entire network do not appear. Detections from the sensor nodes are shown as red blotches. The predicted target track is shown in purple. The flag to the right of each track point shows some summary information about the track-the track id, the time, and the id of the node making this particular update. The nodes cooperate to track a target as it passes through the network.

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