View this page "Outdoor RSSI Experiments and the Two-Ray Propagation M

[Gianni]

Hi all,

I posted a page with the results of outdoor experiments using TelosB
boards. The experiments are similar to what Ken did with MICA2 boards.

Using TelosB nodes, the maximum transmission range was 140m (460 ft)
using the on-board antenna and 350 m (1150 ft) using a couple of
directional antennas that we have developed at the University of
Florence. The RSSI measures are well explained by the Two-Ray
propagation model, which is briefly described in the posted page.

Click on http://groups.google.com/group/asu-embedded-networks/web/outdoor-rssi-experiments-and-the-two-ray-propagation-model
- or copy & paste it into your browser's address bar if that doesn't
work.