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However Dr. Les pointed out that we should be using three landmarks that have the minimum RTT values from the target. Thus we shuffled our values accordingly and re-ran the test . The error came down to 4.8199 km. Other figures are below:Distance to nearest landmark: 2.5132
Area of region: 27364
Estimated Lat Long: 37.377 -122.18
Actual Lat Long: with different set of landmarks. This helped to verify our results. Table below shows the results:
Landmark 1 | Landmark 2 | Landmark 3 | Error (km) | Distance to nearest landmark (km) | Area of Region (km) | Est. Lat/Long | Actual Lat/Long36.9899 -122.06 |
|---|---|---|---|---|---|---|---|
36.9899-122.06 (Santa Cruz) | 38.4829-121.64 (Davis) | 37.3558-121.954 (Santa Clara) | 25.254 | 2.5132 | 1498.5 | 37.474 -121.93 | 37.418 -122.2 |
37.4285-122.178 (Stanford) | 37.3762-122.183 (Palo Alto) | 37.3558-121.954 (Santa Clara) | 2.5156 | 2.5132 | 1048.8 | 37.429 -122.18 | 37.418 -122.2 |
Other results are also encouraging, so far I've analyzed around 20 targets, comparing multi-lateration and tri-lateration results. CBG with tri-lateration seems to be performing well.
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