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Using TULIP2 we located all PingER sites in North America. The results can be found here We conducted Tests both using alpha=100km/ms and 40km/ms Currently we are comparing the two results to see, where and how much improvement we are getting.
Alpha Comparison ( 100 km/ms vs 40 km/ms)
A series of three tests were performed to compare the value of 100 vs 40 for the value of alpha.
- The first test was performed on 3rd April,2008. The results of this test can be found here. A total of 121 North American PingER sites were used in the test.The average error distance for alpha = 100 (km/ms) was 307 km and alpha = 40 (km/ms) was 300 Km. Frequency analysis of sites revealed that some the most frequent sites used were:
Landmarks
Frequency
Chicago_UnitedStates_PL
34
NewYork_UnitedStates_PL
31
FNAL,Chicago
26
Philadelphia_UnitedStates_PL
26
Bloomington_UnitedStates_PL
22
Fairfax_UnitedStates_PL
11
Washington_UnitedStates_PL
11
- The second test was conducted on 24th April,2008. The results of this test can be found here. The average error distance for alpha 100 (km/ms) was 238 km and the median value was 243km. For alpha = 40 km/ms the average error distance was 273 km and the median error distance was 183 km.
- Third test was conducted on 1st may,2008. The results of this test can be found here.