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• 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.

Adding more precision to TULIP results

   Previously the TULIP algorithm located a host only giving latitude and longitude as integers without any floating points, as a result a lot of precision was lost. Therefore the TULIP algorithm was improved to give floating point precision. In order to test the new accuracy some tests were conducted.

• The first test was conducted on 1st July,2008. Here are the results of the test. Here we compared only those results where the same landmarks were used.
• The second test was conducted on 2nd July,2008. Here are the results of the test. Some quick observations from the tests are: