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Conclusion

The 2-D location uncertainty for 80 % of the events located by LASA (those occurring closest to station clusters in NM and FL) was better than 2 km, as determined through comparison with data from NLDN. The Florida result was not proven, but the argument is made based on the similar (or even shorter) baselines and the better propagation conditions in Florida. Within an array diameter of each sub-array, it appears to be reasonable to expect location accuracy on the order of or better than 10 km. Beyond this distance, the accuracies degrade steadily with distance when the members of the sub-array are the only participants in the location determination. Not addressed in this analysis were events detected by members of more than one sub-array and/or by the CR station.

The initial results of the LASA/LDAR reveal both the dissimilarities in the two data sets (with almost 100 LDAR events per one LASA event on average) and also indications of an underlying commonality in the data. Current research efforts are directed at extending the initial LASA/LDAR research presented in this paper.

The authors wish to acknowledge the significant accomplishments of our friend and coworker Robert (Bob) Massey, who passed away suddenly on March 5th of 1999. He was a brilliant and funny man who had a tremendous positive influence on those who knew him. He is dearly missed. K Cummins of Global Atmospherics provided the NLDN data used in this study. Furthermore, we thank the following individuals and institutions who have hosted LANL Sferic Array stations: T Hamlin, P Krehbiel, B Rison, M Stanley, and R Thomas of NM Tech; R Griego, J King, D Klassen, and H Pleasant of Eastern NM Univ.; J Morgan of Mesa Tech. College; D Morss and B Strabley of Creighton Univ.; M Brooks, J Madura, and F Merceret of NASA KSC; R Chang, D Rabson, and D Spurgin of the Univ. of South FL; Walter, Leslie, and Cheryl Peterson of Cyberstreet in Fort Myers; P Hackett, T Kelly, S Morgera, V Ungvichian, and H Vansant of FL Atlantic Univ.; J Goetten, V Rakov, K Rambo, and M Uman of the Univ. of FL; S Patterson and T Trost of Texas Tech Univ.; G McHarg, K Broome, and D Vititoe of the U.S. Air Force Academy; R Olson of Plains Network; J Fulton of Plains Telephone; and W Petersen, S Rutledge, and W Naylor of Colorado State Univ.. LANL personnel who also made significant contributions include A Jacobson, M Carter, D Roussel-Dupré, M Pongratz, and M Eberle. The enthusiastic support of all of these people made its success possible. This work was performed under the auspices of the United States Department of Energy. M. Heavner acknowledges many fruitful discussions with C. Talus.


next up previous
Next: Bibliography Up: Current Los Alamos Sferic Previous: Discussion
Matthew J. Heavner
2000-10-04