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Angle of arrival estimation for all-sky interferometric meteor radar systems
ATRAD Pty Ltd., Thebarton, South Australia, Australia
Department of Physics, University of Adelaide, Adelaide, South Australia, Australia
Simulations have been used to investigate angle of arrival (AOA) estimation for all-sky interferometric meteor radars using the Jones et al. (1998) antenna configuration. The results suggest that the use of 2λ spacing phase differences significantly improves AOA accuracy, while use of wraparound and differencing the sines of the zenith angles lead to small improvements in AOA accuracy. The combined use of 2λ spacing, wraparound, and differencing the sines of the zenith angles reduces the percentage of estimates outside ±1° of the actual AOA by a factor of 2.5. The results suggest that the use of 2.5, 3, and 5.5λ spacing produces more accurate AOA estimates than the standard 2, 2.5, and 4.5λ spacing and that the optimal spacing for the addition of a fourth antenna to each antenna arm is around 20λ.
Received 25 January 2005; accepted 26 August 2005; published 6 December 2005.
Citation: (2005), Angle of arrival estimation for all-sky interferometric meteor radar systems, Radio Sci., 40, RS6010, doi:10.1029/2005RS003245.
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