Backscatter Studies and 3 -D Ray-Tracing, Final Report Sept. 1967 -Dec. 1968, Tech. Memo. ERLTMC-ITS 175 (References: Qtrly repts Jan-Mar 1967, IERTM-ITSA 59; Oct. -Dec. 1967, ERLTM-ITS 127; Jan-Mar 1968, ERLTMC-ITS 142; Apr-Jun 1968

Lowell H. Tveten, Leslie A. Berry, Robert D. Hunsucker, and W. J. Surtees

Abstract: Ionospheric irregularities represent departures from the ambient of up to 50% in electron density. Periods of high magnetic activity exhibit direction-of-arrival deviations which are more frequent and of greater magnitude than quiet periods. Mills T processing of backscattered signals with the present arrays does not appear very practical, and suitable array modifications would much improve the situation. Errors in plasma frequency mapping in remote areas by use of backscatter are discussed, and a plasma frequency mapping computer program to accommodate the backscatter data is described.

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