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Backscatter Concept & Setup Document to help you better understand backscatter by Bruce (N5SIX)

Backscatter Calculator (Excel Program) Adapted from and with appreciation to Ed Williams, author of Aviation Formulary version 1.42
        (miles)                 and AVFORM.XLS, available from http://williams.best.vwh.net/avform.htm#LL
                                    Important note:  Many of the subroutines call for fixed cell locations. Therefore, be advised and do not move any cells
                                    or insert rows or columns.  Enjoy - Bruce, de N5SIX
Backscatter Calculator (Excel Program) Same as above except distances in kilometers
       (kilometers)