| http://www.w3.org/ns/prov#value | - he singal modulating codes is not required, the improvement comprising measuring the phases of said signals by the steps of:(a) mixing said L2 signals with a local oscillator to provide an intermediate frequency signal; and (b) clocking a counter with said local oscillator; and (c) starting said counter with a signal that is synchronized with and whose frequency is a fraction of said local oscilla
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