Abstract

Simultaneous Doppler tracking of the same spacecraft from two widely separated stations on the ground can be profitably used in space experiments for the detection of low-frequency gravitational waves. The second, receiving only station, could be a VLBI radiotelescope. The instrumentation required to convert a VLBI system to Doppler measurement is relatively easy to set up and uses a digital tone extractor. The advantages of this new tracking configuration are discussed, espectially in relation to problem of noise from local sources.

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