In this paper, the possibility of GPS-based Forward Scatter Radar (GPS FSR), where satellites are exploited as sources of signals, to detect falling cosmic objects is examined. It is known that in FSR systems, the signal re-reflected by falling cosmic objects as masked by a much stronger direct signal. The goal of the article is to evaluate signal-to-noise ratio (SNR) of these signals at the detector input, after the correlator and the integrator. The results obtained show that the difference in SNR between direct and re-reflected signals is substantially dependent on the size of the falling object and the distance to it. The results obtained indicate what signal processing needs to be performed to separate the useful target signal from the direct signal.