A data link received from a moving source, such as an aircraft or satellite, is often received at multiple locations.  Each received data stream is contaminated uniquely.  The industry unique GDP product line of Multi-Signal Combiner / Best Source Selection products is capable of accepting multiple signal sources and, based upon the measured signal quality of each, the best bits from each stream are seamlessly combined to form a high fidelity reconstruction of the original data content.  Knowledge of the data content, such as a frame synchronization pattern, is not required.  Therefore, even encrypted data streams are reliably processed without decryption.