Alpha, also known as RSDN-20, is a Russian system for long range radio navigation. RSDN in Russian stands for (radiotehnicheskaya Sistema Dal'ney Navigatsii), which translates to English as "radio-technical long-distance navigation system".

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Not who you're looking for? Others named Alpha: borough in Warren County, New Jersey · 1930 transport aircraft family by Northrop · English post-trip hop group · town in Queensland, Australia

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