(a) The three experimental stations and related acronyms are described in the main text. Stellar photon receiving telescopes (Rx-SP) with primary mirror diameters of 0.2032 m (Meade 8-inch LX200 ACF, f = 2 m ) and 0.254 m (Meade 10-inch LX600 ACF, f = 2.032 m ) were used by Alice and Bob, respectively, although the telescope apertures were each partially covered to limit sky noise. Diameters and focal lengths of the quantum channel telescopes are Alice (Tx-EP: d = 50.8 , f = 100 mm ; Rx-EP: d = 80 , f = 400 mm ) and Bob (Tx-EP: d = 70 , f = 280 mm ; Rx-EP: d = 140 , f = 420 mm ). Latitude, longitude, and elevation for the three experimental sites are Alice ( A : 48.21645°, 16.354311°, 215.0 m), Bob ( B : 48.23160°, 16.3579553°, 200.0 m), and the Source ( S : 48...



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