USNO Photographic Parallaxes. I.
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The U.S. Naval Observatory CCD trigonometric parallax program is described in detail, including the instrumentation employed, observing procedures followed, and reduction...
本文详细介绍了美国海军天文台（U.S. Naval Observatory）电荷耦合器件（Charge-Coupled Device，CCD）三角视差计划，涵盖所采用的观测仪器、遵循的观测流程以及数据归算……
