Radio-optical Reference Catalog, Version 1 (RORC-1)
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The fundamental celestial reference frame (CRF) is based on two catalogs of astrometric positions: the third realization of the International Celestial Reference Frame (ICRF3),...
基本天球参考架（Celestial Reference Frame, CRF）基于两类天体测量位置星表：国际天球参考框架第三版（International Celestial Reference Frame, ICRF3）……
