The International Celestial Reference Frame (ICRF) is a realization of the International Celestial Reference System using reference celestial sources observed at radio wavelengths.

ICRF = International Celestial Reference Frame The ICRF is managed by the International Earth Rotation Service (IERS) 11 Navigation and Ancillary Information Facility

The International Celestial Reference System (ICRS) defines coordinate axes that are closely aligned with those of the J2000 (aka EME2000) reference frame. The International Celestial Reference Frame (ICRF) and later versions of it (ICRF1, etc.) are realizations of the ICRS. For brevity, we'll simply refer to ``the ICRF'' below.

2021年11月11日 · 本文详细介绍了地心固连系itrf和地心惯性系icrf/gcrs之间的区别，重点讲解了极移、自转轴的自转（岁差）和章动现象，以及如何通过坐标转换矩阵将itrs转换为gcrs，包括不同历元的转换模型和计算方法。

The International Celestial Reference Frame (ICRF) is the realization of the International Celestial Reference System (ICRS). It comprises a catalog of precise equatorial coordinates of extragalactic radio sources observed by Very Long Baseline Interferometry ( VLBI ) .

2022年11月13日 · 国际天球参考架（International Celestial Reference Frame，ICRF）是天体测量学使用电波观测到的参考源实现的国际天球参考系（ICRS）。 在国际天球参考系的上下文中， 参考 架 是参考系的 物理实现 ，即参考架是参考源报告的坐标集，使用的是国际天球参考系所规定的 ...

2019年11月26日 · 地心固连系，即地固系，Cesium和STK软件里都用Fixed表示，在IERS中的正式表示为：ITRF（或ITRS）（international terrestrial reference frame）。 此 坐标系 和我们常见的WGS84系基本一致，仅微小差别。

The ICRS is materialized by precise equatorial coordinates of extragalactic radio sources observed in Very Long Baseline Interferometry (VLBI) programmes. This first realization of the ICRF, although officially adopted in 1998, was elaborated by the IAU Working Group on Reference Frame (WGRF) during 1995.

2020年10月26日 · A new realization of the International Celestial Reference Frame (ICRF) is presented based on the work achieved by a working group of the International Astronomical Union (IAU) mandated for this purpose. This new realization, referred to as ICRF3, is based on nearly 40 years of data acquired by very long baseline interferometry.

2018年4月16日 · 因此，ICRS 选择使用几乎 “恒久不动” 的河外天体作为参照物，这就是 ICRF（International Celestial Reference Frame）——国际天球参考框架。 ICRF 是一系列河外源的精确位置，这些源通常是遥远的类星体，它们足够遥远，以保证这一参考框架的 “惯性” 性以及稳 …