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- The program package is tested by simulated data with/without the application of white noises.It is also preliminarily applied to the reduction of optical positions of four extragalactic radio sources. 采用模拟数据对该程序进行了可靠性检验，并将该程序应用于4颗河外射电源的光学定位。
- First Epoch VLBI Images of Three Extragalactic Radio Sources 三颗河外射电源第一历元的VLBI图像
- double extragalactic radio source 河外射电双源
- N-Cat Series Combined Extragalactic Radio Source Catalogues N－Cat系列综合河外射电源表
- extragalactic radio sources 河外射电源
- Recompilation of the Combined Extragalactic Radio Source Catalogues of IERS for Years from 1988 to 1992 1988至1992各年度IERS综合河外射电源表的重新归算
- extragalactic radio source 核外射电源
- extragalactic compact radio sources 河外致密射电源
- extragalactic extended radio sources 河外射电展源
- Quasar is short for quasi-stellar radio source. 类星体是“类似恒星射电源”的缩写。
- Still another technique, very long baseline interferometry, has radio telescopes on the ground listen to extragalactic radio waves to detect changes in the positions of the ground stations. 还有另一种方法，有非常长的基线干涉测量，在地面上有射电望远镜，去听银河系外的无限电波以侦察地面站的位置的改变。
- Extragalactic double radio sources and multiple radio sources 河外射电双源和
- The candidate catalog of radio sources for VLBI geometry network composed of Shanghai, Wulumuqi and Kunming is presented in this paper. 针对我国VLBI观测网对射电源的特殊要求，给出了现有备选射电源的列表和天球分布图，提出了扩充备选射电源数量的必要性。
- These formed shortly after the universe began and they came to the attention of earthling astronomers because quasars are powerful radio sources. 它们紧随宇宙伊始而形成，并因类星体是巨大的无线电波发射源而进入天文学家的视野。
- Radio sources were divided by Fanaroff &Riley (1974) into two classes, now known as Fanaroff and Riley Class I (FRI), and Class II (FRII). 来自电波喧噪活跃星系的电波发射是同步加速辐射，被臆测是非常平滑的、自然的宽频和高度偏振。
- Especially for flat-spectrum compact radio sources,the milli-arcsecond components with apparent superluminal velocity are detected with high probability. 尤其是对平谱致密射电源中毫角秒尺度的子源，能以相当高的概率观测到它的视超光速现象。
- In reception: Since Magnetic Loop antennas only function within a narrow range of frequency when tuned, they reject harmonic noise from other radio sources. 在招待会:从磁性环形天线只起作用在频率之内的一个狭窄的范围当定调,他们拒绝泛音噪声从其它无线电来源。
- Any of several celestial radio sources emitting short,intense bursts of radio waves,x-rays,or visible electromagnetic radiation at regular intervals,generally believed to be rotating neutron stars. 脉冲星若干能发出无线电波的天体之一，能以有规律的间隔发出短促且强烈的无线电波、X射线或肉眼可见的电磁放射，普遍认为它们是旋转磁中子星。
- Any of several celestial radio sources emitting short, intense bursts of radio waves, x - rays, or visible electromagnetic radiation at regular intervals, generally believed to be rotating neutron stars. 脉冲星若干能发出无线电波的天体之一，能以有规律的间隔发出短促且强烈的无线电波、X射线或肉眼可见的电磁放射，普遍认为它们是旋转磁中子星
- A transistorize radio takes no time to warm up. 晶体管收音机不需要预热时间。
