IERS综合河外射电源表的检验

本文对ＩＥＲＳ综合河外射电源表进行了检验，指出１９８８至１９９１各年度的ＩＥＲＳ综合河外射电源表中均存在坐标系统不一致问题，部分射电源的位置坐标中带有几个毫角秒的偏差，与公认精度不符。坐标系统不一致问题影响了ＩＥＲＳ综合表的指向维持，使此维持仅限于数学意义上的平均水平，失去了明确的物理意义。

Examination of the Combined Catalogues of IERS

Based on the relationship between the coordinates of sources in the combined catalogues and individual ones, extensive comparisons are performed in this paper. It is shown that source coordinates tabulated in each combined catalogues of IERS from 1988 to 1991 are not given in a compatible coordinate system. Deviations of several milliarcseconds are detectable in the coordinates of some sources. The problem of inhomogeneous coordinates also makes unexpected effect on the maintenance of the orientation of the IERS celestial frames, which is just on a level of mathematical meaning withont definite physical one.