摘要
本文将1988-1992年期间国际地球自传服务(IERS)的地球定向参数快速服务和预报值与IERS终值作了比较,得到快速值与终值偏离的平均值分别为-0.8mas(X)、-0.9mas(Y)和+0.11ms(UT),均方差分别为±1.4mas(X、Y)和±0.32ms(UT)。分别按5、10、…、90天的预报长度得到预报值与终值偏离的均值和均方差。在各种预报长度下均值的变化范围不大,只有约1mas(X)、3mas(Y)和3ms(UT)量级,而当预报长度为30天时均方差分别为±11.2mas(X)、±8.6mas(Y)和±6.0ms(UT),当预报长度为90天时均方差达到±20.8mas(X)、±19.2mas(Y)和±14.7ms(UT)。
A comparison of EOP in Bulletin A published by the Sub-bureau for Rapid Service and Prediction with the final one in IERS Annual Report during 1988-1992 is made in this paper.It shows that the agreement between the rapid EOP and the final one is - 0.8±1.4 mas (X), - 0.9±1.4 mas (Y), and + 0.11±0.32 ms (UT). And the agreement between the predicted EOP and the final one is - 0.4±11.2 mas (X), +1.4±8.6 mas (Y), + 0.04±6.04 ms (UT) for 30 day's prediction and - 0.5± 20.8 mas(X),+ 3. 2±19. 2 mas (Y), - 2.89±14.49 ms (UT) for 90 day's prediction.
出处
《中国科学院上海天文台年刊》
1994年第15期34-38,共5页
Annals Shanghai Astronomical Observatory Chinese Academy of Sciences