深空探测学报Issue(3)：230-235,6.DOI:10.15982/j.issn.2095-7777.2014.03.012
高精度 UT1-UTC 差分预报方法研究
High Accuracy Differential Prediction of UT1-UTC
摘要
Abstract
This paper proposes a prediction method of UT1-UTC in Earth orientation parameters (EOP)by dual differential least-squares (LS)and autoregressive (AR)model.Firstly,leap seconds are removed in UT1-UTC observations,and Earth zonal harmonic tidal are corrected.Then,the corrected UT1-UTC are processed by dual differential method,the stationarity of polar motion parameters is improved.LS+AR method is utilized to analyze the dual differential UT1-UTC to obtain the preliminary prediction results.Finally,the preliminary prediction results are processed by inverse dual differential method,and tidal correction are extrapolated and leap seconds are recovered to obtain high accuracy UT1-UTC prediction results.The prediction results are compared with EOP prediction comparison campaign (EOP_PCC)results.It shows that the short-term UT1-UTC parameters prediction error is at the same level of EOP_PCC.The one day prediction accuracy of UT1-UTC is less than 0.03ms,which is better than EOP _ PCC one day UT1-UTC prediction accuracy.And,the daily routine UT1-UTC prediction in Beijing Aerospace Control Center is introduced.关键词
地球定向参数/UT1-UTC 预报/差分处理/AR 模型/潮汐项改正Key words
Earth orientation parameters/UT1-UTC prediction/dual differential/AR model/earth zonal harmonic tidal correction分类
天文与地球科学引用本文复制引用
陈略,唐歌实,胡松杰,平劲松,许雪晴,夏金超..高精度 UT1-UTC 差分预报方法研究[J].深空探测学报,2014,(3):230-235,6.基金项目
国家自然科学基金(41304026) （41304026）
国家重点基础研究发展计划(973计划)项目(2015CB857101) （973计划）
