Precision Evaluation and Consistency Analysis of iGMAS Orbit and Clock Products

• 作 者: SumeiYu[1]TianheXu[2]
• 机 构: School of Geology Engineering and Surveying, Chang'an University, Xi'an, Shanxi, China
• 出 处: 第七届中国卫星导航学术年会
• 发表日期: 2016年期

　　This paper evaluates the precision of iGMAS orbit and clock products,and analyzes their consistency.By the methods of orbit comparisons and day boundary discontinuities (DBDs),the iGMAS orbit precision is evaluated.The twice difference method is used to evaluate clock precision.On the basis of precision analysis,consistency of orbit and clock products from different analysis centers (AC) were compared by precise point positioning (PPP) technique.The quality of orbit,clock and GNSS observation would have a large impact on the accuracy of PPP.Therefore,the experimental data for consistency analysis includes MGEX station observation data with good quality,and the orbit / clock products with comparable precision.Using the proposed method,precision and consistency of iGMAS orbit and clock products from different AC is analyzed.