Universal time from VLBI single-baseline observations during CONT08

被引：0
作者：
Tobias Nilsson
Johannes Böhm
Harald Schuh
机构：
[1] Vienna University of Technology,Institute of Geodesy and Geophysics
来源：
Journal of Geodesy | 2011年 / 85卷
关键词：
VLBI; Universal Time; Earth rotation; Tropospheric gradients;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The IVS Intensive sessions are single-baseline, 1-h VLBI sessions carried out everyday in order to determine Universal Time (UT1). We investigate different possibilities to improve the results of such sessions. We do this investigation by extracting 2-h single-baseline sessions from the CONT08 data set. These are analysed like normal Intensives, and the results are compared to the results of the analysis of the full CONT08 data set. We find that tropospheric asymmetry is the major error source for the single-baseline sessions. It is possible to improve the accuracy of the estimated UT1 either by using accurate a priori tropospheric gradients or by estimating gradients in the data analysis.
引用
收藏
页码：415 / 423
页数：8
相关论文
共 40 条
  • [1] Böckmann S(2010)VLBI terrestrial reference frame contributions to ITRF2008 J Geodesy 84 201-219
  • [2] Artz T(2007)Tropospheric gradients from the ECMWF in VLBI analysis J Geodesy 81 409-421
  • [3] Nothnagel A(2010)Asymmetric tropospheric delays from numerical weather models for UT1 determination from VLBI intensive sessions on the baseline Wettzell–Tsukuba J Geodesy 84 319-325
  • [4] Böhm J(1997)Sensitivity of UT1 determined by single-baseline VLBI to atmospheric delay model, terrestrial and celestial reference frames J Geodesy 71 253-261
  • [5] Schuh H(2010)Improved UT1 predictions through low-latency VLBI observations J Geodesy 84 399-402
  • [6] Böhm J(2010)Sub-diurnal Earth rotation variations observed by VLBI Artif Satell 45 49-55
  • [7] Hobiger T(2008)The impact of errors in polar motion and nutation on UT1 determinations from VLBI intensive observations J Geodesy 82 863-869
  • [8] Ichikawa R(1995)Assessment of the accuracy of daily UT1 determinations by very long baseline interferometry J Geophys Res 100 8193-8200
  • [9] Kondo T(1985)Daily Earth rotation determinations from IRIS very long baseline interferometry Nature 316 424-427
  • [10] Koyama Y(2007)The International VLBI Service for Geodesy and Astrometry (IVS): current capabilities and future prospects J Geodesy 81 379-387
1234