Statistical Analysis in 20xx

摘要

This paper deals with the statistic of SLR tracking since 2000, trying to see if there are changes in data quantity and quality which can influence the results for station coordinates and velocities and the definition of the origin and scale of the ITRF. We also had a look into the distribution of tracking data between northern and southern hemisphere, day and night, and identified a weekend effect. An other aspect were the quality of the new Khz systems. For our analysis we used the statistical information available at the ILRS Web-pages and results from the processing of SLR tracking data to the Lageos and Etalon satellites at DGFI.