Keywords
ITRF2020
PPP
CORS
Việt Nam ITRF2014
ITRF2020
PPP
CORS
Vietnam
Working Languages
How to Cite
Abstract
The product package of CODE supports PPP-AR GPS+GALILEO with satellite orbit every 5 minutes and satellite attitude every 15 minutes. However, these products do not give us the best PPP accuracy [18]. To find out if this problem is caused by satellite attitude, we used PPP to process 90 days of data from January 1, 2022, to March 31, 2022, for 4 permanent GNSS stations in Southeast Asia according to 2 options to replace the CODE satellite attitude file: using the nominal satellite attitude and using the GFZ's satellite attitude file with an interval of 30 seconds. The results show that the PPP accuracy of the two options is the same, and the improvement when using the CODE satellite attitude file is (12, 27, 8)%, respectively, in the North, East and Elevation components. Accuracy is also similar to when using CNES products. Therefore, we conclude that using satellite attitude files with an interval of 15 minutes is inappropriate because it reduces the accuracy of PPP.