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What explains the difference between RTX and OPUS? (Portland OR)

Question asked by Rick Belliveau on May 11, 2020
Latest reply on May 21, 2020 by Robert Hoy

In the Portland Oregon area we have been seeing considerable differences between CenterPoint RTX positions and OPUS positions. I tested the difference rigorously by running rixex data for a local CORS station "JIME" which are collected in one hour intervals at 5 second epochs. When I had imported over half a dozen RTX and OPUS files for the same station at different times on the same day a pattern emerged. In general the OPUS positions were clustered closer and just south of the data sheet position while the CenterPoint RTX positions were northeasterly almost 0.4 feet! Reference frames, epochs etc seem the same. I should mention that the northeasterly direction matches closely with plate motion here in the northwest. Help would be appreciated!!! r2 gnss rtx rtk surveying accuracy opus centerpoint rtx 

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