![OPUS: the Online Positioning User Service, process your GNSS data in the National Spatial Reference System OPUS: the Online Positioning User Service, process your GNSS data in the National Spatial Reference System](https://geodesy.noaa.gov/sitemsgs/OPUS/about/images/ant_hgt_BBBK23.png)
OPUS: the Online Positioning User Service, process your GNSS data in the National Spatial Reference System
![OPUS: the Online Positioning User Service, process your GNSS data in the National Spatial Reference System OPUS: the Online Positioning User Service, process your GNSS data in the National Spatial Reference System](https://geodesy.noaa.gov/sitemsgs/OPUS/about/images/accuracy-duration.gif)
OPUS: the Online Positioning User Service, process your GNSS data in the National Spatial Reference System
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![OPUS: the Online Positioning User Service, process your GNSS data in the National Spatial Reference System OPUS: the Online Positioning User Service, process your GNSS data in the National Spatial Reference System](https://geodesy.noaa.gov/sitemsgs/OPUS/about/images/OPUS-concept_small.png)