Nov 17, 2025 · * required fields We may use your data for internal evaluations of OPUS use, accuracy, or related research.

Nov 17, 2025 · What is OPUS? NOAA's Online Positioning User Service (OPUS) provides free access to high-accuracy National Spatial Reference System (NSRS) coordinates. OPUS uses the same …

Feb 20, 2026 · OPUS Projects has been successfully updated to work in the new International Terrestrial Reference Frame of 2020 (ITRF2020). For projects created before this update that are in …

Nov 17, 2025 · NEW: Due to network maintenance on Saturday 21 February 2025, OPUS will be offline for most of the day.

Feb 21, 2007 · OPUS Usage Currently there are about 15,000 OPUS solutions per month...In the first two weeks after OPUS-RS was announced there were about 2000 OPUS-RS solutions produced.

Welcome to the OPUS Share Map. This provides a view of the many OPUS Share solutions and is updated nightly.

OPUS Solution results can be found in an email sent to the project manager, as well as to the email address used to upload the GNSS observation file. They can also be found within the project, by …

Observe longer: A longer session provides OPUS a better opportunity to accurately fix ambiguities and mitigate multipath error. The figure below shows the correlation between session duration and …

OPUS provides the user the means to obtain accurate coordinates while operating a single GPS receiver. A popular utility, OPUS is now processing over 20,000 user-submitted data sets per month.

If the file format is not recognized, OPUS will show a file upload error. In that case, refer to your vendor for tools to convert your proprietary file format to the Receiver Independent EXchange format (RINEX).