OPUS Alternatives

📌 Problem

OPUS is down. How can I submit a base station file to obtain a coordinate for that survey nail/reference mark, which can then be entered into the Survey Nail Manager for processing sensor trajectory solutions.

🧠 What is OPUS

OPUS is an online GNSS static data post-processing service. NOAA's Online Positioning User Service (OPUS) provides free access to high-accuracy National Spatial Reference System (NSRS) coordinates. 

🔍 Root Cause

OPUS is occasionally unavailable due to government shutdowns or system upgrades, so the following alternatives can be used to post-process your static GNSS observations to obtain your survey nail/reference mark positions.

✅ Probable Resolutions

1. Trimble CenterPoint RTX post-processing service
   • Hosted by Trimble, this service is free but does require an account to login to use the website.
   • Recommended: Use the Computed using Trimble CenterPoint RTX option integrated directly into LP360's Trajectory Processing Wizard removing the need to enter the coordinates for that survey nail/reference mark, which can then be entered into the Survey Nail Manager  
   • Can also be run from within a POSPac project generated by LP360.
   • Review the prerequisites.
2. CSRS-PPP
   • Canadian Spatial Reference System (CSRS) Precise Point Positioning (PPP) is a service provide by Natural Resources Canada.
   • The service is free, but an account is required to login and submit your observation.
3. AUSPOS
   • AUSPOS is a free online GNSS data processing service provided by Geoscience Australia.
   • No Account is needed to use AUSPOS.