OPUS: Online Positioning User Service

[ ✓ ] BETA test underway! Try processing multi-GNSS constellations!

Try BETA OPUS-S v5.0.0 to process GLONASS, Galileo, Beidou, QZSS, and preview new report formats!

sample solutions

Upload your data file.

Solve your GPS position & tie it to the National Spatial Reference System.
What is OPUS? FAQs

* data file of dual-frequency GPS observations. sample

antenna - choosing wrong may degrade your accuracy.

meters above your mark.
antenna height of your antenna's reference point.

* email address - your solution will be sent here. Privacy Act Statement

to customize your solution.

formats		formats explained
base stations	Use: Exclude:	identify any CORS you wish to explicitly 'Use' or 'Exclude' from your solution by typing in 4-char site IDs separated with line break -- sample -- find site IDs -- NCN PloTS
state plane	your SPCS zone
project identifier		enter the id provided by your project manager
my profile		customize OPUS defaults for future solutions
share my solution		sharing explained
	Please wait 24 hours after taking your GPS observation to be able to share your solution

for data 15 min. - 2 hrs. for data 2 hrs. - 48 hrs.

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