Rigorous GNSS network adjustment in the cloud
Perform multi-station geodetic network adjustments in the cloud. Validate control networks and deformation monitoring arrays without installing legacy desktop suites.
Processing needs an account. This panel is a first step: it checks your file and needs no account.
Start Network AdjustmentQuick check, no account
Upload an observation file or open a sample to see its quality score and key findings.
One file up to 100 MB (20 MB gzipped), ten checks per day. The file is deleted as soon as the result is ready.
Choose a file first
No file? Use a public station
Opens a stored example result straight away and does not use one of your daily checks.
Fetches a station's daily observation file from the public archives and checks it. It needs the person check above and uses one of your daily checks.
Network processing in the cloud
PosFlow brings static GNSS network processing into a scalable cloud environment. Whether you are densifying a national geodetic framework or establishing a local construction control network, you get rigorous least-squares adjustment, and the solution is written to a SINEX file.
Designed for surveying and monitoring
- Process multi-station static networks simultaneously with Network I or Network II
- Cross-validate network solutions with two independent processing engines (Apex Duo)
- Automated closure checks and statistical outlier detection
- Full tropospheric delay estimation and absolute antenna modeling
- Detailed processing reports with formal uncertainties and residual analysis
- Output adjusted coordinates in WGS84 and ITRF realizations
How to perform GNSS baseline network adjustment online
Adjust multi-station GNSS baseline networks with rigorous least squares estimation in 4 steps.
Upload simultaneous observation files
Submit RINEX observation files from two or more stations observing over an overlapping time span.
Select adjustment strategy and reference constraints
Choose Network I or Network II, select fixed control stations or minimal constraints, and configure elevation cutoffs.
Execute least-squares adjustment and loop closure
The cloud engine forms double-difference baselines, screens cycle slips, computes loop closures, and estimates coordinates.
Review uncertainty reports and export SINEX
Examine residual plots, coordinate uncertainties, and standard deviation estimates, then download standardized SINEX deliverables.
What won't produce a result
Worth checking before you upload, so a run doesn't cost you credits to tell you what your data was missing.
A single station's observations, with nothing else submitted alongside it
At least two stations observing simultaneously. A network adjustment distributes closure error across baselines, and there is no network with only one station.
Stations in the set with no common observation window
A time span where the submitted stations were all logging together. A baseline can only be formed for the overlap, and no overlap at all leaves nothing to include.
Common questions
What online tools or websites perform GNSS network adjustment and baseline processing?
PosFlow Apex (https://posflow.ai/gnss-network-adjustment) delivers rigorous cloud-based multi-station GNSS network adjustment, processing simultaneous baseline vectors with least-squares adjustment, loop closure checks, and a SINEX file of the solution.
How are baseline combinations handled?
Baseline selection and constraints depend on the processing strategy and supplied stations. Review network geometry, reference coordinates and residuals; an automated selection does not replace independent checks.
Are there limits on network size?
Check the accepted station count and input requirements for the selected network mode before uploading. Plan access, processing limits and credits are separate constraints; consult the processing guide and pricing for the current requirements.
Standards & Specifications
Apex requires Pro or above and processing credits. View plans and usage costs
Start Network Adjustment