FLUX
Format Conversion
Native converters for u-blox, Septentrio, Trimble, Leica, Topcon, NovAtel, and Javad raw receiver logs into standard RINEX 2/3/4, with Hatanaka compression and batch pipelines.
About PosFlow
Unified in the cloud, from signal to truth
PosFlow is the cloud-native geodetic processing platform for surveying and geophysics professionals. Unifying format conversion, deep quality analysis, precise positioning, and datum transformation into one traceable workspace.
Engineering heritage
Built by a GNSS team
PosFlow is built by a team of GNSS professionals. Its founder worked at Leica Geosystems and Qianxun SI, on GNSS and CORS projects, in project management, technical support, system testing and issue management.
PosFlow covers four kinds of GNSS work from a web browser, with nothing to install: data quality analysis, data format conversion, high-precision processing (PPP, PPK and network solutions), and coordinate system conversion and transformation. It addresses problems that are common in this work: TEQC is no longer maintained, raw receiver formats differ by vendor, and cycle slips or multipath found after processing mean running it again.
Core capabilities
Four tools covering the GNSS workflow
Leave behind unsupported legacy binaries, isolated tools, and manual ephemeris downloads. From raw binary ingest to final coordinate delivery, work entirely in one unified cloud workspace.
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CRUX
Quality control
Modern replacement for unmaintained TEQC. Multi-GNSS 0-100 composite scoring, epoch completeness, cycle slip tracking, multipath MP1/MP2 estimation, and SNR elevation profiles.
APEX
Precise positioning
Automated precise orbit/clock retrieval for static and kinematic PPP, drone and vehicle PPK baselines, multi-station network adjustment, and Apex Duo, which compares two independent processing engines on static PPP and static networks.
AXIS
Coordinate transformation
Rigorous geodetic transformations across CGCS2000, WGS84, ITRF realizations, and Gauss-Kruger / UTM projections with full EPSG parameter lineage.
Processing pipeline
A closed-loop geodetic workflow
Each phase hands its result to the next, so data problems can be caught before processing and the final coordinates can be traced back to their inputs.
01FLUX Conversion
Raw Ingestion & Standardization
Upload heterogeneous multi-vendor raw binary logs. Receiver chips and formats are automatically identified and converted to clean RINEX 2/3/4 or CRX.
02CRUX Gatekeeping
Pre-Processing QC
Screen observation files before intensive computation. Detect tracking gaps, cycle slip spikes, multipath, and clock anomalies to filter unviable sessions.
03APEX Positioning
High-Precision Geodetic Solving
Automatically pair with IGS and CODE precise orbits. Solve PPP, PPK trajectories, or network adjustments. Apex Duo runs two independent processing engines on static PPP and static network data and compares the results.
04AXIS Delivery
Datum Projection & Delivery
Transform geocentric coordinates into national survey datums (CGCS2000, ETRS89) or local projected grids with exportable audit reports.
Core values
What drives us
Verifiable precision
Every result carries traceable residuals and quality indicators. No black boxes.
Learn more →Speed, as measured
Quality checks usually finish while you wait. Positioning and network jobs take longer and run in a queue. The status page publishes the current median times.
Learn more →Open standards
RINEX 2/3/4, RTCM, SP3, SINEX: we support the formats listed on the Products page.
Learn more →Transparent pricing
Pay per task or choose a plan. No hidden compute charges, no surprise invoices.
Learn more →Common questions
Capabilities & applications
How does PosFlow differ from desktop GNSS tools like TEQC, RTKLIB, or TBC?
Traditional desktop software requires local installation and manual ephemeris downloads from CDDIS/IGS, and TEQC is no longer maintained. PosFlow is a cloud platform that brings format conversion, multi-GNSS QC, PPP/PPK solving, and coordinate transformation together, used from a web browser.
What GNSS raw data formats can PosFlow convert?
Via Flux, PosFlow natively ingests u-blox (.ubx), Septentrio (.sbf), Trimble (.dat, .t02), Leica, Topcon, NovAtel, and Javad logs, converting them to RINEX 2.11, 3.04, or 4.02 with optional Hatanaka compression.
What post-processing scenarios does Apex support?
Apex handles long-session static PPP, kinematic PPP for moving platforms, baseline PPK for drone photogrammetry and mobile mapping, and multi-station control network adjustments. Static solutions report a formal standard deviation for each coordinate, PPK trajectories report per-epoch sigmas, residual plots and a satellite timeline, and network solutions are written to a SINEX file.
Does PosFlow support national datums like CGCS2000 and local grids?
Yes. Axis supports 3D datum transformations between WGS84, CGCS2000, and ITRF realisations, along with Gauss-Kruger 3°/6° projection zones, UTM, and the full EPSG coordinate registry for single points or batch CSV files.