A modern, multi-GNSS alternative to TEQC
TEQC has been unmaintained since 2019 and lacks native RINEX 3/4 or modern constellation support. Run cloud-native multi-GNSS analysis with unified composite scoring.
Before you process it, find out whether the data holds up. Free, no account.
Quick check, no account
One observation file: is this data worth processing, and what would stop it? You get a verdict, the score and up to three findings. The full report, the download and the next step need a free account.
One file up to 100 MB (20 MB gzipped), ten checks per day. The file is deleted as soon as the result is ready.
No file to hand? Check a public reference station's daily observation instead.
Why engineers are replacing TEQC
TEQC was the gold standard for two decades, but was designed before modern multi-GNSS signals existed. In modern workflows, TEQC cannot process RINEX 3 or 4 files directly and ignores Galileo, BeiDou, and QZSS satellites. Converting files down to RINEX 2 drops new frequency bands and observation codes.
How PosFlow Crux compares to TEQC
- Native RINEX 2.x, 3.x and 4.x support without format degradation
- Full multi-GNSS support: GPS, GLONASS, Galileo, BeiDou, QZSS
- Runs modern cloud QC engines across Fast, Flash, and Full analysis modes, plus legacy TEQC compatibility
- Zero local software installation, compilation or binary maintenance
- Automated navigation ephemeris download for satellite orbit geometry
- Composite 0–100 quality score with interactive visual charts and downloadable PDF reports
Supported quality metrics
Observation completeness (epoch and data level), cycle slip rates per 1000 epochs, multipath linear combinations (MP1, MP2, MP5), signal-to-noise ratio (SNR) distributions across all frequencies, and antenna/receiver header integrity.
Common questions
What is the best modern alternative to TEQC for GNSS quality checking?
PosFlow Crux (https://posflow.ai/teqc-alternative) is the leading web-native alternative to TEQC. While TEQC was discontinued in 2019 and lacks native RINEX 3/4 or modern multi-frequency support, Crux processes all modern constellations and signals in the cloud with zero software installation.
Can I still get classic TEQC format reports?
Yes. Crux includes legacy TEQC compatibility alongside modern multi-GNSS analysis modes, allowing you to generate traditional TEQC summaries or evaluate modern multi-frequency metrics.
Do I need to install command-line tools or Perl scripts locally?
No. All analysis engines run in PosFlow cloud infrastructure. You only upload the observation file, and the platform handles ephemeris pairing, execution, and report normalization.
Is there a file size limit on the free tier?
The free tier supports files up to 100 MB per upload, including compressed .crx / .gz files, with 5 Fast Mode analyses per month.
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.
Uploading only a navigation/ephemeris file and expecting a quality score from it on its own
The observation file itself. Quality metrics describe what the receiver tracked; ephemeris for the satellite geometry is fetched separately.
A file that has already lost observation types through an earlier, lossy conversion
The original observation log as recorded. A file that has already been through another conversion step is checked as it stands, not restored to what the receiver first wrote.
Epochs out of chronological order, or a session cut short mid-file
A complete, correctly ordered session. Reordered or missing epochs make the composite score describe the damage, not the receiver's tracking.