A quality score, a coordinate solution and agreement between two solutions answer different questions. We keep those boundaries visible.
/api/v1/public/quick-check/sampleThe bundled DUND sample, checked in Fast Mode: every epoch present across 122 satellites in 5 constellations (GPS, GLONASS, Galileo, BeiDou, QZSS). Multipath scored 29/30 and cycle slips 10.5/30. Open the sample in the free check to see the latest computed result.
How the quality score is calculatedApex Duo runs two independent processing engines on the same uploaded observation set, then compares matched station coordinates. It is separate from the Fast Mode quality check. Both sides must return usable results for a two-sided comparison; an absent solution is not agreement.
Read the processing method and capability limitsThe approved Apex Duo agreement threshold is 20 mm in three dimensions per uploaded station. The run is within threshold only when every uploaded station has a two-sided comparison at or below that difference. Added reference stations are informative, not the deciding population. The threshold determines the agreement conclusion, not permission to publish a solution.
The initial approval used 14 samples, below the planned 20-sample gate: eight uploaded stations in live runs and six acceptance pairings. The owner accepted that limited evidence. It is not independent certification or a promise that future uploads will agree.
Two solutions can share errors in input data, station metadata or reference-frame assumptions. Agreement does not establish external accuracy, legal suitability or fitness for a deliverable. Check frame, epoch, antenna setup and independent control. We publish failure rates and charging boundaries so you can decide whether a run is appropriate.
View live status and methodologyRefund boundaries