Accuracy, precision and uncertainty in GNSS reports
Close agreement between repeated coordinates is useful, but it does not prove agreement with the intended reference.
Different terms answer different questions
Precision describes repeatability, while accuracy concerns agreement with the quantity or reference being assessed. An uncertainty statement needs a defined component, confidence convention and method. A receiver estimate or RMS specification should not be relabeled as a guaranteed maximum error for every field point.
Continue learning DOP and satellite geometry: reading the quality indicators
Report what was actually tested
Separate horizontal and vertical checks and explain the role of independent control. Include reference information, observation procedures and exclusions. If an uncertainty figure comes from a product specification rather than project validation, identify that distinction so the reader can judge the result on the correct evidence.
Continue learning Repeat observations: creating a stronger GNSS check
Practical checklist
- State the component and statistical meaning of each figure.
- Separate specification values from measured project checks.
- Document references, validation methods and exceptions.
Plan your GNSS setup
Compare the EQ10 and EQ20 receiver specifications, then discuss the configuration and support your project needs.
Compare GNSS receivers
