GNSS vs GPS: what surveyors need to know
GPS is one satellite constellation. GNSS describes the wider positioning ecosystem, including Galileo, BeiDou and GLONASS.
Read articleGNSS knowledge.
Ready for the field.
Fifty practical articles on satellite positioning, RTK corrections, survey procedures and reliable geospatial data.
1–12 of 50 articles
Page 1 of 5Why multi-constellation GNSS matters
More constellations can improve observation availability, especially where part of the sky is obstructed.
Read articleMulti-frequency GNSS: beyond the L1 label
Multiple frequencies provide additional observations and help separate some atmospheric effects from geometric distance.
Read articleCode and carrier phase: two GNSS measurements
Code measurements provide a range estimate; carrier phase enables precise relative positioning when its ambiguities are resolved.
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How RTK GNSS turns observations into precise positions
RTK combines simultaneous base and rover observations with a real-time data link.
Read articleRTK Fixed vs Float: what the status means
Fixed and float describe ambiguity handling, not a guarantee that every coordinate is correct.
Read articleRTK vs PPK: choosing when to process corrections
RTK provides results during collection. PPK computes positions afterward from recorded observations.
Read articleStatic and rapid-static GNSS surveys explained
Stationary observation methods need a session plan tied to baseline, geometry, obstructions and required uncertainty.
Read articlePPP vs RTK: different routes to precise GNSS
Precise Point Positioning and RTK use different correction and estimation strategies.
Read articleWhat SBAS adds to satellite positioning
Satellite-based augmentation provides correction and integrity information, but it is different from a local RTK workflow.
Read articleBase and rover setup: getting the relationship right
A precise relative measurement still depends on the base position, antenna setup and coordinate settings.
Read articleChoosing a suitable GNSS base station site
A base location should support stable mounting, useful sky visibility and reliable communication.
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