Satellite count and signal quality: what to check together
A larger satellite count can help availability, but useful observations must also be healthy and well distributed.
Read articleGNSS knowledge.
Ready for the field.
Fifty practical articles on satellite positioning, RTK corrections, survey procedures and reliable geospatial data.
25–36 of 50 articles
Page 3 of 5The ionosphere and GNSS: why conditions can change
The ionosphere affects radio-signal propagation and can change the behavior of precise positioning.
Read articleTropospheric delay and GNSS height measurements
The lower atmosphere affects GNSS signals, and height estimation needs careful modeling and field checks.
Read articleCycle slips: what interrupted phase tracking can change
Loss of continuous carrier-phase tracking can require ambiguities to be resolved again.
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Coordinate reference systems and datums for GNSS surveys
Coordinates need a reference frame, units and height definition to be interpreted correctly.
Read articleUTM coordinates: zones, hemispheres and common export mistakes
A UTM easting and northing need the correct zone, hemisphere and datum.
Read articleEllipsoid, geoid and orthometric height: keeping elevations consistent
The height computed from GNSS is not automatically the elevation required by an engineering project.
Read articleLocal site calibration: connecting GNSS to project coordinates
A local transformation should be built from trustworthy control and tested on independent points.
Read articleReference frames and coordinate epochs: why dates matter
A precise coordinate may need both a frame realization and an epoch.
Read articleGrid vs ground distances: avoiding a layout mismatch
A distance on a projected coordinate grid is not always the same as a measured ground distance.
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IMU tilt compensation: benefits and verification
A tilt-capable receiver estimates the relationship between the antenna and pole tip; the setup still needs checking.
Read articleLaser GNSS: measuring points that are difficult to approach
A laser-capable GNSS workflow combines receiver positioning with another measurement, so both parts need validation.
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