Related Experiment Video
Updated: Sep 30, 2025

Measuring and Mapping Patterns of Soil Erosion and Deposition Related to Soil Carbonate Concentrations Under Agricultural Management
Published on: September 12, 2017
Garmin GPSMAP 66sr: Assessment of Its GNSS Observations and Centimeter-Accurate Positioning
Lambert Wanninger1, Anja Heßelbarth1, Volker Frevert1
1Geodätisches Institut, School of Civil and Environmental Engineering, Technische Universität Dresden, D-01062 Dresden, Germany.
Abstract:
In 2020, Garmin released one of the first consumer devices with a dual-frequency GNSS chip and a quadrifilar helix antenna: GPSMAP 66sr. The device is intended to serve as a positioning and navigation device for outdoor recreation purposes with positioning accuracies on the few meter level. However, due to its highly accurate GNSS dual-frequency carrier-phase observations, the equipment can also be used for centimeter-accurate positioning. We performed extensive test measurements and analyzed the quality of its code and carrier-phase observations. We calibrated the Garmin GPSMAP 66sr antenna with respect to its phase-center offset and phase-center variations. We also performed dual-frequency GPS/Galileo precise point positioning (PPP) and precise relative positioning in baselines to virtual reference stations (VRS). We demonstrate and explain how centimeter-accurate positioning can be achieved with this novel kind of equipment.
Related Concept Videos
Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device
Field Application of Global Positioning System
Types of Global Positioning System Surveys
Errors in Global Positioning System
Introduction to Global Positioning System
Geoid and Ellipsoid

