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Understanding Non-USB GNSS Receiver Interfaces: RS-232, TTL/UART, and Connectors

Many non-USB GNSS receiver integrations use either RS-232 or TTL/UART. Both can carry GNSS data such as NMEA sentences, but they use different electrical signaling…
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How to configure the Columbus EX-1 as an RTK/PPK Base Station in a Production Environment

The accuracy of the RTK/PPK base station’s position is critical because any errors in its location will directly impact the rover’s absolute positioning accuracy. The…
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PPK (Post-Processed Kinematic) by using the Columbus EX-1 GNSS Data Logger

If real-time internet or radio connections between the rover and base station are limited or unavailable, or if immediate positioning results are not required, you…
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Why can’t you rely on some GPS/GNSS apps’ accuracy readings for multi-frequency GNSS Receivers?

Many apps on the market calculate accuracy based on a single-frequency satellite system, where the accuracy values are estimated using horizontal dilution of precision (HDOP)…
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Why GNSS Positions May Not Line Up with the Map

Customers may sometimes see a GNSS position appear several meters away from the expected place on a map. This can happen with many GNSS receivers,…
