Differential correction can be applied to the mobile GNSS receiver measurements to eliminate most errors. atmospheric) are similar across wide areas. In general, correction works because most error sources (e.g. real-time) or after measurements are collected (i.e. ![]() Corrections can be done as soon as measurements are made (i.e. In this process the difference between the measured and the true distance between a known location (a base station) and a satellite is calculated and then applied to GNSS measurements as a “correction”. The most common way of achieving high accuracy is through a process called differential correction. That is, how do we achieve high accuracy in GNSS data collection and what are the important geodetic considerations in that process? Geodetics in Differential Correction Now that we’ve covered the basics of coordinate systems and geodetic topics relevant to GIS data collection, we can start to look at common configuration problems and how they manifest themselves in your data.īut first, we need to cover one last educational topic, and it is perhaps the most important one. ![]() Part 2: Common problems with coordinate system configurations “Why does my data look that way?”
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