Practical Measurement of GNSS Technologies from EMLID and SOKKIA Receivers and their Comparison

The practical measurement and comparison of GNSS technologies from SOKKIA and EMLID receivers is only a demonstration of how GNSS surveying technology with accuracy of a few centimetres can be used effectively in conditions of the Czech Republic. Czech surveyors use GNSS technology primarily as a simple data collection in open terrain - it cannot be used in buildings. Most often they are simple measurements such as terrain surveying for the designer, surveying for the purposes of land registry, laying out constructions and others. There are several methods for determination of position, i.e. location in defined reference coordinate and height systems (in the Czech Republic they are S - JTSK and Bpv), according to receiver’s software using networked RTK method (corrections from providers of network of reference stations - such as TOPNET, CZEPOS, and others) or RTK base – rover method or fast static method. The task is to compare the measurement time intervals from each technology and the accuracy of the measurement on the known points of the Czech national trigonometric network. At the end the financial comparison of both technologies is presented.