Abstract
Real-time kinematic (RTK) technique is important for mapping applications requiring short measure time, the distance between rover and base station, and high accuracy. There are several RTK methods used today such as the traditional RTK, long base RTK (LBRTK), network RTK (NRTK), and precise point positioning RTK (PPP-RTK). NRTK and LBRTK are popular with the advantage of the distance, the time, and accuracy. In the present study, the NRTK and LBRTK measurements were compared in terms of accuracy and distance in a test network with 6 sites that was established between 5 and 60 km. Repetitive NRTK and LBRTK measurements were performed on 6 different days in 2015-2017-2018 and additionally 4 campaigns of repetitive static measurements were carried out in this test network. The results of NRTK and LBRTK methods were examined and compared with all relevant aspects by considering the results of the static measurements as real coordinates. The study results showed that the LBRTK and NRTK methods yielded similar results at base lengths up to 40 km with the differences less than 3 cm horizontally and 4 cm vertically.
Highlights
Nowadays, it is possible to get accurate and precision coordinates anywhere in seconds thanks to global navigation satellite system (GNSS) technology [1, 2]
A test network with 6 sites was established to see the differences between long base real-time kinematic (LBRTK) and network realtime kinematic (NRTK)
The LBRTK and NRTK measurements were made in this test network in 2015 (4 days), 2017, and 2018
Summary
It is possible to get accurate and precision coordinates anywhere in seconds thanks to GNSS technology [1, 2]. Some methods to get accuracy and precision are long base real-time kinematic (LBRTK), network realtime kinematic (NRTK), and precise point positioning real-time kinematic (PPP-RTK). With real-time satellite orbit and clock corrections, several PPP services have been developed so far and PPP-RTK is one of the services. In PPP-RTK method, data of the single GNSS receiver are evaluated with different corrections like precise satellite orbits and clocks, ionospheric delays, and satellite phase biases to compute receiver’s position with cm accuracy. Solution of ambiguity resolution quickly and effectively has a big importance for the PPP-RTK technique and several methods have been developed for the solution. Long solution time of ambiguity resolution is a problem for the use of PPP-RTK technique in instant applications requiring high accuracy [3,4,5]
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