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AN EFFECTIVE APPROACH TO APPLYING PRODUCTS FROM GNSS CORS NETWORKS IN GEODETIC PRACTICE
Abstract
The issues related to the use of products generated from Continuously Operating Reference Station (CORS) for precise positioning are the main focus of the study. Geodetic measurements were conducted at a real site, and different types of data provided by commercial CORS networks were compared - Network Real Time Kinematic (Network RTK) via VRS, generated data for subsequent processing (Virtual Rinex), and raw data from a physical station. The current national regulations, as per [1] , were adhered to, and the aim is to expand the methodology for applying a faster and more efficient approach to determining points in geodetic control networks, ensuring high reliability and accuracy through a comparative analysis. The construction of geodetic control networks (GCN) and working geodetic bases (WGB) is an essential and integral part of designing and constructing any type of infrastructure projects. In geodetic practice, GNSS determinations are most commonly relied upon as a fast and effective method. For almost all applications, the points determined with GNSS are considered without errors, thus realizing the geodetic coordinate system for the project. With the development of technology and the construction of CORS networks, Network RTK has become the most commonly applied method due to the accessible and easy acquisition of the final result (coordinates of the determined points). However, its application often does not lead to reliable results. On the other hand, the Virtual Rinex product is not widely popular among the geodetic community, though it is not inferior in terms of cost-effectiveness. Some studies on its application have been published in [2] , but its application is not embedded in any regulatory document in the Republic of Bulgaria.
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References6
Instruction No. RD-02-20-25 of September 20, 2011, for determining geodetic points using global navigation satellite systems, Ministry of Regional Development and Public Works, Bulgaria.
Tsanovski, Yu., GNSS - Good Geodetic Practices, Monography, Paint Box Creative, 132 pages, 2023, ISBN: 978 619 92689-0-2
Decree of the Council of Ministers No. 153 of 29 July 2010 and Regulation No. 2 of 30 July 2010 on the definition and maintenance of the Bulgarian Geodetic System 2005 (BGS2005).
The Instruction for Shenazh and Reperazh from 2005.
Kostadinov, K., Valchinov, V. Mathematical Processing of Geodetic Measurements, Sofia, 2012.
Sl. Gospodinov, E. Peneva, P. Penev, T. Lambeva, Yu. Tsanovski, S. Dzhorova, G. Marinov. I. Radev, Contemporary Aspects of Geometric Leveling, Yearbook of UACEG Sofia 2016, Volume 49, Issue 4, pp. 9-23, ISSN 1310-814X, ISSN 2534-9759
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