1. ISTCGCAP
  2. All Volumes and Issues
  3. Volume 79, 2014
  4. A posteriori optimization of accuracy and reliability of active geodetic monitoring network of the Dniester HPP

A posteriori optimization of accuracy and reliability of active geodetic monitoring network of the Dniester HPP

ISTCGCAP.
2014;
Volume 79, Number 79
: pp. 5 - 14
Received: February 02, 2014
Accepted: March 24, 2014
Authors:
  1. Kornyliy Tretyak
  2. J. v. Cranenbroeck
  3. A. Yu. Balan
  4. O. V. Lompas
  5. Ihor Savchyn
1
Department of Higher Geodesy and Astronomy of Lviv Polytechnic National University
2
CGeoS sprl-s – Creative Geo Sensing
3
Representative Office Leica Geosystems AG in Ukraine
4
Lviv Polytechnic National University
5
Lviv polytechnic National University

Aim. To work out the methods for the a posteriori optimization of measurement results of active geodesic networks of monitoring with taking into account the parameter of accuracy and reliability. To verify experimentally its trustworthiness on the active precision geodesic network of monitoring the Dniester HPP. Methodology. Filtering the measurement results of active geodetic monitoring networks is alternate exclusion of vectors with maximum corrections, which are determined from successive iterations of network adjustment. After each iteration it’s determined the mean square error of unit weight and the parameter of network reliability. Sifting vectors with maximal errors leads to accuracy improving and reliability deterioration of network. That’s why we need to identify a group of vectors in which the correlation of the accuracy and reliability of the network is optimal. To determine the optimal quantity of vectors the entropic approach is used. Results. It is developed the technique of a posterior optimization of measurement results of active geodesic monitoring networks with taking into account the parameters of accuracy and reliability. The trustworthiness of the developed method while processing the results of daily measurements accomplished by automated monitoring system of the Dniester HPP was experimentally verified. Originality. It is proposed a new technique for a posterior optimization of measurement results of active geodesic monitoring networks with taking into account the parameters of accuracy and reliability. Using entropy approach the group of vectors in which the value of accuracy and reliability is optimal is defined. Practical significance. Using the developed method a posteriori optimization of active precision geodesic monitoring network of the Dniester HPP performed. The represented method can also be used for the optimization of any active geodesic monitoring networks with large number of redundant measurements.

active geodetic monitoring networks
parameter of reliability
a posterior optimization of geodetic networks
  1. Rodionova Yu.V., Dyakov B.N. O povyshenii nadezhnosti nekotorykh geodezicheskikh postroeniy [About improving the reliability of some geodesic constructions]. Geoprofi, 2004, issue 4, pp. 48-50.
  2. Rodionova Yu.V. Optimizatsiya planovoy geodezicheskoy seti goroda N po kriteriyu geometricheskoy nadezhnosti [Optimization of planned and geodetic network of the city N by geometric reliability]. Vestn. SGGA [Bulletin of SGGA]. 2006, issue 11, pp. 125-129.
  3. Tretyak K.R. Aposteriorna optymizacija gheodezychnykh merezh [Posteriori optimization of geodetic networks]. Zb.: “Suchasni dosjaghnennja gheodezychnoji nauky ta vyrobnyctva” [Journal: “Modern geodesic advances of science and industry”]. Lviv: Liga-Pres, 2003, pp. 127-141.
  4. Tretyak K.R. Uzaghaljnenyj kryterij optymizaciji gheodezychnykh merezh [Generalized criterion of optimization of geodetic networks]. Gheodezija, kartoghrafija i aerofotoznimannja [Geodesy, Cartography and Aerial Photography]. Lviv, 1993. vol. 55, pp. 93-102.
  5. Tretyak K.R., Savchyn I.R. Do pytannja nadijnosti aktyvnykh monitorynghovykh merezh [On the issue of reliability of active geodetic monitoring networks]. Gheodezija kartoghrafija i aerofotoznimannja [Geodesy, Cartography and Aerial Photography]. Lviv, 2013, vol. 77, pp. 122 – 126.
  6. Tretyak K.R., Savchyn I.R. Rozroblennja metodyky rozrakhunku nadijnosti aktyvnykh monitorynghovykh merezh [Reserch of reliability of active geodetic network for deformation monitoring]. Visnyk gheodeziji ta kartoghrafiji [Bulletin of Geodesy and Cartography]. Kiew: NDIGhK, 2013, vol. 1 (82), pp. 5-10.
  7. Fedorov V.V. Teoriya optimalnogo eksperimenta [Theory of optimal experiments]. Moskow: Nauka [Science], 1971. – 312 p.
  8. Even-Tzur G. GPS vector configuration design for monitoring deformation networks. Journal of Geodesy, november, 2002, vol. 76, no. 8, pp. 455-461.
  9. Craenenbroeck J.v. Engineering Structures First International FIG Workshop. Hong Kong, International Federation of Surveyors (FIG), Belgium, 2012, pp. 1 – 18.
  10. Knight N.L., Wang J., Rizos C. Generalised measures of reliability for multiple outliers. Journal of Geodesy, October, 2010, vol. 84, no. 10. pp. 625-635.
  11. Prószynski W. Another approach to reliability measures for systems with correlated observations. Journal of Geodesy, September, 2010, vol. 84, no. 9, pp. 547 – 556.
  12. Rizos C., Craenenbroeck J.v., Liu V. Advances in GNSS-RTK for Structural Monitoring in Regions of High Ionospheric Activity. Deformation Measurement of Structures Using GNSS, FIG Congress 2010. Facing the Challenges. Building the Capacity, 11-16 April, 2010, Sydney, Australia, pp. 1-13.
  13. Stempfhuber W., Alberding J. Geodätische Monitoringsysteme mit RTK Low-Cost-GNSS, Allgemeine Vermessungs-Nachrichten: AVN, 2012, vol. 119, no. 4, pp. 132-139.