000193072 001__ 193072
000193072 003__ CZ-ZdVUG
000193072 005__ 20190130105046.0
000193072 044__ $$axxk
000193072 041__ $$aeng
000193072 040__ $$aABC039$$bcze
000193072 1001_ $$aVáclavovic, Pavel
000193072 24510 $$aBackward smoothing for precise GNSS applications
000193072 300__ $$a8 stran
000193072 5203_ $$9eng$$aThe Extended Kalman filter is widely used for its robustness and simple implementation. Parameters estimated for solving dynamical systems usually require certain time to converge and need to be smoothed by a dedicated algorithms. The purpose of our study was to implement smoothing algorithms for processing both code and carrier phase observations with Precise Point Positioning method. We implemented and used the well known Rauch-Tung-Striebel smoother (RTS). It has been found out that the RTS suffer from significant numerical instability in smoothed state covariance matrix determination. We improved the processing with algorithms based on Singular Value Decomposition, which was more robust. Observations from many permanent stations have been processed with final orbits and clocks provided by the International GNSS service (IGS), and the smoothing improved stability and precision in every cases. Moreover, (re)convergence of the parameters were always successfully eliminated. (C) 2015 COSPAR. Published by Elsevier Ltd. All rights reserved.
000193072 655_4 $$aclanky
000193072 653_0 $$aprecise point positioning$$aambiguity$$abackward smoothing$$aKalman filter$$aGNSS
000193072 7001_ $$aDouša, Jan
000193072 7730_ $$92015$$gVolume: 56  Issue: 8  Pages: 1627-1634 OCT 15 2015$$tADVANCES IN SPACE RESEARCH$$x0273-1177
000193072 856__ $$uurn:doi:10.1016/j.asr.2015.07.020
000193072 85640 $$uhttp://dx.doi.org.ezproxy.techlib.cz/10.1016/j.asr.2015.07.020
000193072 85642 $$uhttps://www.rvvi.cz/riv?s=rozsirene-vyhledavani&ss=detail&n=0&h=RIV%2F00025615%3A_____%2F15%3A%230002208%21RIV16-GA0-00025615
000193072 943__ $$adb: web of science
000193072 943__ $$adb: web of science, science direct
000193072 980__ $$aclanky_vugtk
000193072 985__ $$avaclavovic
000193072 985__ $$aanotace
000193072 985__ $$adousa