Wyniki wyszukiwania - BazTech

1

Performance of real-time network code DGPS services of ASG-EUPOS in north-eastern Poland

Przestrzelski P., Bakuła M.

Technical Sciences / University of Warmia and Mazury in Olsztyn

|

2014

|

nr 17(3)

191--207

EN

This paper presents the performance study results of two ASG-EUPOS system services (KODGIS and NAWGIS) carrying out real-time network code DGPS positioning. In this elaboration, basic information about the system and discussed services are presented, as well as the advantages of the code differential positioning. The accuracies of the KODGIS and NAWGIS given by the system administrator are provided and papers and presentations with local and international impact were considered. A description of the experiment and the obtained results were provided for three days of measurements taken in north-eastern Poland, near Olsztyn. The research results showed that the positioning errors achieved using the KODGIS service throughout the study exceeded values declared by the ASG-EUPOS system administrator. This service, with respect to NAWGIS, was also characterized by higher fluctuations in the determined coordinates. Moreover, the occurrence of systematic errors in the performance of both studied services was noted, whereas the weakest element of the entire ASG-EUPOS system appeared to be the data transmission to the user.

2

Study of differential code GPS/GLONASS positioning

Przestrzelski P., Bakuła M.

Annual of Navigation

|

2014

|

No. 21

117--132

EN

This paper presents the essential issues and problems associated with GNSS (Global Navigation Satellite System) code differential positioning simultaneously using observations from at least two independent satellite navigation systems. To this end, two satellite navigation systems were selected: GPS (Global Positioning System, USA) and GLONASS (GLObalnaya NAvigatsionnaya Sputnikovaya Sistema, Russia). The major limitations and methods of their elimination are described, as well as the basic advantages and benefits resulting from the application of the DGNSS (Differential GNSS) positioning method. Theoretical considerations were verified with the post-processed observations gathered during a six-hour measurement. The data from selected reference stations of the ASG-EUPOS (Active Geodetic Network — EUPOS) system located at different distances from the rover site was used. The study showed that the DGNSS positioning method achieves higher accuracy and precision, and improves the stability of coordinate determination in the time domain, compared to positioning which uses only one satellite navigation system. However, it was shown that its navigational application requires further studies, especially for long distances from the reference station.

PL

W artykule przedstawiono zasadnicze zagadnienia i problemy odnoszące się do pozycjonowania opartego na różnicowych pomiarach kodowych GNSS przy równoczesnym wykorzystywaniu sygnałów od co najmniej dwóch niezależnych systemów nawigacji satelitarnej. W tym celu wybrano amerykański GPS oraz rosyjski GLONASS. W artykule opisano najważniejsze ograniczenia oraz metody ich eliminacji, jak również podstawowe zalety i korzyści będące wynikiem stosowania DGNSS (różnicowa wersja GNSS) dla pozycjonowania. Teoretyczne rozważania zostały zweryfikowane metodą opracowania w post-processingu obserwacji zebranych podczas sześciogodzinnej sesji pomiarowej. Do obliczeń użyto danych od wybranych stacji odniesienia ASG EUPOS (aktywna sieć geodezyjna). Badania wykazały, że metoda pozycjonowania DGNSS pozwala osiągnąć wyższą dokładność i precyzję, a także poprawić stabilność wyznaczanych współrzędnych w domenie czasu w porównaniu do metod opartych na wykorzystaniu sygnałów tylko od jednego systemu satelitarnego.

3

Development and research of differential mode GNSS model for intelligent transport functioning providing

Kulik A., Degrachov K., Lytvynenko T.

Transport Problems

|

2012

|

T. 7, z. 4

71-77

EN

Description of the modeling system of differential GNSS mode for the operation ITS is considered. Differential method of navigation allows to precise determination of the coordinates and is not very complicated for technical realization. The coordinates of the consumer are calculated with high accuracy because the base station and the user are located in a short distance from each other. Determination of the origin location is on the same satellite and method of local correction is implemented.

4

Decoding of SIRF binary protocol

Oszczak B., Serżysko K.

Artificial Satellites : Journal of Planetary Geodesy

|

2011

|

Vol. 46, No. 4

127--137

EN

In this article the SiRF binary format decoding algorithm was presented and parameters contained in it and methods of their use were described. Due to the current lack of practical software which would be able to decode the SiRF format the authors’ application called SiRF Decoder was created. Algorithm used in the application allowing for fast reading and decoding of recorded binary SiRF protocol data was presented. For the analysis of decoded data the authors’ program was used, on which the parameters contained in SiRF messages recorded by the GNSS receiver along with the possibilities of their use in the GNSS research were evaluated by the authors.