Galileo Positioning Research Articles

Research into the Integrity of Galileo Positioning at Dęblin Aerodrome

Abstract The paper presents the results of the integrity of Galileo satellite positioning for the area of the military aerodrome in Dęblin. The integrity parameters of the Galileo satellite positioning have been determined for en-route navigation and the precision approach. To study the integrity parameter, Galileo satellite measurements from the GNSS reference station located in the area of the Aviation Department of the Polish Air Force University, located near EPDE military aerodrome in Dęblin, were used. In particular, in the research, to determine the integrity parameter, the mean errors of the determined coordinates of GNSS reference station in the BLh ellipsoid frame were used. The research test was carried out on 11 January,2019. The authors of the work studied the parameter of the integrity of Galileo positioning used HPL and VPL protection levels.

A frequency-independent dual-band printed quadrifilar helix antenna using nonuniform, unequal-length, asymmetrical coupled lines

A novel frequency-independent dual-band quadrifilar helix antenna (QHA) is proposed in this article. It can be applied for receiving signals of global positioning system, Galileo positioning system, and Beidou-2. To achieve dual-band/wide-band operation, a planar dual-frequency feeding network is explored to excite the proposed QHA. The measured results show that the 10-dB impedance bandwidth is almost 49.2%, the half-power beamwidths in the XOZ and YOZ planes are greater than 176° and 202° at 1.22 GHz, respectively, 130° and 120° at 1.57 GHz. In addition, the proposed QHA can provide stable, symmetrical, directional radiation patterns at two different bands and has low-cost feature. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1728–1733, 2016

A Study of Hybrid Modernized GPS and Galileo Positioning in Japan

The modernization of the GPS and the advent of the European Galileo will enhance the capability of quickly and correctly resolving the integer cycle carrier phase ambiguities in precise differential positioning. In this paper the performances of hybrid modernized GPS and Galileo positioning are analyzed for different scenarios by using the LAMBDA method in Japan. The scenarios include modernized GPS system, future Galileo system and combined GPS and Galileo system over different baselines. The results show that extending a present dual frequency GPS system to hybrid modernized GPS and Galileo system in future will significantly improve the capability of Real-Time Kinematic (RTK) positioning. On the short baseline very high ambiguity success rate can be easily obtained, even with a single epoch of data. On the medium baseline the ambiguity success rate could increase by the increased number of satellites and the improved satellite geometry. On the long baseline, for which differential atmospheric delays have to be dealt with, reliable instantaneous ambiguity resolution is feasible only if a stringent condition is met on either the code measurement accuracy or on the accuracy of atmospheric correction information.