Impact of Using GPS L2 Receiver Antenna Corrections for the Galileo E5a Frequency on Position Estimates

Araszkiewicz, Andrzej; Kiliszek, Damian

doi:10.3390/s20195536

Cited by 4 publications

(5 citation statements)

References 28 publications

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“…The positive values were always obtained for the E, whereas only the negative were for the G. A bias between the E and G was noted for all weighting functions. As shown in [69], using GPS receive antenna phase center corrections for Galileo observations causes a bias of almost −8 mm for the Up component. In our solutions, the bias depends on the function used and varies from 7 mm for Function_1 to 38 mm for Function_6.…”

Section: Overall Analysismentioning

confidence: 96%

“…There is already research on obtaining official combined solutions from all ACs, where discrepancies between different ACs are still obtained [13][14][15]67]. These differences are the consequences of using different models to determine the products, as well as the need to estimate parameters such as ISB [68] or using different receiver antenna models for Galileo observations [69,70]. Therefore, it is important to adopt appropriate reference coordinates in multi-GNSS analyzes.…”

Section: Reference Coordinatesmentioning

confidence: 99%

“…Also, the use of GPS reference coordinates produces a bias of approximately 1 cm for Galileo calculations. As shown in [69], the use of Galileo phase center corrections (PCC) models for Galileo observations causes a bias of -8 mm with respect to GPS results. The use of PCC GPS models for Galileo observations results in greater consistency of the results between Galileo and GPS solutions.…”

Section: Reference Coordinatesmentioning

confidence: 99%

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Analysis of Different Weighting Functions of Observations for GPS and Galileo Precise Point Positioning Performance

2022

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This research presents the analysis of using different weighting functions for the GPS and Galileo observations in Precise Point Positioning (PPP) performance for globally located stations for one week in 2021. Eight different weighting functions of observations dependent on the elevation angle have been selected. It was shown that the use of different weighting functions has no impact on the horizontal component but has a visible impact on the vertical component, the tropospheric delay and the convergence time. Depending on the solutions, i.e., GPS-only, Galileo-only or GPS+Galileo, various weighting functions turned out to the best. The obtained results confirm that the Galileo solution has comparable accuracy to the GPS solution. Also, with the Galileo solution, the best results were obtained for functions with a smaller dependence on the elevation angle than for GPS, since Galileo observations at lower elevation angles have better performance than GPS observations. Finally, a new weighting approach was proposed, using two different weighting functions from the best GPS-only and Galileo-only for GPS+Galileo solution. This approach improves the results by 5% for convergence time and 30% for the troposphere delay when compared to using the same function.

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Section: Overall Analysismentioning

confidence: 96%

Section: Reference Coordinatesmentioning

confidence: 99%

Section: Reference Coordinatesmentioning

confidence: 99%

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Analysis of Different Weighting Functions of Observations for GPS and Galileo Precise Point Positioning Performance

2022

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“…The propagation characteristics of electromagnetic waves in plasma sheath are closely related to the frequency of electromagnetic waves. Araszkiewicz and Kiliszek discussed some of the navigation system operating frequencies in [12], which illustrated that most of the more mature frequencies used by global navigation systems were concentrated at the L-band. Table 1 lists some bands of several major navigation systems.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the influence of sheath positions, flight parameters and incident wave parameters on the wave propagation in plasma sheath

Zhang¹,

Han²,

Dong³

et al. 2022

Plasma Sci. Technol.

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The plasma sheath covering hypersonic vehicles has a significant effect on the propagation of electromagnetic waves. Based on the calculation of the flow field of a conical cylindrical, this work studies the propagation of electromagnetic waves in plasma sheath at L-band and Ku-band, and discusses the propagation characteristics in the head, side and tail of the sheath. The dielectric properties of plasma sheath are related to flight speed and altitude. A flight condition corresponds to a unique distribution of dielectric properties. For the conical cylindrical, the results show that flight speed is generally negatively correlated with the transmissivity of the plasma sheath. The reflection characteristics of electromagnetic waves at the L-band and Ku-band when obliquely incident to the plasma sheath show a downward trend. When the frequency is increased to Ku-band, the propagation characteristics of electromagnetic waves in the plasma sheath are related to the position of the sheath.

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“…The GNSS antenna PCV is still important issue in many various applications [ 4 , 5 , 6 , 7 , 8 ]. Accurate PCCs are a key element, especially in field of geodesy, where GNSS measurements are used to establish reference frames [ 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Preliminary Results of an Astri/UWM EGNSS Receiver Antenna Calibration Facility

Dawidowicz

Rapiński

Śmieja

et al. 2021

Sensors

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In 2019, the University of Warmia and Mazury in Olsztyn, in cooperation with Astri Polska, started a European Space Agency (ESA) project. The purpose of the project is the development and implementation of a field calibration procedure for a multi-frequency and multi-system global navigation satellite system (GNSS). The methodology and algorithms proposed in the project are inspired by the “Hannover” concept of absolute field receiver antenna calibration; however, some innovations are introduced. In our approach, the antenna rotation point is close to the nominal mean phase center (MPC) of the antenna, although it does not coincide with it. Additionally, a National Marine Electronics Association local time zone (NMEA ZDA) message is used to synchronize the robot with the GNSS time. We also propose some modifications in robot arm movement scenarios. Our first test results demonstrate consistent performance for the calibration strategy and calibration procedure. For the global positioning system (GPS) L1 frequency, the calibration results show good agreement with the IGS-type mean values. For high satellite elevations (20°–90°), the differences do not exceed 1.5 mm. For low elevation angles (0°–20°), the consistency of the results is worse and the differences exceed a 3 mm level in some cases.

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Impact of Using GPS L2 Receiver Antenna Corrections for the Galileo E5a Frequency on Position Estimates

Cited by 4 publications

References 28 publications

Analysis of Different Weighting Functions of Observations for GPS and Galileo Precise Point Positioning Performance

Analysis of Different Weighting Functions of Observations for GPS and Galileo Precise Point Positioning Performance

Analysis of the influence of sheath positions, flight parameters and incident wave parameters on the wave propagation in plasma sheath

Preliminary Results of an Astri/UWM EGNSS Receiver Antenna Calibration Facility

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