Towards More Reliable Estimation of GPS Positioning Accuracy

Krynski, Jan; Zanimonskiy, Y. M.

doi:10.1007/3-540-27432-4_9

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…Separation between reality and artefacts in precise GPS solutions was described in Krynski et al (2002a). The strategy of GPS solutions quality analysis based on the concept of overlapping sessions with optimum length and temporal resolution was presented in Krynski and Zanimonskiy (2005). The results of the research confirmed existence of short-term oscillations in the residual variations in the geodetic coordinates and the length of vectors between the stations of terrestrial satellite networks.…”

Section: Introductionmentioning

confidence: 88%

Residual K1 and K2 Oscillations in Precise GPS Solutions: Case Study

Bogusz

Figurski

2011

Artificial Satellites

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The continuous GPS observations from Polish Ground-Based Augmentation System (ASG-EUPOS) with two different strategies were analysed. Within the first one the adopted 3-hour observation window was shifted every hour to obtain hourly geocentric coordinates for investigation of the short-period oscillations. The second was the daily solution using EPN (EUREF Permanent Network) standards and recommended models. The Eterna 3.4 software was used for determination of the variations in the tidal frequencies. The almost three-year course of data allow for investigation even close tidal frequencies, especially in PSK1 and S2K2 groups. The variations of the Up component in K1 and K2 waves were found to be significant. It turned out that K1 frequency involves the greatest amount of energy reaching even 11 mm for the Up component. Spurious oscillation up to 4 mm and the period of about 1 year in GPS height time series at the selected ASG-EUPOS sites were obtained. Long-period GPS satellite orbit modelling errors could be directly responsible for small periodic biases in station position determinations as well as the repeating geometry of the satellite constellation with respect to the tracking stations. But it is very difficult to distinguish whether it comes from artefacts (transition of K1 ad K2 in long periods) or real effects (local hydrology). Comparison with the geophysical fluid loadings needs further investigations.

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Section: Introductionmentioning

confidence: 88%

Residual K1 and K2 Oscillations in Precise GPS Solutions: Case Study

Bogusz

Figurski

2011

Artificial Satellites

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“…Height variations are obtained from network solutions with centimetre accuracy (Bruyninx et al, 2011, http://www. epncb.oma.be/) but from the solutions of short vectors referred to the reference station -with accuracy at the level of single millimetres (Krynski and Zanimonskiy, 2005;Godah et al, 2012).…”

Section: Precise Determination Of Height Changes From Gnss Datamentioning

confidence: 99%

Estimation of height changes of GNSS stations from the solutions of short vectors and PSI measurements

Krynski

Zak

Ziółkowski

et al. 2017

Geodesy and Cartography

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Time series of weekly and daily solutions for coordinates of permanent GNSS stations may indicate local deformations in Earth's crust or local seasonal changes in the atmosphere and hydrosphere. The errors of the determined changes are relatively large, frequently at the level of the signal. Satellite radar interferometry and especially Persistent Scatterer Interferometry (PSI) is a method of a very high accuracy. Its weakness is a relative nature of measurements as well as accumulation of errors which may occur in the case of PSI processing of large areas. It is thus benefi cial to confront the results of PSI measurements with those from other techniques, such as GNSS and precise levelling. PSI and GNSS results were jointly processed recreating the history of surface deformation of the area of Warsaw metropolitan with the use of radar images from Envisat and CosmoSkyMed satellites. GNSS data from Borowa Gora and Jozefoslaw observatories as well as from WAT1 and CBKA permanent GNSS stations were used to validate the obtained results. Observations from 2000-2015 were processed with the Bernese v.5.0 software. Relative height changes between the GNSS stations were determined from GNSS data and relative height changes between the persistent scatterers located on the objects with GNSS stations were determined from the interferometric results. The consistency of results of the two methods was 3 to 4 times better than the theoretical accuracy of each. The joint use of both methods allows to extract a very small height change below the level of measurement error.

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GPS-derived height changes in diurnal and sub-diurnal timescales

Bogusz

Figurski

2011

Acta Geophys.

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Towards More Reliable Estimation of GPS Positioning Accuracy

Cited by 3 publications

References 2 publications

Residual K1 and K2 Oscillations in Precise GPS Solutions: Case Study

Residual K1 and K2 Oscillations in Precise GPS Solutions: Case Study

Estimation of height changes of GNSS stations from the solutions of short vectors and PSI measurements

GPS-derived height changes in diurnal and sub-diurnal timescales

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