Precise GPS Positioning Improvements by Reducing Antenna and Site Dependent Effects

Seeber, Günter; Menge, Falko; Völksen, Christof; Wübbena, Gerhard; Schmitz, Martin

doi:10.1007/978-3-662-03714-0_38

Cited by 33 publications

(24 citation statements)

References 1 publication

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“…The semimajor axis and the correction to the mean motion given in the broadcast ephemeris are used to determine the repeat time of the satellite. This repeat-time determination requires very little computing load and is quick, and produces similar repeat time as the other methods described above (Axelrad et al 2005;Seeber et al 1998). Moreover, this repeat-time determination method has the least latency when comparing with those methods that require precise orbits and those approaches involving correlation of residual time series between days.…”

Section: Introductionmentioning

confidence: 78%

“…The fixed sidereal day of 23 h and 56 min is used to correlate the positioning errors in consecutive days. Seeber et al (1998) investigate the exact period of the sidereal repeatability for individual satellites using cross-correlation of double differences in time domain, correlation of elevation and azimuth time series, and computation from individual ephemeris. Different repeat times of 240-256 s in sidereal advancement for satellites are found in the literature, and results show that the repeat times of satellites determined by the three methods are in good agreement.…”

Section: Introductionmentioning

confidence: 99%

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Wavelet packets based denoising method for measurement domain repeat-time multipath filtering in GPS static high-precision positioning

Lau

2016

GPS Solut

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Repeatable satellite orbits can be used for multipath mitigation in GPS-based deformation monitoring and other high-precision GPS applications that involve continuous observation with static antennas. Multipath signals at a static station repeat when the GPS constellation repeats given the same site environment. Repeat-time multipath filtering techniques need noise reduction methods to remove the white noise in carrier phase measurement residuals in order to retrieve the carrier phase multipath corrections for the next day. We propose a generic and robust three-level wavelet packets based denoising method for repeat-time-based carrier phase multipath filtering in relative positioning; the method does not need tuning to work with different data sets. The proposed denoising method is tested rigorously and compared with two other denoising methods. Three rooftop data sets collected at the University of Nottingham Ningbo China and two data sets collected at three Southern California Integrated GPS Network high-rate stations are used in the performance assessment. Test results of the wavelet packets denoising method are compared with the results of the resistor-capacitor (RC) low-pass filter and the singlelevel discrete wavelet transform (DWT) denoising method. Multipath mitigation efficiency in carrier phase measurement domain is shown by spectrum analysis of two selected satellites in two data sets. The positioning performance of the repeat-time-based multipath filtering techniques is assessed. The results show that the performance of the three noise reduction techniques is about 1-46 % improvement on positioning accuracy when compared with no multipath filtering. The statistical results show that the wavelet packets based denoising method is always better than the RC filter by 2-4 %, and better than the DWT method by 6-15 %. These results suggest that the proposed wavelet packets based denoising method is better than both the DWT method and the relatively simple RC low-pass filter for noise reduction in multipath filtering. However, the wavelet packets based denoising method is not significantly better than the RC filter.

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Section: Introductionmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Wavelet packets based denoising method for measurement domain repeat-time multipath filtering in GPS static high-precision positioning

Lau

2016

GPS Solut

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“…are needed for this specific antenna, an individual calibration is recommended. The drawback of the type-mean is that the results are much noisier than for individual calibrations (Seeber et al, 1997;Menge et al, 1998;Rothacher, 2001;Schmid et al, 2005;Zeimetz and Kuhlman, 2008).…”

Section: Methodsmentioning

confidence: 99%

“…1). (Seeber et al, 1997;Seeber and Böder, 2002). In this study, the authors also used the typemean calibrations distributed by the IGS.…”

Section: Analysis Of Pcc Model Dependent Periodic Signals In Glonass mentioning

confidence: 99%

Analysis of PCC model dependent periodic signals in GLONASS position time series using Lomb_Scargle periodogram

Dawidowicz¹

2016

Acta Geodynamica Et Geomaterialia

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Exactly in November 2006 (GPS week 1400), the IGS analysis centers switched from using relative to absolute corrections. At the same time, also the EUREF analysis centers made this switch. Many research groups have evaluated the influence of the usage of relative PCC with respect to absolute PCC on the EPN site coordinates. The authors demonstrated the significant influences of the conversion from relative to absolute PCC. Maximum changes in height of about 30 mm occurred at some sites. The impact of switching from the type-mean to individual calibration model was also analyzed but so far in GPS-only mode. In the paper, the authors compared station positions estimated using GLONASS-only observations when type-mean and individual calibration models were applied. The impact of switching between these models was investigated using one year of observations collected at eight selected ASG-EUPOS station. Post-processing was done using PPP technique in daily observation mode and in pseudo-kinematic mode (15 minutes session). The authors demonstrated that the position offsets in daily observation resulting from the use of individual calibrations instead of type mean igs08.atx calibrations could reach up to 0.5 cm in the up component, while in the horizontal, the offsets generally stayed below 0.1 cm. In pseudokinematic mode the authors obtained up to 1.0 cm in the up component and 0.5 cm in the horizontal components respectively. It is also demonstrated that the differences in the calibrations models propagate directly into the position domain, affecting daily and sub-daily results and giving visible variations and systematic jumps. To detect the periodicity in our results spectral analysis was used. The LombScargle spectrum calculated for the data revealed that there are strong periodic signals in pseudokinematic results and there is also some periodicity in daily results. ARTICLE INFO

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“…Sin embargo este periodo de tiempo no es exactamente un día sidéreo y tampoco es exactamente igual para toda la constelación de satélites (Seeber et al 1997). Esto se debe a que el criterio que se emplea para fijar la posición de los satélites es que se mantenga la longitud terrestre del nodo ascendente de la órbita (Chao y Schmitt, 1991), por lo que los efectos de la precesión de la tierra provocan que el periodo de la órbita del satélite sea aproximadamente 8 segundos más breve que un día sidéreo (Choi et al, 2004).…”

Section: Filtro Sidéreounclassified

Desarrollo e implementación de un procesado GPS subdiario para el control de deformaciones en áreas volcánicas

Ordóñez¹

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Precise GPS Positioning Improvements by Reducing Antenna and Site Dependent Effects

Cited by 33 publications

References 1 publication

Wavelet packets based denoising method for measurement domain repeat-time multipath filtering in GPS static high-precision positioning

Wavelet packets based denoising method for measurement domain repeat-time multipath filtering in GPS static high-precision positioning

Analysis of PCC model dependent periodic signals in GLONASS position time series using Lomb_Scargle periodogram

Desarrollo e implementación de un procesado GPS subdiario para el control de deformaciones en áreas volcánicas

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