Time transfer using GPS carrier phase: error propagation and results

Dach, Rolf; Beutler, Gerhard; Hugentobler, Urs; Schaer, Stefan; Schildknecht, Thomas; Springer, T.; Dudle, G.; Prost, L.

doi:10.1007/s00190-002-0296-z

Cited by 47 publications

(22 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Santerre, 1991;Dach et al, 2003;Kouba, 2005]. In combination with multipath effects and troposphere modeling errors, the amplification of observation errors through these pronounced correlations is one of the main limiting factors for accurate GNSS height determination.…”

Section: Introductionmentioning

confidence: 99%

Improved GPS‐based coseismic displacement monitoring using high‐precision oscillators

Weinbach

Schön

2015

Geophysical Research Letters

View full text Add to dashboard Cite

The determination of high‐frequency displacements using Global Navigation Satellite Systems (GNSS) observations with sampling frequencies > 1 Hz has attracted much interest in recent years, e.g., in seismology. We propose a new concept for GPS Precise Point Positioning (PPP) that takes advantage of a highly stable oscillator connected to the GPS receiver by modeling its behavior. We show that the high‐frequency noise of kinematic GPS height estimates can be reduced by a factor of up to 4 to the level of 2–3 mm and the overall standard deviation including systematic long periodic errors by a factor of up to 2 to the 1 cm level. Consequently, valuable small and currently hidden vertical displacements can be detected that are not visible with classical PPP. Using data of the 2010 Chile earthquake, we demonstrate that coseismic vertical displacements with an amplitude of only 5 mm can be recovered using PPP with the proposed clock modeling strategy.

show abstract

Section: Introductionmentioning

confidence: 99%

Improved GPS‐based coseismic displacement monitoring using high‐precision oscillators

Weinbach

Schön

2015

Geophysical Research Letters

View full text Add to dashboard Cite

show abstract

“…The resulting large number of clock parameters are strongly correlated with troposphere Zenith Path Delays (ZPD) parameters and the station height (Dach et al 2003;Rothacher and Beutler 1998). It can be expected that, if the quality of the high-performance receiver clocks could be fully exploited with an appropriate deterministic and stochastic model, the solutions of other parameters, especially the kinematic station height estimates, should become more stable and more accurate because of the strong correlation between the clock parameters and the station height.…”

Section: Introductionmentioning

confidence: 99%

Stochastic modeling of high-stability ground clocks in GPS analysis

Wang

Rothacher

2013

J Geod

View full text Add to dashboard Cite

In current global positioning system (GPS) applications, receiver clocks are typically estimated epoch-wise in the data analyses even for clocks with high performance like Hydrogen-masers (H-maser). Applying an appropriate clock model for high-stability receiver clocks should, in view of the strong correlation between the station height and the clock parameters, significantly improve the positioning results. Recent experiments have shown that modeling the deterministic behavior of high-quality receiver clocks can improve the kinematic precise point positioning considerably. In this paper, well-behaving ground clocks are studied in detail applying constraints between subsequent and near-subsequent clock parameters. The influence of different weights for these relative clock constraints on the positioning quality, especially on the height, is investigated. For excellent clocks, an improvement of up to a factor of 3 can be obtained for the repeatability of the kinematic height estimates. This may be essential to detect small but sudden changes in the vertical component (e.g., caused by earthquakes). Troposphere zenith path delays (ZPD) are also heavily correlated with the receiver clock estimates and station heights. All these parameters are usually estimated simultaneously. We show that the use of relative clock constraints allows for a higher time resolution of the ZPD estimates (smaller than 2 h) without compromising the quality of the kinematic height estimates.

show abstract

“…The receiver delay should, however, be seriously considered for time-transfer (Ray and Senior 2002) and determination of ionospheric delay corrections for wide area differential GPS positioning. This is due to the facts that (1) the partial (or full) influence of the receiver hardware delay will be absorbed by the estimated receiver and satellite clock parameters (Dach et al 2003), which is one of the main error sources of time-transfer, and (2) to obtain accurate absolute ionospheric corrections from GPS data for wide area differential GPS positioning, the receiver delay values should be removed from the ionospheric measurements or estimated along with ionosphere parameters . Several studies have presented the behavior of L1/L2 interfrequency delays (or biases) using data from a network of multiple GPS reference stations such as IGS stations (Wilson and Mannucci 1993) or the Canadian Active Control System (Gao et al 1994).…”

Section: Introductionmentioning

confidence: 99%

Modelling of differential single difference receiver clock bias for precise positioning

Liu

Tiberius

Jong³

2004

GPS Solutions

View full text Add to dashboard Cite

A receiver hardware delay should be seriously considered for time-transfer and determination of ionospheric delay corrections for wide area differential GPS positioning. A receiver hardware delay does not generally effect the common geo-position application, as suitable differences of observations are used, or equivalently, clock error parameters are introduced, epoch-wise, that also absorb the delays. This paper investigates the behavior of inter-frequency (or observationtype) receiver hardware delays by using a single difference (SD) model, which estimates the receiver delay along with the receiver clock error (and SD ambiguities of a reference satellite with carrier phase observations) for zero and short baselines. The purpose of this paper is to model the betweenobservation-type delays for the purpose of precise positioning, under practical circumstances. The focus is on data series of differential SD receiver clock biases, since they reflect the behavior of receiver hardware delays with time. A simple linear regression of the data series is employed to study the behavior, and test statistics are employed to assess both the significance of the parameters and the observations' fit for the linear regression. The statistical analysis results indicate that almost all inter-observation type receiver delays can be modeled as the sum of a constant (offset) and a constant rate of change (slope). The analysis shows that the differential receiver delay is generally at the mm-to cm-level on phase, while at the dm-level on code for the equipment used in the experiments.

show abstract

Time transfer using GPS carrier phase: error propagation and results

Cited by 47 publications

References 0 publications

Improved GPS‐based coseismic displacement monitoring using high‐precision oscillators

Improved GPS‐based coseismic displacement monitoring using high‐precision oscillators

Stochastic modeling of high-stability ground clocks in GPS analysis

Modelling of differential single difference receiver clock bias for precise positioning

Contact Info

Product

Resources

About