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Title of Journal: J Geod

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Abbravation: Journal of Geodesy

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Springer-Verlag

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DOI

10.1002/bs.3830010306

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1432-1394

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Statistical modeling for the mitigation of GPS mul

Authors: Joz Wu ChiHsiu Hsieh
Publish Date: 2009/11/28
Volume: 84, Issue: 4, Pages: 223-232
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Abstract

Based on a leastsquares model for doubledifference GPS pseudoranges and carrierphases measurement residuals expressed in time series during an observation session are positively correlated between one sidereal day and the preceding days As a result of the satellite’s period the phenomenon which takes place at a user receiving site is attributed to multipath interference Examples from a weekly measurement dataset of control baselines are shown where the known endpoint coordinates also serve as a benchmark for assessing positioning accuracy The system of error equations for mixedmodel adjustment is divided into two subsystems One set of the error equations is related to the real range measurements while the other involves the pseudoobservation with an empirical sample variance According to the existing correlation between daytoday residual estimates a multipathmitigating algorithm is proven to improve the accuracy of the GPS height determination by at least 40 It is also found that the algorithm depends on a variancecomponent estimator that adaptively scales an error covariance matrix for both the real range and empirical delay measurements

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  2. New versions of the BDS/GNSS zenith tropospheric delay model IGGtrop
  3. Alternative validation method of satellite gradiometric data by integral transform of satellite altimetry data
  4. Alternative validation method of satellite gradiometric data by integral transform of satellite altimetry data
  5. Earth’s gravity field modelling based on satellite accelerations derived from onboard GPS phase measurements
  6. Separation of global time-variable gravity signals into maximally independent components
  7. The effect on the geoid of lateral topographic density variations
  8. Atmospheric and oceanic forcing of the rapid polar motion
  9. Methodology and use of tensor invariants for satellite gravity gradiometry
  10. Precise orbit determination for the FORMOSAT-3/COSMIC satellite mission using GPS
  11. Local Multiscale Modelling of Geoid Undulations from Deflections of the Vertical
  12. An absolute calibration site for radar altimeters in the continental domain: Lake Issykkul in Central Asia
  13. Thermosteric Effects on Interannual and Long-term Global Mean Sea Level Changes
  14. Application of SWACI products as ionospheric correction for single-point positioning: a comparative study
  15. On the double-peak spectrum of the Chandler wobble
  16. Basic equations for constructing geopotential models from the gravitational potential derivatives of the first and second orders in the terrestrial reference frame
  17. Bias in GRACE estimates of ice mass change due to accompanying sea-level change
  18. A new isostatic model of the lithosphere and gravity field
  19. Convex optimization under inequality constraints in rank-deficient systems
  20. On the deformation analysis of point fields
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