Article Figures & Data
Figures
- FIGURE 1
Geometric relationship between Sun-Earth-satellite triplet and orientation of SRP reference frame
- FIGURE 2
Determination of optimal process noises for SRP parameters; all process noise values are in units of m/s2.
- FIGURE 3
Distribution of the 60-station network for experiments
- FIGURE 4
Accuracy comparison for experiments with different SRP models considering the GPS constellation as a whole
- FIGURE 6
Satellite-specific accuracy comparison for experiments with different SRP models
- FIGURE 7
Daily accuracy time series for individual satellites (color dots) and constellation mean (black lines) in experiment circ
- FIGURE 5
Accuracy comparison for experiments with different SRP models considering non-eclipsing satellites as a whole
- FIGURE 8
Statistics of epoch execution time
Tables
Item Strategy Treatment Sagnac effect Equation (19.07) in Hauschild (2017) Corrected in data reduction Periodic relativistic effect Equation (19.16) in Hauschild (2017) Corrected in data reduction Shapiro effect Equation (19.14) in Hauschild (2017) Corrected in data reduction Wind-up effect Wu et al. (1993) Corrected in data reduction Satellite antenna PCO/PCV igs14_wwww.atx
Yaw-steering satellite attitude model
Corrected in data reduction Receiver antenna PCO/PCV igs14_wwww.atx Corrected in data reduction Tidal displacements Solid Earth tides
Ocean loading
Pole tides
Refer to Petit and Luzum (2010)
Corrected in data reduction Tropospheric delay (dry) Zenith path delay: global pressure temperature (GPT) model + Saastamoinen model
Dry mapping function: global mapping function (GMF) model
Corrected in data reduction Ionospheric delay (1st-order) IF linear combination Eliminated Ionospheric delay (higher-order) None Ignored Tropospheric delay (wet) Wet mapping function: GMF model Estimated in data filtering Satellite state error Dynamical model in Section 2.2 Estimated in data filtering Satellite clock error Epoch-wise parameter Estimated in data filtering Receiver clock error Epoch-wise parameter Estimated in data filtering Item Strategy Comments Geopotential EGM2008 model
Truncation up to degree and order 12
IERS Conventions 2010
IERS Conventions 2010
Tidal potentials Solid Earth tides
Pole tides
Ocean tides ignored
IERS Conventions 2010 Third-body Moon, Sun, and all other major planets JPL DE405 Relativistic correction Schwarzschild term considered only IERS Conventions 2010 Solar radiation pressure The new SRP model in Section 2.3
Reduced ECOM model
Quasi-orbit-fixed frame
Satellite-fixed frame
Satellite attitude Nominal yaw-steering model Satellite eclipse Cylindrical model for Earth/Moon shadow R⊕ = 6371 km, 
Numerical integrator Runge-Kutta fourth-order method Step size 30 s Parameter type Count Initial noise Process noise (30 s) Satellite position 3 × nsat = 96 100 m 0 m Satellite velocity 3 × nsat = 96 100 m/s 0 m/s SRP dynamical parameters 1. The new SRP model 7 × nsat = 224 100 m/s2 10−13 m/s2 2. Reduced ECOM model 5 × nsat = 160 100 m/s2 10−12 m/s2 Satellite clock offset 1 × nsat = 32 108 m 108 m Receiver clock offset 1 × nsta = 60 108 m 108 m Tropospheric zenith delay 1 × nsta = 60 100 m 10−4 m Ambiguity 10 × nsta = 600 108 m 10−3 m Total 1. The new SRP model 1168 2. Reduced ECOM model 1104 Note: nsat = 32 and nsta = 60.
Item Strategy Time span From 10-01-2019 to 12-31-2019 Satellite system GPS Number of stations 60 (Distribution in Figure 3) Observable C1C / L1C / C2W / L2W
Undifferenced
IF linear combination
Elevation mask 15° Weighting strategy Pseudorange: 5.0 m
Carrier-phase: 0.01 m
Elevation-dependent with sin2(e)
Cycle-slip detection MMW: 5 cycles
MGF: 0.3 m
Residual screen Pseudorange: 10.0 m
Carrier-phase: 0.05 m
Data sample rate 30 s Orbit update rate 30 s Orbit/Clock output 30 s in SP3-c format
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