Analysis of Parameter Correlations of the ECOM Solar Radiation Pressure Model for GPS Orbit

Table 3

Summary of the orbit integration strategy used in this study.

Option	Model
Geopotential	EGM2008 (tide-free) [20]
Inertial frame	J2000.0
Third-body	Moon, Sun, Venus, Jupiter, Mars
Solid Earth tide	IERS 2010
Ephemeris	JPL DE405
Ocean tide	CSR 3.0
Solar radiation pressure	ECOM
Transformation	IAU1976 precession
	IAU2000 nutation
Earth shadow	Conical model (scaled by eclipsing factor by the Sun’s visible area)
Integration step	Variable (output: 15 min)
Integration method	Variable order predictor-corrector (PECE)
Pole tides	Applied
Earth albedo	Box-wing model [12]
Satellite attitude	Nominal attitude
Relativistic effects	Applied