Research Article

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

Table 1

SRP models and parameters for GPS final orbit estimation used in the IGS analysis centers (as of March 2018) [7, 8].

ACSRP modelSRP parameters to estimate

CODECODE RPRConstants in , , and ; once per rev. in , twice per rev. in
EMRGSPM_EPS-bias and scale in , stochastic Y-bias, and solar scale (a priori model GSPM_2013)
ESACODE RPRConstants in , , and , periodic terms in (a priori box-wing model)
GFZCODE RPRConstants in , , and , periodic terms in , 3 stochastic impulse parameters
GRGCODE RPRScale of modeled force, -bias, periodic terms in and
JPLGSPM-10-bias, constants in and (small time-varying adjustments in and tightly constrained empirical acceleration in )
MITCODE RPRConstants in , , and , periodic terms
NOAACODE RPRConstants in , , and , periodic terms in , velocity break at noon
SIOCODE RPRConstants in , , and , periodic terms in each direction