Table 1 List of estimated parameters
Parameter | SLR@LAGEOS | SLR@GNSS |
|---|---|---|
Common parameters | ||
Station coordinates | X, Y, Z for each station per 7 days with NNR/NNT constraints on core stations | |
Pole coordinates | X pole, Y pole; eight parameters per 7 days using piece-wise linear parameterization | |
UT1–UTC | Eight parameters per 7 days; fourth parameter fixed to IERS-14-C04 | |
Geocenter coordinates | X, Y, Z per 7 days | |
Separate parameters | ||
LAGEOS orbits | 6 Keplerian + 5 empirical: | – |
\(S_0, S_{S1}, S_{C1}, W_{S1}, W_{C1}\) per 7 days | ||
GNSS orbits | – | Fixed or estimated (see Table 2) |
6 Keplerian + 7 ECOM2 | ||
\(D_0, Y_0, B_0, D_{S2}, D_{C2},B_{S1}, B_{S1}\) per 5 days | ||
Range biases | Selected stations; one value per 7 days | Depending on parameterization from Table 2 |