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Table 3 Network products based on the code-plus-phase and phase-only ionosphere-weighted models

From: PPP–RTK functional models formulated with undifferenced and uncombined GNSS observations

Parameter Estimable form
Code-plus-phase Phase-only
Tropospheric delay \(\tilde{\tau }_{r} = \tau_{r} - \tau_{1} \,\) \(\tilde{\tau }_{r} = \tau_{r} - \tau_{1} \,\)
Ionospheric delay \(\tilde{l}_{r}^{s} = l_{r}^{s} - d_{{,{\rm GF}}}^{s} + d_{{1,{\rm GF}}}\) \(\tilde{\hat{l}}_{r}^{s} = \tilde{l}_{r}^{s} - \tilde{\tilde{\delta }}_{{1,{\rm GF}}} + \tilde{\delta }_{{,{\rm GF}}}^{s}\)
Satellite clock \({\text{d}}\tilde{\tilde{t}}^{s} = {\text{d}}\overline{t}^{s} - {\text{d}}\overline{t}_{1} - m_{1}^{s} \tilde{\tau }_{1}\) \({\text{d}}\tilde{\hat{t}}^{s} = {\text{d}}\tilde{\tilde{t}}^{s} + \tilde{\delta }_{{,{\rm IF}}}^{s}\)
Satellite code bias \(\tilde{d}_{,j}^{s} { = }\overline{d}_{,j}^{s} { - }\overline{d}_{{{1},j}} \, \left( {j > 2} \right)\) None
Satellite phase bias \(\tilde{\delta }_{,j}^{s} = \overline{\delta }_{,j}^{s} - \overline{\delta }_{1,j} - \lambda_{j} z_{1,j}^{s}\) \(\hat{\delta }_{,j}^{s} = \tilde{\delta }_{,j}^{s} - \tilde{\delta }_{{,{\rm IF}}}^{s} - \mu_{j} \tilde{\delta }_{{,{\rm GF}}}^{s} \, \left( {j > 2} \right)\)