# Table 2 The estimable parameters of un-differenced and un-combined PPP–RTK and corresponding formulations

Parameter

Formulation

$$\overline{{{\text{d}}t}}^{s}$$

$${\text{d}}t^{s} - {\text{d}}t_{p} + [B_{{{\text{IF}}}}^{S} - B_{{p,{\text{IF}}}} - g_{r}^{s} \cdot T_{p}^{s} ]/c$$

$$\overline{B}_{i > 2}^{s}$$

$$B_{i}^{S} - B_{{{\text{IF}}}}^{S} - \mu_{i} B_{{{\text{GF}}}}^{S} - B_{p,i} - B_{{p,{\text{IF}}}} + \mu_{i} B_{{p,{\text{GF}}}}$$

$$\overline{b}_{i}^{s}$$

$$b_{i}^{S} - B_{{{\text{IF}}}}^{S} + \mu_{i} B_{{{\text{GF}}}}^{S} - b_{p,i} - B_{{p,{\text{IF}}}} + \mu_{i} B_{{p,{\text{GF}}}} - \lambda_{i} N_{p,i}^{S}$$

$$N_{r \ne p,i}^{s \ne q}$$

$$(N_{r,i}^{S} - N_{p,i}^{S} ) - (N_{r,i}^{q} - N_{p,i}^{q} )$$

$$\overline{T}_{r \ne p}^{s}$$

$$T_{r}^{s} - T_{p}^{s}$$

$$\overline{{{\text{d}}t}}_{r \ne p}$$

$${\text{d}}t^{s} - {\text{d}}t_{p} + [B_{{{\text{IF}}}}^{S} - B_{{p,{\text{IF}}}} ]/c$$

$$\overline{B}_{r \ne p,i > 2}^{{}}$$

$$(B_{r,i} - B_{{r,{\text{IF}}}} - \mu_{i} B_{{r,{\text{GF}}}} ) - (B_{p,i} - B_{{p,{\text{IF}}}} - \mu_{i} B_{{p,{\text{GF}}}} )$$

$$\overline{b}_{r \ne p,i > 2}^{{}}$$

$$(b_{r,i} - B_{{r,I{\text{F}}}} + \mu_{i} B_{{r,{\text{GF}}}} + \lambda_{i} N_{r,i}^{q} ) - (b_{p,i} - B_{{p,{\text{IF}}}} + \mu_{i} B_{{p,{\text{GF}}}} + \lambda_{i} N_{p,i}^{q} )$$

$$\overline{I}_{r,i}^{s}$$

$$I_{r}^{s} + B_{{r,{\text{GF}}}} - B_{{{\text{GF}}}}^{S}$$