Table 2 The estimable parameters of un-differenced and un-combined PPP–RTK and corresponding formulations
From: Investigating GNSS PPP–RTK with external ionospheric constraints
Parameter | Formulation |
|---|---|
\(\overline{{{\text{d}}t}}^{s}\) | \({\text{d}}t^{s} - {\text{d}}t_{p} + [B_{{{\text{IF}}}}^{S} - B_{{p,{\text{IF}}}} - g_{r}^{s} \cdot T_{p}^{s} ]/c\) |
\(\overline{B}_{i > 2}^{s}\) | \(B_{i}^{S} - B_{{{\text{IF}}}}^{S} - \mu_{i} B_{{{\text{GF}}}}^{S} - B_{p,i} - B_{{p,{\text{IF}}}} + \mu_{i} B_{{p,{\text{GF}}}}\) |
\(\overline{b}_{i}^{s}\) | \(b_{i}^{S} - B_{{{\text{IF}}}}^{S} + \mu_{i} B_{{{\text{GF}}}}^{S} - b_{p,i} - B_{{p,{\text{IF}}}} + \mu_{i} B_{{p,{\text{GF}}}} - \lambda_{i} N_{p,i}^{S}\) |
\(N_{r \ne p,i}^{s \ne q}\) | \((N_{r,i}^{S} - N_{p,i}^{S} ) - (N_{r,i}^{q} - N_{p,i}^{q} )\) |
\(\overline{T}_{r \ne p}^{s}\) | \(T_{r}^{s} - T_{p}^{s}\) |
\(\overline{{{\text{d}}t}}_{r \ne p}\) | \({\text{d}}t^{s} - {\text{d}}t_{p} + [B_{{{\text{IF}}}}^{S} - B_{{p,{\text{IF}}}} ]/c\) |
\(\overline{B}_{r \ne p,i > 2}^{{}}\) | \((B_{r,i} - B_{{r,{\text{IF}}}} - \mu_{i} B_{{r,{\text{GF}}}} ) - (B_{p,i} - B_{{p,{\text{IF}}}} - \mu_{i} B_{{p,{\text{GF}}}} )\) |
\(\overline{b}_{r \ne p,i > 2}^{{}}\) | \((b_{r,i} - B_{{r,I{\text{F}}}} + \mu_{i} B_{{r,{\text{GF}}}} + \lambda_{i} N_{r,i}^{q} ) - (b_{p,i} - B_{{p,{\text{IF}}}} + \mu_{i} B_{{p,{\text{GF}}}} + \lambda_{i} N_{p,i}^{q} )\) |
\(\overline{I}_{r,i}^{s}\) | \(I_{r}^{s} + B_{{r,{\text{GF}}}} - B_{{{\text{GF}}}}^{S}\) |