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Table 3 The estimable formulation for the un-differenced and un-combined PPP–RTK sever model

From: Investigating GNSS PPP–RTK with external ionospheric constraints

Parameter Formulation
\(\overline{B}_{{r \ne p,{\text{DCB}}}}^{{}}\) \(B_{{r,{\text{DCB}}}} - B_{{p,{\text{DCB}}}}\)
\(\overline{b}_{r \ne p,i > 2}^{{}}\) \((b_{r,i} - B_{{r,{\text{IF}}}} + \lambda_{i} N_{r,i}^{q} ) - (b_{p,i} - B_{{p,{\text{IF}}}} + \lambda_{i} N_{p,i}^{q} )\)
\(\overline{I}_{r,i}^{s}\) \(I_{r}^{s} + B_{{r,{\text{GF}}}} - B_{{{\text{GF}}}}^{S}\)