Pseudo-range differential positioning

Pseudo-range differential positioning

$\begin{aligned} 测站r：P_{r}^{s} &= (\rho_r^s+I_{r}^{s}+T_r)+c(dt_r-dt^s)+ \varepsilon_P \\ 测站b：P_{b}^{s} &= (\rho_b^s+I_{b}^{s}+T_b)+c(dt_b-dt^s)+ \varepsilon_P\tag{1}\\ \end{aligned}$
inter-satellite single difference eliminating satellite clock error, ionospheric and tropospheric delay can be obtained:
$\begin{aligned} P_{rb}^{s} &= \rho_{rb}^s+cdt_{rb}+ \sqrt{2}\varepsilon_P \\\tag{2} \end{aligned}$