Table 3 Estimated receiver clock, DCB, IFB, and ionospheric delay parameters from various BDS PPP models
From: PPP models and performances from single- to quad-frequency BDS observations
Model | Receiver clock (\(d\bar{t}_{r}\)) | DCB (DCB) | IFB (ifb) | Ionospheric delay (\(\tau\)) |
|---|---|---|---|---|
SF1 | \(dt_{r} + d_{r,j}\) | Null | Null | \(\tau\) |
SF2 | \(dt_{r} + d_{r,j} /2 + b_{r,j} /2\) | Null | Null | Null |
SF3 | \(dt_{r} + d_{r,j}\) | Null | Null | \(\tau\) |
DF1 | \(dt_{r} + d_{r,(1,2)}\) | Null | Null | \(\tau \text{ + }\beta_{1,2} \cdot DCB_{r,(1,2)}\) |
DF2 | \(dt_{r} + d_{r,(1,2)}\) | Null | Null | Null |
DF3 | \(dt_{r} + d_{r,j} /2 + b_{r,j} /2\) | \(DCB_{r,(1,2)}\) | Null | Null |
DF4 | \(dt_{r} + d_{r,(1,2)}\) | Null | Null | \(\tau\) |
TF1 | \(dt_{r} + d_{r,(1,2)}\) | Null | \(\beta_{ 1, 2} /\beta_{ 1,3} \cdot DCB_{r,(1,2)} - DCB_{r,(1,3)}\) | \(\tau \text{ + }\beta_{1,2} \cdot DCB_{r,(1,2)}\) |
TF2 | \(dt_{r} + d_{r,(1,2)}\) | Null | \(\beta_{ 1, 2} \cdot DCB_{r,(1,2)} - \beta_{ 1,3} \cdot DCB_{r,(1,3)}\) | Null |
TF3 | \(dt_{r} + d_{r,(1,2,3)}\) | Null | \(d_{r,(1,2)} - d_{r,(1,2,3)}\) | Null |
TF4 | \(dt_{r} + d_{r,(1,2)}\) | \(DCB_{r,(1,2)}\) | \(\beta_{ 1, 2} /\beta_{ 1,3} \cdot DCB_{r,(1,2)} - DCB_{r,(1,3)}\) | \(\tau\) |
QF1 | \(dt_{r} + d_{r,(1,2)}\) | Null | 1. \(\beta_{ 1, 2} /\beta_{ 1,3} \cdot DCB_{r,(1,2)} - DCB_{r,(1,3)}\) 2. \(\beta_{ 1, 2} /\beta_{ 1, 4} \cdot DCB_{r,(1,2)} - DCB_{r,(1, 4)}\) | \(\tau \text{ + }\beta_{1,2} \cdot DCB_{r,(1,2)}\) |
QF2 | \(dt_{r} + d_{r,(1,2)}\) | Null | \(d_{r,( 3, 4)} - d_{r,(1,2)}\) | Null |
QF3 | \(dt_{r} + d_{r,(1,2,3,4)}\) | Null | \(d_{r,(1,2)} - d_{r,(1,2,3,4)}\) | Null |
QF4 | \(dt_{r} + d_{r,(1,2)}\) | \(DCB_{r,(1,2)}\) | 1. \(\beta_{ 1, 2} /\beta_{ 1,3} \cdot DCB_{r,(1,2)} - DCB_{r,(1,3)}\) 2. \(\beta_{ 1, 2} /\beta_{ 1, 4} \cdot DCB_{r,(1,2)} - DCB_{r,(1, 4)}\) | \(\tau\) |