Table 2 Comparisons of the dual- and five-frequency PPP models
From: Modeling and assessment of five-frequency BDS precise point positioning
Model name | Frequency name of signals | Parameters | \(\gamma_{j}\) | Noise | ||||
|---|---|---|---|---|---|---|---|---|
e1 | e2 | e3 | e4 | e5 | ||||
DF | B1I/B3I | 0 | 0 | 2.94 | − 1.94 | 0 | 0 | 3.53 |
FF1 | B1C | 1 | Â | 0 | 0 | 0 | 1 | 1 |
B2a | 0 | 1 | 0 | 0 | 0 | 1.79 | 1 | |
B1I | 0 | 0 | 1 | 0 | 0 | 1.02 | 1 | |
B3I | 0 | 0 | 0 | 1 | 0 | 1.54 | 1 | |
B2 | 0 | 0 | 0 | 0 | 1 | 1.75 | 1 | |
FF2 | B1C/B2a | 2.26 | − 1.26 | 0 | 0 | 0 | 0 | 2.59 |
B1C/B1I | 55.25 | 0 | − 54.25 | 0 | 0 | 0 | 77.48 | |
B1C/B3I | 2.84 | 0 | 0 | − 1.84 | 0 | 0 | 3.39 | |
B1C/B2 | 2.34 | 0 | 0 | 0 | − 1.34 | 0 | 2.70 | |
FF3 | B1C/B2a | 2.26 | − 1.26 | 0 | 0 | 0 | 0 | 2.59 |
B1C/B2 | 2.338 | 0 | 0 | 0 | − 1.338 | 0 | 2.694 | |
B1I/B3I | 0 | 0 | 2.944 | − 1.944 | 0 | 0 | 3.527 | |
FF4 | B1C/B2a/B2 | 2.293 | − 0.734 | 0 | 0 | − 0.559 | 0 | 2.472 |
B1I/B3I | 0 | 0 | 2.944 | − 1.944 | 0 | 0 | 3.527 | |
FF5 | B1C/B2a/B1I/B3I/B2 | 1.196 | − 0.684 | 1.153 | − 0.090 | − 0.575 | 0 | 1.888 |