Open Access
Table 3
Maximum value of ionospheric frequency shift of different frequencies.
| Method | Mission | Frequency (GHz) | Maximum values of ionospheric frequency shift | ||
|---|---|---|---|---|---|
| 1st order term | 2nd order term | 3rd order term | |||
| One-way frequency transfer | ACES | 2.248 | 2.189 × 10−11 | 7.272 × 10−15 | 2.396 × 10−17 |
| 13.475 | 6.093 × 10−13 | 3.376 × 10−17 | 1.856 × 10−20 | ||
| 14.703 | 5.118 × 10−13 | 2.599 × 10−17 | 1.309 × 10−20 | ||
| CSS | 20.8 | 2.557 × 10−13 | 9.180 × 10−18 | 3.268 × 10−21 | |
| 26.8 | 1.540 × 10−13 | 4.292 × 10−18 | 1.187 × 10−21 | ||
| 30.4 | 1.197 × 10−13 | 2.940 × 10−18 | 7.163 × 10−22 | ||
| Dual-frequency combination | CSS | 30.4 | – | – | – |
| Tri-frequency | ACES | f2 = 14.703 | – | 9.280 × 10−17 | 1.037 × 10−19 |
| combination | CSS | f2 = 20.8 | – | 2.231 × 10−19 | 1. 745 × 10−22 |
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.