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| Content Provider | Springer Nature Link |
|---|---|
| Author | Fleury, Rolland Clemente, Mercedes Carvalho, Françoise Lassudrie Duchesne, Patrick |
| Copyright Year | 2009 |
| Abstract | In dual frequency Global Positioning System receivers, the ionospheric propagation delays are commonly estimated and corrected using the “ionosphere free” combinations of pseudo-range observables. With this method, the ionospheric delay is estimated at the first-order proportional to the inverse of the frequency square. However, higher-order terms exist that may be taken into account when precise corrections are required. The second-order term results from the influence of the geomagnetic field on the ionospheric propagation of the signals. The third-order term includes the refractive effects due to the bending of the ray. Contributions of the second- and third-order terms typically amount to values in the centimetre and millimetre ranges, respectively. In a near future, triple-frequency Global Navigation Satellite Systems transmitting high-resolution codes will become available. These systems are expected to provide a noticeable improvement in accuracy. This paper focuses on the Galileo signals as Galileo In-Orbit Validation Element (GIOVE) signals are now available for acquisition. A solution relying on the triple-frequency characteristics of a signal-in-space is investigated with results based on first measurements of GIOVE-A signals. Eventually, a method is described that relies on precise dual-frequency phase measurements to evaluate the second-order ionospheric contribution for Galileo data. |
| Starting Page | 615 |
| Ending Page | 623 |
| Page Count | 9 |
| File Format | |
| ISSN | 00034347 |
| Journal | Annales Des Télécommunications |
| Volume Number | 64 |
| Issue Number | 9-10 |
| e-ISSN | 19589395 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2009-05-16 |
| Publisher Place | Paris |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | GNSS High-order ionospheric correction GIOVE-A R & D/Technology Policy Signal, Image and Speech Processing Information Systems and Communication Service Communications Engineering, Networks Information and Communication, Circuits Computer Communication Networks |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
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