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| Content Provider | Springer Nature Link |
|---|---|
| Author | More, B. Radicella, S. Lacy, M. C. Herraiz, M. Rodriguez Caderot, G. |
| Copyright Year | 2010 |
| Abstract | In precise point positioning (PPP), the ionospheric delay is corrected in a first-order approximation from GPS dual-frequency observations, which should eliminate almost completely the ionosphere as a source of error. However, sudden plasma density variations can adversely affect the GPS signal, degrading accuracy and reliability of positioning techniques. The occurrence of plasma density irregularities is frequent at equatorial latitudes and is reflected in large total electron content (TEC) variations. We study the relation between large changes in the rate of TEC (ROT) and positioning errors in single-epoch PPP. At equatorial latitudes and during post-sunset hours, the estimated altitudes contain errors of several meters for a single-epoch position determination, and latitude and longitude estimates are also degraded. These results have been corroborated by the online CSRS-PPP (NRCan) program. Moreover, abrupt changes in the satellite geometry have been discarded as possible cause of such errors, suggesting an apparent relation between the occurrence of large ROT and degraded position estimates. |
| Starting Page | 381 |
| Ending Page | 390 |
| Page Count | 10 |
| File Format | |
| ISSN | 10805370 |
| Journal | GPS Solutions |
| Volume Number | 15 |
| Issue Number | 4 |
| e-ISSN | 15211886 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2010-12-24 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Ionospheric disturbances Precise point positioning Equatorial latitudes Geophysics/Geodesy Extraterrestrial Physics, Space Sciences Electrical Engineering Automotive Engineering |
| Content Type | Text |
| Resource Type | Article |
| Subject | Earth and Planetary Sciences |
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