Application of ionospheric tomography to real-time GPS carrier-phase ambiguities Resolution, at scales of 400-1000 km and with high geomagnetic activity
The influence of the ionosphere can be one of the main obstacles to GPS carrier phase ambiguity resolution in real‐time, particularly over long baselines. This is important to all users of GPS requiring sub‐decimeter positioning, perhaps in real time, especially with high geomagnetic activity or clo...
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| Veröffentlicht in: | Geophysical research letters 2000-07, Vol.27 (13), p.2009-2012 |
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| container_issue | 13 |
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| container_title | Geophysical research letters |
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| creator | Hernández-Pajares, M. Juan, J. M. Sanz, J. Colombo, O. L. |
| description | The influence of the ionosphere can be one of the main obstacles to GPS carrier phase ambiguity resolution in real‐time, particularly over long baselines. This is important to all users of GPS requiring sub‐decimeter positioning, perhaps in real time, especially with high geomagnetic activity or close to the Solar Maximum. Therefore, it is desirable to have a precise estimation of the ionospheric delay in real‐time, to correct the data. In this paper we asses a real‐time tomographic model of the ionosphere created using dual‐frequency phase data simultaneously collected with the receivers of a network of stations in the USA and Canada, with separations of 400–1000 km, during a period of high geomagnetic activity (Kp=6). When the tomographic ionospheric correction is included, the resolution on‐the‐fly (OTF) of the widelane double‐differenced ambiguities at the reference stations is nearly 100% successful for satellite elevations above 20 degrees, while the resolution of the L1, L2 ambiguities at the rover is typically more than 80% successful. |
| doi_str_mv | 10.1029/1999GL011239 |
| format | Article |
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| source | Wiley Online Library Journals Frontfile Complete; Wiley Online Library Free Content; Wiley-Blackwell AGU Digital Library; EZB-FREE-00999 freely available EZB journals |
| subjects | Ambiguity Carriers Earth sciences Earth, ocean, space Exact sciences and technology Geomagnetism Geophysics: general, magnetic, electric and thermic methods and properties Internal geophysics Ionosphere Ionospherics Obstacles Real time Stations |
| title | Application of ionospheric tomography to real-time GPS carrier-phase ambiguities Resolution, at scales of 400-1000 km and with high geomagnetic activity |
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