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| Titel |
Test of GPS for permanent ionospheric TEC monitoring at high latitudes |
| VerfasserIn |
N. Zarraoa, E. Sardón |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 14, no. 1 ; Nr. 14, no. 1, S.11-19 |
| Datensatznummer |
250012132
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| Publikation (Nr.) |
 copernicus.org/angeo-14-11-1996.pdf |
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| Zusammenfassung |
| The Global Positioning System (GPS)
observables are affected by the ionosphere. The dispersive nature of this effect
and the use of two frequencies in the GPS observations make possible to measure
the ionospheric total electron content (TEC) from dual frequency GPS data. In
this work we test the concept of permanent monitoring of TEC using a network of
GPS receivers at high latitudes. We have used GPS data from five permanent
receivers in Scandinavia, from 1-30 January 1994, with geographic latitudes
ranging from 57.4°N to 78.9°N. The results show the
capability of the method to monitor the evolution of TEC as a function of time
and geographical location. We have detected night-time enhancements almost every
night for some of the stations, and we have also been able to produce maps of
the instantaneous TEC as a function of both latitude and longitude around the
GPS network. We also present some of the current limitations in the use of GPS
for estimating TEC at high latitudes such as the difficulties in solving for
cycle-slips, and the necessity of reliable values for the receiver and satellite
differential instrumental biases. |
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