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| Titel |
Assessment of ionospheric models in GNSS single frequency positioning at low latitude regions |
| VerfasserIn |
Xurxo Otero Villamide, Bruno Nava, Sandro M. Radicella |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250098798
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| Publikation (Nr.) |
 EGU/EGU2014-14508.pdf |
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| Zusammenfassung |
| The derivation and improvement of accurate TEC models is necessary to enhance accuracy
for single frequency GNSS applications, as far as real-time precise positioning solutions at a
reduced cost for the receiver are concerned.
In the present work the CODE vertical total electron content (TEC) maps, the standard
NeQuick2 and NeQuick for Galileo models have been assessed in terms of their capabilities
to evaluate the TEC values and therefore to provide the relevant ionospheric range delay
corrections for single frequency GNSS measurements.
Different positioning algorithms have been applied to demonstrate the effectiveness of
the cited ionospheric models. They are the standard positioning service, with L1
pseudorange measurements and the precise point positioning (PPP), based on both
L1 pseudorange and carrier phase measurements with accurate orbit and clock
information.
Particular attention has been devoted to the position solutions in low latitude regions
where, due to the presence of the Equatorial Anomaly, strong electron density and TEC
gradients exist and the ionospheric models are less effective in providing the range delay
corrections needed to achieve high accuracy levels. |
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