Sibsonian and non-Sibsonian natural neighbour interpolation of the total electron content value

• Autorzy: Kotulak K. , Froń A. , Krankowski A. , Pulido G. O. , Henrandez-Pajares M.
• Języki publikacji: EN

Abstrakty

EN

In radioastronomy the interferometric measurement between radiotelescopes located relatively close to each other helps removing ionospheric effects. Unfortunately, in case of networks such as LOw Frequency ARray (LOFAR), due to long baselines (currently up to 1500 km), interferometric methods fail to provide sufficiently accurate ionosphere delay corrections. Practically it means that systems such as LOFAR need external ionosphere information, coming from Global or Regional Ionospheric Maps (GIMs or RIMs, respectively). Thanks to the technology based on Global Navigation Satellite Systems (GNSS), the scientific community is provided with ionosphere sounding virtually worldwide. In this paper we compare several interpolation methods for RIMs computation based on scattered Vertical Total Electron Content measurements located on one thin ionospheric layer (Ionospheric Pierce Points—IPPs). The results of this work show that methods that take into account the topology of the data distribution (e.g., natural neighbour interpolation) perform better than those based on geometric computation only (e.g., distance-weighted methods).

Słowa kluczowe

EN

TEC; interpolation; natural neighbour interpolation

PL

TEC; interpolacja; metoda naturalnego sąsiedztwa

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2017
• Tom: Vol. 65, no. 1
• Strony: 13--28
• Opis fizyczny: Bibliogr. 29 poz.

Twórcy

autor

Kotulak K.

• Space Radio-Diagnostics Research Centre, University of Warmia and Mazury, Olsztyn, Poland

autor

Froń A.

• Space Radio-Diagnostics Research Centre, University of Warmia and Mazury, Olsztyn, Poland

autor

Krankowski A.

• Space Radio-Diagnostics Research Centre, University of Warmia and Mazury, Olsztyn, Poland

autor

Pulido G. O.

• CRC for Spatial Information, Victoria, Australia

autor

Henrandez-Pajares M.

• Department of Applied Mathematics IV, Ionospheric Determination and Navigation Based on Satellite and Terrestrial Systems Research Team, Barcelona, Spain

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