Tropospheric and Ionospheric Modeling Using GNSS Time Series in Volcanic Eruptions (La Palma, 2021)

Engineering Proceedings

article

Paola Barba¹  Javier Ramírez-Zelaya¹  Vanessa Jiménez²  Belén Rosado¹  Elena Jaramillo¹  Mario Moreno¹  Manuel Berrocoso¹ 

[1] Laboratorio de Astronomía, Geodesia y Cartografía, Departamento de Matemáticas, Facultad de Ciencias, Campus de Puerto Real, Universidad de Cádiz;Departamento de Física Teórica y del Cosmos, Facultad de Ciencias ,(Edificio Mecenas), Campus de Fuentenueva, Universidad de Granada

关键词: troposphere;    ionosphere;    ZTD;    TEC;    GNSS system;    volcanic eruption;    La Palma Island;   

DOI  :  10.3390/engproc2023039047

来源: mdpi

【 摘 要 】

The signal coming from the artificial satellites of the GNSS system suffers various effects that considerably decrease the precision in solving the positioning problem. To mathematically model these effects, the atmosphere is divided into two main parts, the troposphere and the ionosphere. The troposphere can only be modelled, while the ionospheric effect can be modeled or eliminated depending on the geodetic sophistication of the receivers used. In this way, information is obtained about both layers of the atmosphere. For tropospheric modeling, the parameters of total zenithal delay (ZTD) or precipitable water vapor (PVW) will be taken, and for the ionosphere the total electron content (TEC) will be taken. In this work, statistical and analytical techniques will be applied with the R software; for example, ARMA, ARIMA models, least squares methods, wavelet functions, Kalman techniques, and CATS analysis. With this, the anomalies that occurred in the values of the ZTD and TEC in the case of the 2021 eruption of the Cumbre Vieja volcano on the island of La Palma.

【 授权许可】

Unknown