24 citations · 36 across the 8 of their papers we have counts for
9 papers
Total electron content PCA-NN model for middle latitudes
Anna Morozova, Teresa Barata, Tatiana Barlyaeva +1
A regression-based model was previously developed to forecast the total electron content (TEC) at middle latitudes. We present a more sophisticated model using neural networks (NN)…
Scrutinizing the relationship between plage areas and sunspot areas and numbers
Theodosios Chatzistergos, Ilaria Ermolli, Natalie A. Krivova +3
Studies and reconstructions of past solar activity require data on sunspots as well as faculae/plage and network. Such data are also important for understanding the magnetic activi…
PCA-MRM model to forecast TEC at middle latitudes
Anna L. Morozova, Teresa Barata, Tatiana Barlyaeva
The total electron content (TEC) over the Iberian Peninsula was modelled using PCA-MRM models based on decomposition of the observed TEC series using the principal component analys…
Testing the accuracy of Coimbra Astronomical Observatory solar filament historical series (1929-1941)
Ana Lourenço, Ricardo Gafeira, Vitor Bonifacio +3
The present work aims to validate the positions of solar filaments published in the Annals of Coimbra University Astronomical Observatory, currently the Geophysical and Astronomica…
Comparison of automatic methods to detect sunspots in the Coimbra Observatory spectroheliograms
S. Carvalho, S. Gomes, T. Barata +2
The Astronomical Observatory of the University of Coimbra has a huge collection of solar images, acquired daily since 1926. From the beginning, only spectroheliograms in the CaiiK…
Datasets of ionospheric parameters provided by SCINDA GNSS receiver from Lisbon airport area
Tatiana Barlyaeva, Teresa Barata, Anna Morozova
Here we present datasets provided by a SCINDA GNSS receiver installed in the Lisbon airport area from November of 2014 to July of 2019. The installed equipment is a NovAtel EURO4 w…
Variations of TEC over Iberian Peninsula in 2015 due to geomagnetic storms and solar flares
Anna L. Morozova, Tatiana V. Barlyaeva, Teresa Barata
The total ionospheric content (TEC) over the Iberian Peninsula was studied using data from two locations obtained both by GNSS receivers and an ionosonde. The principal component a…
"SCINDA-Iono" toolbox for MATLAB: analysis of ionosphere scintillations
Tatiana Barlyaeva, Teresa Barata, Anna Morozova
Here we present a "SCINDA-Iono" toolbox for the MATLAB. This is a software to analyze ionosphere scintillation indices provided by a SCINDA GNSS receiver. The toolbox is developed…
Software tool for automatic detection of solar plages in the Coimbra Observatory spectroheliograms
T. Barata, S. Carvalho, I. Dorotovic +4
Full-disk spectroheliograms have been taken in Coimbra on a daily basis since 1926 in the Ca II K-line (K1 and K3). Later, in 1989, with the upgrade of the equipment it was possibl…