46 citations · 61 across the 3 of their papers we have counts for
4 papers
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…
Neural Network Forecast of the Sunspot Butterfly Diagram
Eurico Covas, Nuno Peixinho, Joao Fernandes
Using neural networks as a prediction method, we attempt to demonstrate that forecasting of the Sun's sunspot time series can be extended to the spatial-temporal case. We employ th…
Temporal Evolution of Sunspot Areas and Estimation of Related Plasma Flows
R. Gafeira, C. C. Fonte, M. A. Pais +1
The increased amount of information provided by ongoing missions such as the Solar Dynamics Observatory (SDO) represents a great challenge for the understanding of basic questions…
Variation rate of sunspot area
R. Gafeira, C. C. Fonte, M. A. Pais +1
The emergence of the magnetic field through the photosphere has multiple manifestations and sunspots are the most prominent examples of this. One of the most relevant sunspot prope…