26 citations · 78 across the 10 of their papers we have counts for
10 papers
(433) Eros and (25143) Itokawa surface properties from reflectance spectra
David Korda, Tomáš Kohout, Kateřina Flanderová +2
Context. Upcoming space missions will provide us with surface-resolved NEA reflectance spectra. Neural networks are useful tools for analysing reflectance spectra and determining m…
Neural network for determining an asteroid mineral composition from reflectance spectra
David Korda, Antti Penttilä, Arto Klami +1
Chemical and mineral compositions of asteroids reflect the formation and history of our Solar System. This knowledge is also important for planetary defence and in-space resource u…
One-sided arc averaging geometries in time-distance local helioseismology
David Korda, Michal Švanda, Thierry Roudier
The study of solar oscillations (helioseismology) has been a very successful method of researching the Sun. Helioseismology teaches us about the structure and mean properties of th…
Photospheric downflows observed with SDO/HMI, HINODE, and an MHD simulation
T. Roudier, M. Švanda, J. M. Malherbe +3
Downflows on the solar surface are suspected to play a major role in the dynamics of the convection zone. We investigate the existence of the long-lasting downflows whose effects i…
Plasma flows and sound-speed perturbations in the average supergranule
David Korda, Michal Švanda
Supergranules create a peak in the spatial spectrum of photospheric velocity features. They have some properties of convection cells but their origin is still being debated in the…
Observational study of chromospheric heating by acoustic waves
V. Abbasvand, M. Sobotka, M. Švanda +9
Aims. To investigate the role of acoustic and magneto-acoustic waves in heating the solar chromosphere, observations in strong chromospheric lines are analyzed by comparing the dep…
Evolution of photospheric flows under an erupting filament in the quiet-Sun region
Jiří Wollmann, Michal Švanda, David Korda +1
We studied the dynamics of the solar atmosphere in the region of a large quiet-Sun filament, which erupted on 21 October 2010. The filament eruption started at its northern end and…
Exploiting solar visible-range observations by inversion techniques: from flows in the solar subsurface to a flaring atmosphere
Michal Švanda, Jan Jurčák, David Korda +1
Observations of the Sun in the visible spectral range belong to standard measurements obtained by instruments both on the ground and in the space. Nowadays, both nearly continuous…
Comparison of time-distance inversion methods applied to SDO/HMI Dopplergrams
David Korda, Michal Švanda, Junwei Zhao
We compared the results from the JSOC pipeline for horizontal flow components and the perturbations of the speed of sound at set of depths with equivalent results from an independe…
Combined helioseismic inversions for 3D vector flows and sound-speed perturbations
David Korda, Michal Švanda
Time-distance helioseismology is the method of the study of the propagation of waves through the solar interior via the travel times of those waves. The travel times of wave packet…