Search Results - "Nygrén, Tuomo"

IMF effect on ionospheric trough occurrence at equinoxes by Voiculescu, Mirela, Nygrén, Tuomo

“…Previous observations have shown that there is a relationship between the F region trough and both B z and B y components of the interplanetary magnetic field…”
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A new incoherent scatter technique in the EISCAT Svalbard Radar by Lehtinen, Markku, Markkanen, Jussi, Väänänen, Antero, Huuskonen, Asko, Damtie, Baylie, Nygrén, Tuomo, Rahkola, Jyrki

“…A special incoherent scatter technique in the European Incoherent Scatter (EISCAT) Svalbard Radar (ESR) was tested in November 1999. After the 70‐MHz IF stage…”
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Stochastic inversion in ionospheric radiotomography by Nygrén, Tuomo, Markkanen, Markku, Lehtinen, Markku, Tereshchenko, Evgeny D., Khudukon, Boris Z.

“…The stochastic inversion method in ionospheric radiotomography is reviewed with a special emphasis on regularization used in the inversion process…”
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Ionospheric structures invisible in satellite radiotomography by Saksman, Eero, Nygrén, Tuomo, Markkanen, Markku

“…In satellite ray tomography the measurements are samples of Radon transform of the ionospheric electron density. Regardless of the practical numerical method…”
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Long alternating codes: 2. Practical search method by Markkanen, Markku, Nygrén, Tuomo

“…This paper is the second one in a series explaining a new search method of long alternating codes for incoherent scatter radars. The first paper explains the…”
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Long alternating codes: 1. Search by playing dominoes by Nygrén, Tuomo, Markkanen, Markku

“…A new extremely effective method of finding strong alternating codes for incoherent scatter radars has been invented. The power of this method is described by…”
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