Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Markku Lehtinen"'
Publikováno v:
Molecules, Vol 20, Iss 1, Pp 35-42 (2014)
The autoxidation-degradation processes of polyunsaturated fatty acids give rise to toxic products, and the relative toxicity at different stages of the process is of great interest. We report here that when methyl α-linolenate is exposed to sunlight
Externí odkaz:
https://doaj.org/article/4123c35b9f394ff59f8265b141dd9ca0
Autor:
Markku Lehtinen, Pertti Pulkkinen
Publikováno v:
Metsätieteen aikakauskirja, Vol 2017 (2017)
Externí odkaz:
https://doaj.org/article/3e877a8320e14b3b8de36e042a4090bd
Autor:
Kirsti Kauristie, Mikko Orispää, Lassi Roininen, Anthea J. Coster, Juha Vierinen, Markku Lehtinen, Johannes Norberg, William C. Rideout
Publikováno v:
IEEE Transactions on Geoscience and Remote Sensing. 56:7009-7021
Source at https://doi.org/10.1109/TGRS.2018.2847026. In ionospheric tomography, the atmospheric electron density is reconstructed from different electron density related measurements, most often from ground-based measurements of satellite signals. Ty
The European Incoherent Scatter‐3D phased array radar system will be largely based on field‐programmable gate array (FPGA) firmware electronics that carry out the signal processing by using different digital filters. In this paper we have present
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a56d25407e721fa60e1690fe0da1937e
http://urn.fi/urn:nbn:fi-fe2019121348051
http://urn.fi/urn:nbn:fi-fe2019121348051
Autor:
Mikko Orispää, Johannes Norberg, Kirsti Kauristie, Markku Lehtinen, Lassi Roininen, Juha Vierinen, Ilkka Virtanen
Publikováno v:
Atmospheric Measurement Techniques, Vol 9, Iss 4, Pp 1859-1869 (2016)
Copernicus Publications
Copernicus Publications
We validate two-dimensional ionospheric tomography reconstructions against EISCAT incoherent scatter radar measurements. Our tomography method is based on Bayesian statistical inversion with prior distribution given by its mean and covariance. We emp
Publikováno v:
Annales Geophysicae, Vol 26, Pp 2419-2426 (2008)
Annales Geophysicae, Vol 26, Iss 8, Pp 2419-2426 (2008)
Scopus-Elsevier
Annales Geophysicae, Vol 26, Iss 8, Pp 2419-2426 (2008)
Scopus-Elsevier
We present a novel method for analyzing range and Doppler spread targets in the amplitude domain using linear statistical inversion. The result of the analysis is an estimate of the range dependent amplitude behaviour of the target backscatter during
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8258e9927471a66a17040d83db73eb45
https://www.ann-geophys.net/26/2419/2008/
https://www.ann-geophys.net/26/2419/2008/
Publikováno v:
Annales Geophysicae, Vol 26, Iss 3, Pp 571-581 (2008)
Annales Geophysicae, Vol 26, Pp 571-581 (2008)
Scopus-Elsevier
Mikko Orispää
ResearcherID
Annales Geophysicae, Vol 26, Pp 571-581 (2008)
Scopus-Elsevier
Mikko Orispää
ResearcherID
The present standard EISCAT incoherent scatter experiments are based on alternating codes that are decoded in power domain by simple summation and subtraction operations. The signal is first digitised and then different lagged products are calculated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::acb9e7115af4b34e2548b282797968d5
https://www.ann-geophys.net/26/571/2008/
https://www.ann-geophys.net/26/571/2008/
Autor:
Jorge L. Chau, Derek McKay, Juha P. Vierinen, Cesar La Hoz, Thomas Ulich, Markku Lehtinen, Ralph Latteck
Source at https://doi.org/10.5194/acp-18-9547-2018. Polar mesospheric summer echoes (PMSEs) have been long associated with noctilucent clouds (NLCs). For large ice particles sizes and relatively high ice densities, PMSEs at 3m Bragg wavelengths are k
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::92d52830d578fb60103742cef2e7fab0
https://hdl.handle.net/10037/13993
https://hdl.handle.net/10037/13993
Autor:
D. McKay-Bukowski, Markku Lehtinen, A. Schoenmakers, Jan Pieter de Reijer, Toivo Iinatti, Antti Kero, M. J. Norden, Nico Ebbendorf, Carl-Fredrik Enell, Mikko Orispää, Esa Turunen, Peter Gruppen, Henri Meulman, Olaf Wucknitz, Klaas Stuurwold, Markku Postila, Michiel A. Brentjens, T. Grit, Lassi Roininen, Juha Vierinen, Tero Raita, Thomas Ulich, Ilkka Virtanen, Richard Fallows, Marchel Gerbers
Publikováno v:
IEEE Transactions on Geoscience and Remote Sensing. 53:1440-1451
The Kilpisjarvi Atmospheric Imaging Receiver Array (KAIRA) is a dual array of omnidirectional VHF radio antennas located near Kilpisjarvi, Finland. It is operated by the Sodankyla Geophysical Observatory. It makes extensive use of the proven LOFAR an
Autor:
L j Johannes Norberg, Juha Vierinen, Lassi Roininen, D. McKay-Bukowski, Olaf Amm, Markku Lehtinen
Publikováno v:
Radio Science. 50:138-152
We present a novel ionospheric tomography reconstruction method. The method is based on Bayesian inference with the use of Gaussian Markov random field priors. We construct the priors as a system of stochastic partial differential equations. Numerica