Search Results - "Lehtinen, Markku"

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    Gaussian Markov Random Field Priors in Ionospheric 3-D Multi-Instrument Tomography by Norberg, Johannes, Vierinen, Juha, Roininen, Lassi, Orispaa, Mikko, Kauristie, Kirsti, Rideout, William C., Coster, Anthea J., Lehtinen, Markku S.

    “…In ionospheric tomography, the atmospheric electron density is reconstructed from different electron density related measurements, most often from ground-based…”
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    Journal Article
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    Effects of Scots pine paternal genotypes of two contiguous seed orchards on the budset and frost hardening of first-year progeny by Lehtinen, Markku, Pulkkinen, Pertti

    “…In Scots pine ( L.), it has been shown that the parental conditions have a role in the phenological variation among first-year seedlings. For this reason, it…”
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    Journal Article
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    Toxicity of Fatty Acid autoxidation products: highest anti-microbial toxicity in the initial oxidative phase by Matikainen, Jorma, Lehtinen, Markku, Pelttari, Eila, Elo, Hannu

    Published in Molecules (Basel, Switzerland) (01-01-2015)
    “…The autoxidation-degradation processes of polyunsaturated fatty acids give rise to toxic products, and the relative toxicity at different stages of the process…”
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    Journal Article
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    Bayesian statistical ionospheric tomography improved by incorporating ionosonde measurements by Norberg, Johannes, Virtanen, Ilkka I, Roininen, Lassi, Vierinen, Juha, Orispää, Mikko, Kauristie, Kirsti, Lehtinen, Markku S

    Published in Atmospheric measurement techniques (28-04-2016)
    “…We validate two-dimensional ionospheric tomography reconstructions against EISCAT incoherent scatter radar measurements. Our tomography method is based on…”
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    Journal Article
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    Polyphase-coded incoherent scatter measurements at Millstone Hill by Virtanen, Ilkka I., Lind, Frank D., Roininen, Lassi, Erickson, Philip J., Rideout, William C., Orispää, Mikko, Vierinen, Juha, Lehtinen, Markku S.

    Published in Radio science (01-09-2013)
    “…We report first results of polyphase‐coded incoherent scatter measurements at Millstone Hill. To our knowledge, these are the first incoherent scatter…”
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    Journal Article
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    Mismatched Filtering of Aperiodic Quadriphase Codes by Damtie, B., Lehtinen, M., Orispaa, M., Vierinen, J.

    Published in IEEE transactions on information theory (01-04-2008)
    “…Matched filtering of quadriphase coded radar signals creates unwanted sidelobes, which may mask important information. This correspondence presents a method of…”
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    Journal Article
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    Optimal True Time Delay Filter With Application to FPGA Firmware‐Based Phased Array Radar Signal Processing by Lehtinen, Markku, Damtie, Baylie, Orispää, Mikko

    Published in Radio science (01-09-2019)
    “…The European Incoherent Scatter‐3D phased array radar system will be largely based on field‐programmable gate array (FPGA) firmware electronics that carry out…”
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    Journal Article
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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

    Published in Radio science (01-08-2002)
    “…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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    Journal Article
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    Radar baud length optimisation of spatially incoherent time-independent targets by Lehtinen, Markku S., Damtie, Baylie

    “…While it may be a general belief that the optimal baud length for radar measurements of range extended targets should be close to the desired resolution, this…”
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    Journal Article
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    Substituted Salicylaldehydes as Potential Antimicrobial Drugs: Minimal Inhibitory and Microbicidal Concentrations by Pelttari, Eila, Lehtinen, Markku, Elo, Hannu

    “…Substituted salicylaldehydes are potent antibacterial and antifungal agents and may have chemotherapeutic potential. In the clinical setting, the minimal…”
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    Journal Article
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    Multi-static spatial and angular studies of polar mesospheric summer echoes combining MAARSY and KAIRA by Chau, Jorge L, McKay, Derek, Vierinen, Juha P, La Hoz, Cesar, Ulich, Thomas, Lehtinen, Markku, Latteck, Ralph

    Published in Atmospheric chemistry and physics (06-07-2018)
    “…Polar mesospheric summer echoes (PMSEs) have been long associated with noctilucent clouds (NLCs). For large ice particles sizes and relatively high ice…”
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    Journal Article
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    Antimicrobial Activity of Formylchromones: Detection by a Micro-Scale Method by Lehtinen, Markku, Pelttari, Eila, Elo, Hannu

    “…We report the antimicrobial activity of formylchromones. These compounds are remote structural analogues of nalidixic acid and quinolone antibiotics, and their…”
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    General incoherent scatter analysis and GUISDAP by Lehtinen, Markku S., Huuskonen, Asko

    “…In modern incoherent scatter measurements very complicated coding schemes are used to achieve the necessary statistical accuracy in the measurements. The…”
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    Journal Article
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    Kilpisjärvi Atmospheric Imaging Receiver Array - First results by Vierinen, Juha, McKay-Bukowski, Derek, Lehtinen, Markku S., Kero, Antti, Ulich, Thomas

    “…The Kilpisjärvi Atmospheric Imaging Receiver Array (KAIRA) is a dual antenna array radio receiver based on LOFAR technology. The main purpose of the system is…”
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    Conference Proceeding
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    A Proposed Solution to the Range–Doppler Dilemma of Weather Radar Measurements by Using the SMPRF Codes, Practical Results, and a Comparison with Operational Measurements by Pirttilä, Juha, Lehtinen, Markku S., Huuskonen, Asko, Markkanen, Markku

    Published in Journal of applied meteorology (1988) (01-09-2005)
    “…Based on the measurement principles used on incoherent scatter radars, the authors have developed the Simultaneous Multiple Pulse Repetition Frequency (SMPRF)…”
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    Journal Article
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