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Algorithm for determining attitude of objects using GNSS signals / A. M. Aleshechkin, A. M. Aleshechkin // 18th Saint Petersburg International Conference on Integrated Navigation Systems, ICINS 2011 - Proceedings. - 2011. - P365-374 . - ISBN 9785919950042 (ISBN)
Кл.слова (ненормированные):
ambiguity -- phase -- satellite radionavigation systems -- algorithms -- maximum likelihood -- navigation systems -- radio navigation -- ambiguity -- ambiguity resolution -- angular orientation -- gnss signals -- phase -- research and development -- satellite radionavigation -- sorting method -- global positioning system
Аннотация: In this report the results of research and development of the algorithm for determining the objects angular orientation using the GLONASS and GPS signals are given. The results of evaluation of the correct ambiguity resolution probability are presented to determine the angular orientation using the sorting method with the selection of the optimim combination of integral ambiguities by the criterion of maximum likelihood. Unlike the known algorithms, in the propose method along with determining angular orientation the distance between the antennas of the object is estimated. Furthermore, the results of experimental studies of the proposed method are discussed.

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Держатели документа:
Siberian Federal University, 28, Kirenskogo St., Krasnoyarsk, Russian Federation

Доп.точки доступа:
Aleshechkin, A.M.; Saint Petersburg International Conference on Integrated Navigation Systems, ICINS 2011 (30 May 2011 through 1 June 2011, ) Conference code: 109063(18th ; )
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Crown's anisotropy of a tree and scattering the signals of navigation satellites frequency band L1 / V. Podoprigora, A. Sorokin, D. Makarov, D. Kharlamov // E3S Web of Conferences. - 2020. - Vol. 149. - Ст. 02005DOI 10.1051/e3sconf/202014902005. - Cited References: 7
Кл.слова (ненормированные):
Anisotropy -- Forestry -- Navigation -- Satellites
Аннотация: The model of interaction of signals from navigation satellites with the tree crown is considered. The contribution of the anisotropy of the dielectric constant to the cross section of radio wave scattering due to the orientational ordering of the branches is shown. The calculation of the scattering cross sections for small and large elements is presented. The tensor of orientational ordering of tree branches with division into tiers differing in the size and orientation of elements is introduced. Test measurements of navigation satellite signals passed through the crowns of spruce trees were carried out.

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Держатели документа:
Institute of Physics. A.V. Kirensky, Sb Ras, Akademgorodok, 50, Krasnoyarsk, 660036, Russian Federation
Federal Research Center ksc Sb Ras, Akademgorodok, 50, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Avenue Svobodny, 79, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Podoprigora, V. G.; Подопригора, Владимир Георгиевич; Sorokin, A.; Makarov, D.; Kharlamov, D.; Regional Problems of Earth Remote Sensing(10-13 September 2019 ; Krasnoyarsk, Russian Federation)
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Interaction of satellite navigation signals with forest and snow-ice layers / M. Y. Reushev, V. G. Podoprigora, D. S. Makarov [et al.] // Russ. Phys. J. - 2023. - Vol. 66, Is. 6. - P. 706-711, DOI 10.1007/s11182-023-02996-z. - Cited References: 8 . - ISSN 1064-8887. - ISSN 1573-9228
Кл.слова (ненормированные):
global navigation satellite system reflectometry -- navigation signal -- interference -- multipath echoes -- surface layers
Аннотация: The paper studies parameters of the snow-ice cover and forest ground determined by the integrated approach based on the global navigation satellite system reflectometry. Experimental data on the amplitude and time response of satellite navigation signals are processed by fast Fourier transform and then analyzed using mathematical methods based on the multipath echoes model in terms of geometrical optics. Using a combination of reflectometry and numerical simulation of the surface layers based on local weather data, it is possible to evaluate not only the current state of these layers, but also predict their dynamic development.

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Держатели документа:
Krasnoyarsk Research Center of the Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics of the Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Institute of Computational Modeling of the Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Reushev, M. Y.; Podoprigora, V. G.; Подопригора, Владимир Георгиевич; Makarov, D. S.; Kharlamov, D. V.; Vasiliev, E. V.
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Orientational ordering of tree elements in the dielectric permittivity model of a forest stand / A. V. Sorokin, V. G. Podoprigora, D. S. Makarov [et al.] // Russ. Phys. J. - 2020. - Vol. 63, Is. 2. - P. 238-243, DOI 10.1007/s11182-020-02026-2. - Cited References: 8 . - ISSN 1064-8887. - ISSN 1573-9228

РУБ Physics, Multidisciplinary

Кл.слова (ненормированные):
dielectric permittivity -- orientational ordering tensor -- anisotropy -- signals of navigation satellites
Аннотация: The dielectric characteristics of trees are studied for a dielectric permittivity model of a forest stand of L1 band signals of navigation satellites. The contribution of the orientational ordering of tree elements and of the wood anisotropy to the effective wood dielectric permittivity epsilon has been estimated. The crown layer has the height-depend anisotropy increment epsilon and the orientational ordering of branch tensor elements. The anisotropy gradients in the layer of trunks are determined by the height-dependent wood volume of a single tree and the tree height distribution in a large forest.

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Публикация на русском языке Ориентационная упорядоченность элементов дерева в модели диэлектрической проницаемости древостоя [Текст] / А. В. Сорокин, В. Г. Подопригора, Д. С. Макаров [и др.] // Изв. вузов. Физика. - 2020. - Т. 63 № 2. - С. 50-54

Держатели документа:
Russian Acad Sci, Siberian Branch, Fed Res Ctr, Krasnoyarsk Sci Ctr, Krasnoyarsk, Russia.
MF Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk, Russia.

Доп.точки доступа:
Sorokin, A. V.; Сорокин, Анатолий Васильевич; Podoprigora, V. G.; Подопригора, Владимир Георгиевич; Makarov, D. S.; Kharlamov, D. V.; Baltice, V. V.
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Podoprigora, V. G.
Peculiarities the navigation satellites signals scattering in the layered structure of the tree stand / V. Podoprigora, A. Sorokin, D. Kharlamov // E3S Web Conf. - 2020. - Vol. 223. - Ст. 03017DOI 10.1051/e3sconf/202022303017. - Cited References: 11
Кл.слова (ненормированные):
Remote sensing -- Attenuation process -- Layered Structures -- Navigation satellites -- Physical features -- Radio signals -- Signal transformation -- Tree stands -- Forestry
Аннотация: A scattering and attenuation processes of navigation satellite signals in the forest interaction with tree trank and crown layers a tree stand are presented. The influence of the boundaries soil - tree stand - crown - air on the characteristics of radio signals scattering after interaction with forest is considered. Structural and electro physical features of tree stand elements in the processes of interaction with signals of the L 1 range and experimental data on signal transformations the forest are analyzed.

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Держатели документа:
L.V.Kirensky Institute of Physics SB RAS, Krasnoyarsk, Russian Federation
Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Sorokin, A.; Kharlamov, D.; Подопригора, Владимир Георгиевич; Regional Problems of Earth Remote Sensing(29 September - 2 October 2020 ; Krasnoyarsk, Russian Federation)
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Sorokin, A. V.
Forest dielectric characteristics for navigation satellites signals in L1 range / A. V. Sorokin, V. G. Podoprigora, E. Ponomarev // E3S Web of Conferences. - 2019. - Vol. 75. - Ст. 01011, DOI 10.1051/e3sconf/20197501011. - Cited References: 9 . - ISBN 2267-1242
Аннотация: A structural dielectric model of the forest is presented taking into account the wood Biomass distribution. The multi-scale structural formations of the individual trees and the stand as a whole as a hierarchical system of non-interacting components of the mixed dielectric are discussed. Layers of crowns and trunks are distinguished as anisotropic dielectric media with gradient boundaries. The possibility of using the orientation parameter of the order of branches in the crown layer to estimate the gradients of the effective permittivity of the inhomogeneous distribution and its spatial anisotropy is analyzed. A comparative analysis of the features of the effective dielectric permittivity of pine and birch forests is carried out. The possibilities of using a layered anisotropic dielectric forest model to describe the transformation of GPS and GLONASS signals in order to restore the biometric characteristics of the forest are considered.

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Держатели документа:
Federal Research Center KSC SB RAS
Siberian Federal University
Reshetnev Siberian State Univ Sci & Technol,

Доп.точки доступа:
Podoprigora, V. G.; Подопригора, Владимир Георгиевич; Ponomarev, E. I.; Сорокин, Анатолий Васильевич; Региональные проблемы дистанционного зондирования Земли, международная конференция(5 ; 2018 ; сент. ; 11-14 ; Красноярск); Conference on regional problems of earth remote sensing(2018 ; Sept. ; 11-14 ; Krasnoyarsk); Сибирский федеральный университет
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The use of navigation satellites signals for determination the characteristics of the soil and forest canopy / V. L. Mironov, S. V. Fomin [и др.] // IEEE International Geoscienceand Remote Sensing Symposium (IGRASS) : Proceedings. - Munich, 2012. - P. 7527-7529, DOI 10.1109/IGARSS.2012.6351890 . - ISBN 978-1-4673-1159-5
Аннотация: In this paper presents the measurements of the interference pattern of GNSS signals recorded on Right Hand Circular Polarization (RHCP) above the ploughed field, soil covered grass and under forest canopy. In addition, the theoretical models which links the interferometric pattern, recorded Global Navigation Satellite System (GNSS) reciever on RHCP, with the soil moisture and the attenuation of electromagnetic wave in forest canopy is presented. It is shown, that the interference pattern is recorded by GNSS receiver on the RHCP, weakly dependent on the moisture and surface roughness of the soil. At the same time retrieved value of soil moisture has an error of the order of the measured value. The weak dependence of the interference pattern, recorded by the GNSS receiver on the RHCP, from the properties of the underlying surface, for the first time have been used to measure the attenuation coefficient of the forest canopy.

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Доп.точки доступа:
Mironov, V. L.; Миронов, Валерий Леонидович; Fomin, S. V.; Фомин, Сергей Викторович; Muzalevskiy, K. V.; Музалевский, Константин Викторович; Sorokin, A. V.; Сорокин, Анатолий Васильевич; Mikhaylov, M. I.; Михайлов, Михаил Иванович; IEEE International Geoscience and Remote Sensing Symposium (2012 ; July ; 22-27 ; Munich, Germany)
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Yashchenko, A. S.
The use of navigation satellites signals for measurement the absorbance of the forest canopy / A. S. Yashchenko, P. P. Bobrov, V. L. Mironov // Progress in Electromagnetics Research Symposium - Spring : IEEE, 2017. - P. 1227-1231, DOI 10.1109/PIERS.2017.8261936. - Cited References:5. - This research was supported by the Russian Foundation for Basic Research, project 16-35-50182 mol_nr. . - ISBN 978-1-5090-6269-0

РУБ Engineering, Electrical & Electronic

Аннотация: The results of measurement of the electromagnetic wave attenuation by the forest canopy at L-band are presented. The soil moisture mapping with reasonable accuracy in a global scale is only possible using the data of satellite radiometers at L-band frequency (SMOS and SMAP remote sensing programs). In the process of soil moisture retrieval from remote sensing data it is necessary to know the state of ecosystems on the Earth's surface. Forests are one of the dominant terrestrial ecosystems of Earth covering a large area of the surface. The attenuation coefficient of the forest canopy has high value even at L-band frequency. In the absence of forest canopy attenuation data the error of retrieval of the soil moisture for woodlands areas will have very high values. For this reason the emissivity model of Earth surface needs a priory data of the emissive and attenuate properties of the forest cover. One of methods of measurement of forest canopy attenuation coefficient at L-band frequency is using the signals of Global Navigation Satellite System (GNSS). Measurement showed that for elevation angle of 50 and 35 degrees the attenuation has a value range of -6 -10 dB and -10 -15 dB respectively. This makes it possible to claim that under certain conditions the soil radiothermal emission can make a noticeable contribution to the overall emission of surface covered forest. The results obtained in the measurement can be used in SMOS and SMAP sub-pixel data processing.

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Держатели документа:
Omsk State Pedag Univ, Omsk, Russia.
RAS, SB, Kirensky Inst Phys, Krasnoyarsk, Russia.

Доп.точки доступа:
Bobrov, P. P.; Mironov, V. L.; Миронов, Валерий Леонидович; Russian Foundation for Basic Research [16-35-50182 mol_nr]; Progress in Electromagnetics Research Symposium - Spring 2017(May 22-25, 2017 ; St Petersburg)
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    Восстановление влажности древесины лесного полога с использованием сигналов навигационных спутников / М. И. Михайлов [и др.] // Решетневские чтения : материалы XIX Междунар. науч. конф. : в 2-х ч... - 2015. - Ч. 1. - С. 308-310. - Библиогр.: 5. - Работа выполнена на базе Красноярского регионального центра коллективного пользования СО РАН в рамках программы фундаментальных исследований «Радиофизические методы диагностики окружающей среды» по теме «Изучение процессов поглощения и рассеяния электромагнитных волн СВЧ-диапазона лесными покровами Сибири». . - ISSN 1990-7702
   Перевод заглавия: Recovery of wood moisture for forest canopy using the signals of navigation satellites
Кл.слова (ненормированные):
влажность древесины -- лесной полог -- сигналы навигационных спутников -- коэффициент затухания -- moisture wood -- forest canopy -- signals of navigating satellites -- attenuation coefficient
Аннотация: Представлены экспериментальные данные для коэффициента ослабления сигналов навигационных спутников ГЛОНАСС и GPS в лесном пологе и оценка возможности их использования для восстановления влажности древесины.
The paper treats experimental data for the attenuation coefficient of signals from navigation satellites GLONASS and GPS in the forest canopy, and estimation the possibility of their use for determination of moisture wood.

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Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Михайлов, Михаил Иванович; Mikhaylov, M. I.; Сорокин, Анатолий Васильевич; Sorokin, A. V.; Фомин, Сергей Викторович; Fomin, S. V.; Музалевский, Константин Викторович; Muzalevskiy, K. V.; "Решетневские чтения", международная научно-практическая конференция(19 ; 2015 ; нояб. ; 10-14 ; Красноярск)
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10.

    Восстановление диэлектрической проницаемости почв при использовании сигналов навигационных спутников ГЛОНАСС и GPS / М. И. Михайлов [и др.] // Решетневские чтения : матер. XVI Междунар. науч. конф. : в 2 ч. - Красноярск, 2012. - Ч. 1. - С. 215-217 . - ISBN 1990-7702
   Перевод заглавия: Determination dielectric permittivity of the soil using of the navigation satellites glonass and gps signals
Аннотация: Представлены особенности временной зависимости нтерференционных сигналов правоциркулярной и вертикальной поляризации от навигационных спутников ГЛОНАСС и GPS для безлесных участков почвы. Обсуждаются экспериментальные данные по восстановлению влажности.
This paper presents of the time dependence of the interference signals RHCP and vertical polarization of the navigation satellites GLONASS and GPS for non-forest soil. Experimental data to restore moisture was discussed.

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Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Михайлов, Михаил Иванович; Mikhaylov, M.I.; Фомин, Сергей Викторович; Fomin, S.V.; Сорокин, Анатолий Васильевич; Sorokin, A.V.; Музалевский, Константин Викторович; Muzalevskiy, K. V.; "Решетневские чтения", международная научная конференция (16 ; 2012 ; нояб. ; 7-9 ; Красноярск)
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