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1.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Mironov V. L., Kerr Y. H., Kosolapova L. G., Savin I. V., Muzalevskiy K. V.
Заглавие
: A temperature-dependent dielectric model for thawed and frozen organic soil at 1.4 GHz
Коллективы
: Russian Science Foundation [14-17-00656]
Место публикации
: IEEE J. Sel. Top. Appl. Earth Observ. Remote Sens.: IEEE-Institute Electrical and Electronics Engineers, 2015. - Vol. 8, Is. 9. - P.4470-4477. - ISSN 1939-1404,
DOI
10.1109/JSTARS.2015.2442295. - ISSN 2151-1535
Примечания
: Cited References:19. - This work was supported in part by a grant from the Russian Science Foundation under Project 14-17-00656
Предметные рубрики:
moisture
retrieval algorithm
active layer
validation
Ключевые слова
(''Своб.индексиров.''): dielectric constant--dielectric losses--dielectric measurement--l-band--modeling--soil
moisture
--soil properties
Аннотация:
A single-frequency dielectric model for thawed and frozen Arctic organic-rich (80%-90% organic matter) soil was developed. The model is based on soil dielectric data that were measured over the ranges of volumetric
moisture
from 0.007 to 0.573 cm3/cm3, dry soil density from 0.564 to 0.666 g/cm3, and temperature from 25°C to -30°C (cooling run), at the frequency of 1.4 GHz. The refractive mixing model was applied to fit the measurements of the soil's complex refractive index (CRI) as a function of soil
moisture
, with the values of temperature being fixed. Using the results of this fitting, the parameters of the refractive mixing model were derived as a function of temperature. These parameters involve the CRIs of soil solids as well as bound, transient, and free soil water components. The error of the dielectric model was evaluated by correlating the predicted complex relative permittivity (CRP) values of the soil samples with the measured ones. The coefficient of determination (R2) and the root-mean-square error (RMSE) were estimated to be R2 = 0.999, RMSE = 0.27 and R2 = 0.993, RMSE = 0.18 for the real and imaginary parts of the CRP, respectively. These values are in the order of the dielectric measurement error itself. The proposed dielectric model can be applied in active and passive remote-sensing techniques used in the areas with organicrich soil covers, mainly for the SMOS, SMAP, and Aquarius missions.
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2.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Bobrov P. P., Kroshka E. S., Muzalevskiy K. V.
Заглавие
: The effect of dielectric relaxation processes on the complex dielectric permittivity of soils at frequencies from 10 kHz to 8 GHz—Part II: Broadband analysis
Колич.характеристики
:11 с
Место публикации
: IEEE Trans. Geosci. Remote Sens. - 2024. - Vol. 62. - Ст.2000411. - ISSN 01962892 (ISSN),
DOI
10.1109/TGRS.2023.3340693. - ISSN 15580644 (eISSN)
Примечания
: Cited References: 51
Аннотация:
This article is the second in a series evaluating the effect of dielectric relaxation processes on the relatively effective complex dielectric permittivity (RCP) of soils. Part II is based on the results of experimental measurements in the frequency range 10 kHz to 8–20 GHz. The broadband dielectric spectrum model includes the high-frequency part as a model of the dielectric mixture and the relaxation part as the sum of three relaxation processes modeled by the Debye and Cole–Cole formulas. For modeling the high-frequency part of the spectrum, the Dobson and Mironov models were considered as possible options. As stated in Part I, the influence of relaxation processes on the imaginary part of the RCP extends up to frequencies of units of gigahertz. The increase in the imaginary part in these models was compensated by unrealistically high values of the specific electrical conductivity of free and bound water. We examined the correspondence of these models to experimental data at frequencies above 2–5 GHz, assuming that the conductivity of bound and free water is zero. The parameters of relaxation processes were found while solving the least-square optimization problem using the technique for determining the continuous distribution of relaxation times (DRTs). Found process parameters depend on the content of clay, organic carbon, and
moisture
of the samples. The more clay is in the soil, the greater the strength of these processes is. The influence of organic carbon with the conditions being equal consists in the reduction of the real and imaginary parts of RCP.
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3.
Вид документа
: Статья из сборника (однотомник)
Шифр издания
:
Автор(ы)
: Bobrov P. P., Mironov V. L., Yashchenko A. S., Kosolapova L. G.
Заглавие
: Comparison of Two Retrieval Soil
Moisture
Algorithms on SMOS Data
Коллективы
: IEEE International Geoscience and Remote Sensing Symposium (2012 ; July ; 22-27; Munich, Germany)
Место публикации
: IEEE International Geoscience and Remote Sensing Symposium (IGRASS): Proceedings. - Munich, 2012. - С. 1131-1134. - ISBN 978-1-4673-1159-5,
DOI
10.1109/IGARSS.2012.6351349
Аннотация:
We made the conclusion about the main deficiencies of the SMOS data Level 1c and Level 2 for the south part of Western Siberia. This was done for the period from 12.07.10 to 10.11.11 by studying SMOS data, periodic ground base measurements of the brightness temperature at 1.4 GHz and ground base measurements of
moisture
. We developed a simple algorithm for remote retrieval of soil
moisture
using data of brightness temperature given at SMOS Level 1c, compared the data of soil
moisture
, given at SMOS Level 2 with data calculated by our algorithm and in situ measurements of
moisture
.
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4.
Вид документа
: Статья из сборника (выпуск продолж. издания)
Шифр издания
:
Автор(ы)
: Mironov V. L., Kosolapova L. G., Fomin S. V., Savin I. V., Muzalevskiy K. V.
Заглавие
: Dielectric model for thawed and frozen organic soils at 1.4 GHz
Коллективы
: IEEE International Geoscience and Remote Sensing Symposium
Место публикации
: International Geoscience and Remote Sensing Symposium (IGARSS): IEEE, 2018. - Vol. 2018-July: 38th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 (22 July 2018 through 27 July 2018, ) Conference code: 141934. - Ст.8518443. - P.7180-7183. - ,
DOI
10.1109/IGARSS.2018.8518443
Примечания
: Cited References: 6. - The study was supported by a grant from the Russian Foundation for Basic Research (project № 16-05-00572), and project №0356-2018-0060.
Ключевые слова
(''Своб.индексиров.''): 1.4 ghz--dielectric model--
moisture
--organic soils--remote sensing--temperature--thawed and frozen soils
Аннотация:
Dielectric measurements of organic soils for five samples with different contents of organic matter are carried out in the temperature range from -30 °C to 25 °C in a wide frequency range from 0.45 to 16 GHz. On their basis, a simple single-frequency dielectric model of thawed and frozen organic soils has been created to calculate the complex relative permittivity of thawed and frozen organic soils, depending on the
moisture
, temperature and organic matter content at 1.4 GHz.
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5.
Вид документа
: Статья из сборника (однотомник)
Шифр издания
:
Автор(ы)
: Sutormin V. S., Krakhalev M. N., Prishchepa O. O., Zyryanov V. Ya.
Заглавие
: Director transformations within nematic droplets dispersed in polyvinylpirrolydon induced by temperature and
moisture
Коллективы
: IInternational LC Conference
Место публикации
: 22nd International LC Conference: Abstracts. - 2008. - Vol. 1. - P.378
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6.
Вид документа
: Статья из сборника (однотомник)
Шифр издания
:
Автор(ы)
: Mironov V. L., Kosolapova L. G., Demontoux F.
Заглавие
: Error of
Moisture
Retrieving from the SMOS Radiobrightness with the Use of the Temperature Dependable Soil Dielectric Model
Коллективы
: Progress In Electromagnetics Research Symposium
Серия:
PIERS 2011 Suzhou - Progress in Electromagnetics Research Symposium, Proceedings
Место публикации
: Proc. PIER. - 2011. - С. 709-711
eLibrary
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7.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Wigneron J. P., Chanzy A., Kerr Y. H., Lawrence H., Shi J. C., Escorihuela M. J., Mironov V. L., Mialon A., Demontoux F., de Rosnay P., Saleh-Contell K.
Заглавие
: Evaluating an improved parameterization of the soil emission in L-MEB
Коллективы
: Workshop on Remote Sensing and Modeling of Surface Properties (2nd; Jun 09-11, 2009; Toulouse, France)
Место публикации
: IEEE Trans. Geosci. Remote Sensing: IEEE-Institute Electrical and Electronics Engineers, 2011. - Vol. 49, Is. 4. - P.1177-1189. - ISSN 0196-2892,
DOI
10.1109/TGRS.2010.2075935
Примечания
: Cited References: 26
Предметные рубрики:
BAND MICROWAVE EMISSION
SURFACE-ROUGHNESS
1.4 GHZ
MODEL
MOISTURE
LAND
RADIOMETER
FREQUENCY
FIELDS
SPACE
Ключевые слова
(''Своб.индексиров.''): microwave remote sensing--radiometry--roughness--soil
moisture
(sm)--soil
moisture
and ocean salinity (smos)--soil surface
Аннотация:
In the forward model [L-band microwave emission of the biosphere (L-MEB)] used in the Soil
Moisture
and Ocean Salinity level-2 retrieval algorithm, modeling of the roughness effects is based on a simple semiempirical approach using three main "roughness" model parameters: H-R, Q(R), and N-R. In many studies, the two parameters Q(R) and N-R are set to zero. However, recent results in the literature showed that this is too approximate to accurately simulate the microwave emission of the rough soil surfaces at L-band. To investigate this, a reanalysis of the PORTOS-93 data set was carried out in this paper, considering a large range of roughness conditions. First, the results confirmed that Q(R) could be set to zero. Second, a refinement of the L-MEB soil model, considering values of N-R for both polarizations (namely, N-RV and N-RH), improved the model accuracy. Furthermore, simple calibrations relating the retrieved values of the roughness model parameters H-R and (N-RH - N-RV) to the standard deviation of the surface height were developed. This new calibration of L-MEB provided a good accuracy (better than 5 K) over a large range of soil roughness and
moisture
conditions of the PORTOS-93 data set. Conversely, the calibrations of the roughness effects based on the Choudhury approach, which is still widely used, provided unrealistic values of surface emissivities for medium or large roughness conditions.
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8.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Mironov V. L., Kosolapova L. G., Fomin S. V., Savin I. V.
Заглавие
: Experimental analysis and empirical model of the complex permittivity of five organic soils at 1.4 GHz in the temperature range from −30 °C to 25 °C
Место публикации
: IEEE Trans. Geosci. Remote Sensing. - 2019. - Vol. 51, Is. 6. - P.3778 - 3787. - ISSN 0196-2892,
DOI
10.1109/TGRS.2018.2887117
Примечания
: Cited References: 26. - This work was supported by the Russian Foundation for Basic Research under Grant 16-05-00572.
Аннотация:
The dielectric measurements were made for five organic soils taken from the tundra territories of Alaska, Yamal, and Taimyr, with the content of organic matter varying from 35% to 80%. The measurements were carried out in the temperature range from −30 °C to 25 °C, frequencies from 0.45 to 16 GHz and soil
moisture
from close to zero to the field
moisture
capacity. The refractive mixing model was applied to fit the measurements of the soil’s complex refractive index (CRI) as a function of soil
moisture
, with the values of temperature being fixed. As a result, a respective dielectric model was developed. The amounts of bound and transient water in the thawed and frozen soils were introduced as parameters of the developed model and derived as a function of temperature and content of soil organic matter. The other parameters which concern the CRIs of soil solids as well as bound, transient, and liquid soil water or ice components were derived as a function of temperature. The errors of the proposed model estimated in terms of the values of normalized root-mean-sqaure error for the real and imaginary parts of the soil complex relative permittivity appeared to be 6%–7% and 23%, respectively. The proposed dielectric model can be applied in active and passive remote sensing, in particular, for the SMOS, SMAP, and Aquarius missions after testing in ground-based experiments.
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9.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Zeyliger A. M., Muzalevskiy K. V., Zinchenko E. V., Ermolaeva O. S.
Заглавие
: Field test of the surface soil
moisture
mapping using Sentinel-1 radar data
Место публикации
: Sci. Total Environ. - 2022. - Vol. 807, Part 2. - Ст.151121. - ISSN 00489697 (ISSN),
DOI
10.1016/j.scitotenv.2021.151121
Примечания
: Cited References: 43. - The research was performed within the framework of the Russian Foundation for Basic Research project 19-29-05261 mk “Cartographic modelling of soil
moisture
reserves based on complex geophysical water content measurements for digital irrigated agriculture”
Аннотация:
Soil surface
moisture
is one of the key parameters for describing the hydrological state and assessing the potential availability of water for irrigated plants. Because the radar backscattering coefficient is sensitive to soil
moisture
, the application of Sentinel-1 data may support soil surface
moisture
mapping at high spatial resolution by detecting spatial and temporal changes at the field scale for precision irrigation management. This mapping is required to control soil water erosion and preferential water flow to improve irrigation water efficiency and minimise negative impacts on surface and ground water bodies. Direct observations of soil surface
moisture
(5-cm thickness) were performed at an experimental plot in the study site of the All-Russian Scientific Research Institute of Irrigated Agriculture, near the village Vodnyy, Volgograd region. Soil surface
moisture
retrieval from Sentinel-1 was performed at the same location. A second set of soil surface
moisture
was calculated for the soil sampling sites using the permittivity model, based on the estimates of soil surface characteristics: a) reflectivity, obtained by the neural network method from Sentinel-1 observations; b) roughness, obtained from the geodata of the stereoscopic survey with unmanned aerial vehicle Phantom 4 Pro. The raster set of soil surface
moisture
geodata was obtained based on the reflectivity geodata raster set to solve the inverse problem using a permittivity model that considers the soil texture of the experimental plot. The determination coefficient (0.948) and standard deviation (2.04%) were obtained by comparing both sets of soil
moisture
point geodata taken from the same soil sampling sites. The values confirmed a satisfactory linear correlation between the directly measured and indirectly modelled sets. A comparison of the two sets of geodata indicated a satisfactory reproduction of the first set by the second set. As a result, the developed method can be considered as the scientific and methodological basis of the new technology of soil surface
moisture
monitoring by radar, which is one of the basic characteristics used in precision irrigation management.
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10.
Вид документа
: Статья из сборника (однотомник)
Шифр издания
:
Автор(ы)
: Muzalevskiy K. V., Ruzicka Z., Zahvatov M. G., Savin I. V., Karavaysky A. Yu.
Заглавие
: First use of the Meteor-M No. 2/MTVZA-GYa radiometer for remote sensing of soil
moisture
and temperature in the Arctic region
Коллективы
: Progress in Electromagnetics Research Symposium - Spring 2017 , Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund [16-45-242162]; Program of Presidium of the Russian Academy of Sciences; [SB RAS II.12.1]
Место публикации
: Progress in Electromagnetics Research Symposium - Spring: IEEE, 2017. - С. 1426-1429. - ISBN 978-1-5090-6269-0,
DOI
10.1109/PIERS.2017.8261971
Примечания
: Cited References: 7. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project 16-45-242162, the Program of Presidium of the Russian Academy of Sciences "Arctic" and Program of SB RAS II.12.1.
Аннотация:
In this paper, the results of radiothermal remote sensing of
moisture
and temperature of thawed soil on a test site in the Taymyr Peninsula using full-polarimetric observations of brightness temperature at the frequency of 10.7 GHz are presented. The brightness temperature data were obtained from MTVZA-GYa radiometer on a board of Meteor-M No. 2 satellite with footprint area near the Norilsk city and Khatanga, the Russia Federation. The MTVZA-GYa data covered the period from January 1 to December 31, 2015. The method to retrieve the soil
moisture
and temperature was based on solving an inverse problem by minimizing the norm of the residuals between the observed and predicted values of the brightness temperature. The calculation of the brightness temperature was performed using a semi-empirical model of radio-thermal emission the parameters of which have been pre-calibrated at the test sites in the area of Norilsk and Khatanga, as well as using a soil dielectric model with high in organic matter. The dielectric model was especially designed based on laboratory measurements of the complex permittivity of the organic-rich soil samples, which were collected at the test site near Norilsk city. As a result, the values of the root-mean-square error between the retrieved and measured soil temperatures and soil
moisture
were not exceed 6.5o 0.06cm3/cm3, respectively for both test sites. These results indicate the perspectives of using the full-polarimetric observations of MTVZA-GYa radiometer on a board of Meteor-M No. 2 satellite in the X-band for the purpose of measuring the soil temperature and soil
moisture
in the Arctic region.
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11.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Fomin S. V., Muzalevskiy K. V.
Заглавие
: A dielectric model for frozen mineral soils at a frequency of 435 MHz
Место публикации
: Remote Sens. Lett. - 2021. - Vol. 12, Is. 9. - P.944-950. - ISSN 2150704X (ISSN),
DOI
10.1080/2150704X.2021.1947537
Примечания
: Cited References: 16. - This work was supported by the state assignment of the Ministry of Science and Higher Education of the Russian Federation [project No. 0287-2021-0034]
Аннотация:
A single frequency refractive mixing dielectric model at 435 MHz for frozen mineral soils is proposed. The model was created based on the laboratory dielectric measurements of three soil samples in the ranges of soil
moisture
from 0.01cm3 cm−3 to 0.42cm3 cm−3, temperature from– 30°C to– 1°C, clay content (by weight) from 9.1% to 41.3%. Coefficient of determination R2 and root mean square error (RMSE) predicted by the model and measured values for real () and imaginary () part of the complex relative permittivity (CRP) are = 0.988 (= 0.323) and = 0.987 (= 0.100). Compared to well-known spectroscopic models, this model is simpler in practical engineering use. The input parameters of the model are the volumetric soil
moisture
, temperature and the content of the clay fraction. The output parameters are the real and imaginary parts of the CRP. The created model may be used to develop new remote sensing retrieval algorithms of temperature, the content of unfrozen water and ice in the root zone of frozen soils for northern regions.ε 'ε ''R2ε 'RMSEε 'R2ε ''RMSEε ''
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12.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Zhou J., Chen Y., Jiang C., Milicevic B., Molokeev M. S., Brik M. G., Bobrikov I. A., Yan J., Li J., Wu M.
Заглавие
: High
moisture
resistance of an efficient Mn4+-activated red phosphor Cs2NbOF5:Mn4+ for WLEDs
Место публикации
: Chem. Eng. J. - 2021. - Vol. 405. - Ст.126678. - ISSN 13858947 (ISSN),
DOI
10.1016/j.cej.2020.126678
Примечания
: Cited References: 43. - This work was financially supported by grants from the National Natural Science Foundation of China (No. 51802359, 21801254, 51902354) and its Joint Funds of Yunnan and Guangdong Province (No. U1702254 and No. U1801253), Special Fund of Guangdong Province Project for Applied Science and Technology Research and Development (No. 2017B090917001), Guangdong Basic and Applied Basic Research Foundation (No. 2020A1515010556), the Fundamental Research Funds for the Central Universities (No. 19lgpy123), and China Postdoctoral Science Foundation (No. 2019M663230). M. G. Brik thanks the supports from the National Recruitment Program of High-end Foreign Experts (No. GDT20185200479 and GDW20145200225), the Programme for the Foreign Experts (No. W2017011) and Wenfeng High-end Talents Project (No. W2016-01) offered by Chongqing University of Posts and Telecommunications (CQUPT) , Estonian Research Council grant PUT PRG111, and European Regional Development Fund (TK141)
Аннотация:
Mn4+-activated fluoride red phosphors, the most important red phosphors for warm white light emitting diodes (LEDs), usually suffer from inherent poor
moisture
resistance which is a major obstacle to their long-lasting outdoor applications in a high humidity environment. Surface modification of phosphors by coating with either organic or inorganic shells is an effective way to improve waterproof stability. However, the coating procedure usually has a negative impact on the luminous efficacy due to the increased passivation shell thickness. In this work, Mn4+-activated oxyfluoroniobate (Cs2NbOF5), a highly efficient phosphor with internal quantum efficiency of ca. 82%, has been successfully synthesized and it is interesting to note that Cs2NbOF5:Mn4+ can exhibit remarkably improved waterproof stability even without surface coating compared to well-accepted commercial fluoride red-emitting phosphor, K2SiF6:Mn4+. The results obtained indicate that Nb5+ ions inside red phosphor play a crucial role in improving the water-resistant performance of Mn4+, which provides a new concept for overcoming the downside of their waterproof in humid conditions and maintaining the luminescence efficiency. In the final phase white LEDs with a high luminous efficacy of 174 lm/W (higher than commercial fluoride red phosphors), low correlated color temperature (3164 K) and high color rendering index (Ra = 90 and R9 = 85) have been fabricated using Cs2NbOF5:Mn4+.
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13.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Karavaisky A. Yu., Lukin Y. I.
Заглавие
: Dielectric model of the upper organic layer of forest soils for a frequency of 435 MHz
Колич.характеристики
:12 с
Место публикации
: Izv. Atmos. Ocean. Phys. - 2023. - Vol. 59, Is. 9. - P.1208-1219. - ISSN 00014338 (ISSN),
DOI
10.1134/S0001433823090104. - ISSN 1555628X (eISSN)
Примечания
: Cited References: 57. - We are grateful to Cand. Sci. (Phys.–Math.) K.V. Muzalevskii, Head of the Laboratory of Remote Sensing Radiophysics, for supporting this work, as well as to I.V. Savin for selecting the studied soil samplesThe study was performed within the framework of the state assignment of the Ministry of Science and Higher Education of Russia, project no. 0287-2021-0034
Аннотация:
A dielectric model based on the refractive dielectric model of the mixture of thawed and frozen forest organic soils in the root zone for a frequency of 435 MHz has been developed. The model is created on the basis of dielectric measurements of four soils whose organic matter content varies in the range from 15 to 31%. The dielectric measurements are carried out in the range of the gravimetric
moisture
from 0 to 0.6 g/g and temperature range from –30 to 25°C. The coefficient of determination (R2) between values calculated by themodel and measured values of the real (ε') and imaginary (ε'') parts of complex dielectric permittivity is 0.97. The normalized root-mean-square error is 16 and 21% for the real and imaginary parts of the complex dielectric permittivity, respectively. This dielectric model may be applied in remote sensing algorithms when retrieving the value of forest soil
moisture
in the root zone from radar and radiometric data.
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14.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Karavayskiy A. Yu., Lukin Y. I.
Заглавие
: Influence of dielectric relaxations of soil water on the temperature dependence of soil permittivity
Колич.характеристики
:10 с
Место публикации
: Opt. Spectrosc. - 2023. - Vol. 131, Is. 12. - P.1190-1199. - ISSN 0030400X (ISSN),
DOI
10.1134/S0030400X24700206. - ISSN 15626911 (eISSN)
Примечания
: Cited References: 23. - This work was supported by the Russian Science Foundation and the Krasnoyarsk Regional Fund of Science and Technology Support within the framework of scientific project no. 22-27-20112
Аннотация:
Using a generalized refractive mixture dielectric model, the influence of the relative permittivity spectra of bound and unbound water in mineral soil on the nature of the temperature dependence of the relative permittivity of natural mineral soil, with a clay fraction content of 41.3%, was studied in the electromagnetic field frequency range from 50 MHz to 15 GHz. The causes of the emergence of intersections in the relative permittivity spectra of mineral soil, obtained at different temperatures but for a sample of the same
moisture
content, have been studied. It has been proved that the emergence of such an intersection point in the frequency range up to 1.5 GHz is due to the Maxwell–Wagner effect in bound water. The dependences of the frequency of the intersection point of the relative permittivity spectra of mineral soil on the temperature and volumetric content of bound and unbound water have been studied.
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15.
Вид документа
: Статья из сборника (выпуск продолж. издания)
Шифр издания
:
Автор(ы)
: Karavayskiy A. Yu., Lukin Y. I.
Заглавие
: The effect of clay content on the spectra of permetivity of mineral soils at positive temperatures
Колич.характеристики
:4 с
Коллективы
: Radiation and Scattering of Electromagnetic Waves 2023
Место публикации
: Conf. Proc. - Radiat. Scatt. Electromagn. Waves, RSEMW. - 2023. - P.456-459. - ,
DOI
10.1109/RSEMW58451.2023.10201998
Примечания
: Cited References: 17. - The work was financially supported by the Russian Science Foundation and the Krasnoyarsk Regional Fund for Support of Scientific and Scientific and Technical Activities within the framework of the scientific project No. 22-27-20112
Аннотация:
In this research, it was studied the crossover frequencies of the spectra of the real part of the permittivity of moist mineral soils with different clay content from 10 to 64% in the frequency range from 15 MHz to 15 GHz and in the temperature range from 25 to 0 °C. Based on the experimental dependences obtained, empirical models were proposed for the average crossover frequency of the soil of the real part of the permittivity spectra in the range of changes of these frequencies values with temperature changes, as well as for the half-widths of the ranges of changes.
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16.
Вид документа
: Статья из сборника (однотомник)
Шифр издания
:
Автор(ы)
: Lawrence H., Demontoux F., Wigneron J, Mialon A., Duffour C., Kruszewski A., Mironov V., Kosolapova L., Kerr Y.
Заглавие
: L-Band Emission of Rough Soil Surface Covered with a Grass Litter Layer In cluding a
Moisture
Gradient: Comparison Between Experimental Data and a Numerical Modeling Approach
Коллективы
: International Symposium Recent Advances in Quantitative Remote Sensing
Место публикации
: 3rd International Symposium Recent Advances in Quantitative Remote Sensing. - 2010
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17.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Mikhaylov M. I., Muzalevskiy K. V., Mironov V. L.
Заглавие
: Testing semi-empirical model of reflection coefficient based on GNSSR measurements
Коллективы
: IEEE International Geoscience and Remote Sensing Symposium
Место публикации
: IEEE J. Sel. Top. Appl. Earth Observ. Remote Sens.: Proc.: IEEE-Institute Electrical and Electronics Engineers, 2016. - P.5264 - 5267. - ISSN 978-1-5090-3332-4,
DOI
10.1109/IGARSS.2016.7730371. - ISSN 2153-7003 (eISSN)
Примечания
: The study was performed thanks to a grant from the Russian Science Foundation (project №14-17-00656)
Ключевые слова
(''Своб.индексиров.''): permittivity model--smos--microwave radiometry--arctic tundra--soil
moisture
--soil temperature
Аннотация:
In this paper, with using of semi-empirical model of the reflection coefficient, which is implementing to calculate the brightness temperature of the SMOS spacecraft at 1.4GHz in [1], [2] the soil
moisture
was retrieved from the reflection coefficients, which were measured by GNSS-reflectometer at a test site on the Yamal Peninsula. The model of reflection coefficient with root-mean square error (RMSE) of 0.04 allows to predict the experimental values of the reflection coefficient and with RMSE of less than 0.09cm3/cm3 allows to retrieve the soil
moisture
in the layer of 0-6cm
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18.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Mironov V. L., Savin I. V.
Заглавие
: A temperature-dependent multi-relaxation spectroscopic dielectric model for thawed and frozen organic soil at 0.05–15 GHz
Место публикации
: Phys. Chem. Earth: PERGAMON-ELSEVIER SCIENCE LTD, 2015. - Vol. 83–84: Emerging science and applications with microwave remote sensing data. - P.57-64. - ISSN 1474-7065,
DOI
10.1016/j.pce.2015.02.011
Примечания
: Cited References: 14. - The study was supported by the Russian Science Foundation (project 14-17-00656).
Предметные рубрики:
ARCTIC SOIL
BOREAL
Ключевые слова
(''Своб.индексиров.''): organic soil--
moisture
--temperature--dielectric model--thawed and frozen soil--smos
Аннотация:
A dielectric model for thawed and frozen Arctic organic-rich soil (50% organic matter) has been developed. The model is based on soil dielectric measurements that were collected over ranges of gravimetric
moisture
from 0.03 to 0.55 g/g, dry soil density from 0.72 to 0.87 g/cm3, and temperature from 25 to −30 °C (cooling run) in the frequency range of 0.05–15 GHz. The refractive mixing dielectric model was applied with the Debye multi-relaxation equations to fit the measurements of the soil’s complex dielectric constant as a function of soil
moisture
and wave frequency. The spectroscopic parameters of the dielectric relaxations for the bound, transient bound, and unbound soil water components were derived and were complimented by the thermodynamic parameters to obtain a complete set of parameters for the proposed temperature-dependent multi-relaxation spectroscopic dielectric model for moist soils. To calculate the complex dielectric constant of the soil, the following input variables must be assigned: (1) density of dry soil, (2) gravimetric
moisture
, (3) wave frequency, and (4) temperature. The error of the dielectric model was evaluated and yielded RMSEε′ values of 0.348 and 0.188 for the soil dielectric constant and the loss factor, respectively. These values are on the order of the dielectric measurement error itself. The proposed dielectric model can be applied in active and passive microwave remote sensing techniques to develop algorithms for retrieving the soil
moisture
and the freeze/thaw state of organic-rich topsoil in the Arctic regions.
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19.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Mironov V. L., Savin I. V., Karavaysky A. Yu.
Заглавие
: Dielectric model in the frequency range 0.05 to 15 GHz at temperatures −30°C to 25°C for the samples of organic soils and litter collected in Alaska, Yamal, and Siberian Taiga
Коллективы
: IEEE International Geoscience and Remote Sensing Symposium
Место публикации
: IEEE J. Sel. Top. Appl. Earth Observ. Remote Sens.: Proc.: IEEE-Institute Electrical and Electronics Engineers, 2016. - P.2684-2687. - ISSN 978-1-5090-3332-4,
DOI
10.1109/IGARSS.2016.7729693. - ISSN 2153-7003
Ключевые слова
(''Своб.индексиров.''): remote sensing--organic soil--
moisture
--temperature--dielectric model--thawed and frozen soil
Аннотация:
We prove the possibility of creating a temperature dependent multi-relaxation spectroscopic dielectric model (TD MRSDM) for a set of organic soil containing 50% (Yamal tundra), 80% (Alaskan tundra) and 90% (boreal pine litter) of organic solids. The created model is based on the previously developed TD MRSDM for the Yamal tundra soil complemented with specific temperature dependences for the hydrological parameters pertaining for each specific soil. At that, the same values for spectroscopic and thermodynamic parameters of the TD MRSDM can be applied, as those were previously obtained in the case of the Yamal tundra soil. The statistical evaluation of the errors for the predicted values of complex dielectric permittivity in the cases of both the thawed and frozen soils with respect to the measured values were carried out. The standard deviations calculated for the Alaskan soil and the Siberian boreal litter appeared to be on the same order as the ones pertaining to the Yamal tundra soil.
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20.
Вид документа
: Статья из сборника (выпуск продолж. издания)
Шифр издания
:
Автор(ы)
: Mironov V. L., Molostov I. P., Scherbinin V. V.
Заглавие
: Dielectric model of a mineral arctic soil thawed and frozen at 0.05-15 GHz
Коллективы
: International Siberian Conference on Control and Communications
Место публикации
: Int. Sib. Conf. on Control and Communicat. (SIBCON 2015): Proceedings: IEEE-Institute Electrical and Electronics Engineers, 2015. - P.1-7. - ,
DOI
10.1109/SIBCON.2015.7147146
Ключевые слова
(''Своб.индексиров.''): arctic regions--dielectric model--dielectric relaxation--remote sensing--soil--temperature dependence--dielectric relaxation--
moisture
--remote sensing--soil
moisture
--soils--temperature--temperature distribution--thawing--thermodynamics--active and passive remote sensing--arctic regions--complex dielectric constant--dielectric modeling--soil dielectric constant--spectroscopic parameters--temperature dependence--thermodynamics parameters--soil surveys
Аннотация:
The dielectric model for an arctic soil both thawed and frozen has been developed. The model is based on the soil dielectric measurements carried out in the ranges of gravimetric
moisture
from 0.01 to 0.43 g/g, dry soil density from 1.25 to 1.83 g/cm3, and temperature from 25 to -30°C (cooling run), in the frequency range 0.05-15 GHz. To fit the results of measurements of the soil complex dielectric constant as a function of soil
moisture
and wave frequency, the refractive mixing dielectric model in conjunction with the Debye multi-relaxation equations were applied. As a result, the spectroscopic parameters of dielectric relaxations for the bound, transient bound, and unbound soil water components were derived, being further complimented with the thermodynamics parameters to ensure a complete set of parameters of the temperature dependent multi-relaxation spectroscopic dielectric model for moist soils proposed. To calculate complex dielectric constant of soil, the following input variables have to be assigned: 1) density of dry soil, 2) gravimetric
moisture
, 3) wave frequency, and 4) temperature. The error of the dielectric model was evaluated in terms of RMSE, yielding the values RMSE of 0.53 and 0.43 for the soil dielectric constant and loss factor, respectively. These values appeared to be in the order of the dielectric measurement error itself. The dielectric model suggested can be applied in the active and passive remote sensing techniques in microwave to develop algorithms for retrieving soil
moisture
and freeze/thaw state of the topsoil in the Arctic regions. © 2015 IEEE.
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