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Tuesday, April 28, 2020 | History

3 edition of Microwave backscatter and attenuation dependence of leaf area index for flooded rice fields found in the catalog.

Microwave backscatter and attenuation dependence of leaf area index for flooded rice fields

Microwave backscatter and attenuation dependence of leaf area index for flooded rice fields

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  • 39 Currently reading

Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, D.C, Springfield, Va .
Written in English

    Subjects:
  • Microwave scattering.,
  • Leaf area index.,
  • Wetlands.,
  • Microwave attenuation.,
  • Imaging radar.,
  • Radar scattering.,
  • Backscattering.,
  • Mathematical models.,
  • Remote sensing.

  • Edition Notes

    StatementStephen L. Durden, Leslie A. Morrissey, and Gerald P. Livingston.
    SeriesNASA-TM -- 112133., NASA technical memorandum -- 112133.
    ContributionsMorrissey, Leslie A., Livingston, Gerald P., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15498422M

    Methane Emissions From Texas Rice Fields: Ronald L. Sass and Frank M. Fisher. Research has been conducted over the period from to to describe as fully as possible various factors that influence methane production and emission from rice fields in the Texas Gulf Coast area near 94o30'W, 30oN. The University of Kansas prohibits discrimination on the basis of race, color, ethnicity, religion, sex, national origin, age, ancestry, disability, status as a veteran, sexual orientation, marital status, parental status, retaliation, gender identity, gender expression and genetic information in the University's programs and activities.


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Microwave backscatter and attenuation dependence of leaf area index for flooded rice fields Download PDF EPUB FB2

Microwave backscatter and attenuation dependence on leaf area index for flooded rice fields Abstract: As part of an effort to determine whether radar is suitable for wetland vegetation monitoring the authors have studied the dependence of microwave backscatter and attenuation on leaf area index (LAI) for flooded rice by: Wetlands are important for their role in global climate as a source of methane and other reduced trace gases.

As part of an effort to determine whether radar is suitable for wetland vegetation monitoring, we have studied the dependence of microwave backscatter and attenuation on leaf area index (LAI) for flooded rice fields. Get this from a library.

Microwave backscatter and attenuation dependence of leaf area index for flooded rice fields. [Stephen L Durden; Leslie A Morrissey; Gerald P Livingston; United States.

National Aeronautics and Space Administration.]. As part of an effort to determine whether radar is suitable for wetland vegetation monitoring, we have studied the dependence of microwave backscatter and attenuation on leaf area index (LAI) for flooded rice fields.

We find that the radar return from a flooded rice field does show dependence on LAI. monitoring, we have studied the dependence of microwave backscatter and attenuation on leaf area index (LAI) for flooded rice fields.

We find that the radar return from a flooded rice field does show dependence on LAI. In particular, the C-band VV cross section per unit area decreases with increasing LAI. A simple model for scattering from rice. Leaf area index estimation of lowland rice using semi-empirical backscattering model.

“ Microwave backscatter and attenu-ation dependence on leaf area index for flooded rice fields. Thus, the single most important near-term contribution to be made in this area may be the systematic measurement of multifrequency microwave extinction and backscatter in falling Microwave backscatter and attenuation dependence of leaf area index for flooded rice fields book, using suitable combinations of low-power radars and well-calibrated microwave attenuation links covering horizontal distances of one to several by: The purpose of this paper is to examine the relationship between the microwave backscattering coefficient of a vegetation canopy (OOa~) and the canopy's leaf area index (LAI)-- the latter determining the solar radiation intercepted by the canopy, which in turn is an important component of crop-yield by: On the Bragg Scattering Observed in L-Band Synthetic Aperture Radar Images of Flooded Rice Fields studied the dependence of microwave backscatter and attenuation on leaf area index (LAI) for.

Polarimetric Backscattering Coefficients of Flooded Rice Fields at L- and C-Bands: Measurements, Modeling, and Data Analysis leaf area index, and leaf size. To study the incidence angle effect, the scatterometer microwave sensors can be more effective in monitoring rice growth than optical sensors, since a longer- File Size: KB.

Waterline mapping in flooded vegetation from airborne SAR imagery. G.P. LivingstonMicrowave backscatter and attenuation dependence on leaf area index for flooded rice fields.

IEEE Transactions on Geoscience and Remote Sensing, 33 (3) (), pp. Cited by: (). Measuring leaf area index of plant canopies with branch architecture.

Microwave backscatter and attenuation dependence on leaf area index for flooded rice fields. Microwave Radar response to canopy moisture, leaf area index and dry weight of wheat, corn, and sorghum.

Remote Sens. Environ. ().Author: Guang Zheng and L. Monika Moskal. IEEE Transactions on Geoscience and Remote Sensing, Volume export records of this page. first hits only: XML; Microwave backscatter and attenuation dependence on leaf area index for flooded rice fields. view.

This article presents the analysis of the Bragg scattering phenomenon which has been observed in the images of machine-planted rice paddies acquired by the JERS-1 L-band synthetic aperture radar (SAR). The simultaneous measurements of rice plants were made at the SAR data acquisition times.

Large differences of dB in image intensity between the transplanting. S. Durden L. Morrissey G. Livingston () ArticleTitle Microwave backscatter and attenuation dependence on leaf area index for flooded rice fields.

Institute of Electrical and Electronics Engineers Transactions on Geoscience and Remote Sensing 33 – Occurrence Handle /Cited by:   Vineet Kumar, Mamta Kumari, and Sudip Kumar Saha "Leaf area index estimation of lowland rice using semi-empirical backscattering model," Journal of Applied Remote Sensing 7(1), (26 November ).Cited by: 7.

rice fields and the manually planted rice fields have almost the same backscattering coefficients. Fig.2 Backscatter coefficients as a function of time Temporal Backscatter Behavior Similar to the C-band SAR backscatter, rice fields show strong variation in backscatter intensity at both HH and HV polarization with the crop growth.

Estimation of rice growth parameters by X-band radar backscattering data coefficients were calculated by applying a radar equation.

Plant variables, such as leaf area index (LAI), biomass, plant Microwave remote sensing, rice crop, scatterometer system, rice growth, backscattering coefficients 1. INTRODUCTION. Durden, S.L., L.A. Morrissey and G.P.

Livingston. "Microwave Backscatter and Attenuation Dependence on Leaf Area Index for a Flooded Rice Field." IEEE Transactions on Geoscience and Remote Sensing 33 ():   Inthe need for a compendium on backscatter acquisition, processing and interpretation was highlighted during the annual GeoHab meeting in Rome.

Subsequently, the Backscatter Working Group (BSWG) was created to produce the document “Guidelines and recommendations for backscatter measurements by seafloor-mapping sonars”. Modeling Surface Soil Moisture from Microwave Remote Sensing Data in Solani River Catchment Uttarakhand India.

Backscatter Coefficient, Leaf Area Index (LAI), Multiple Linear Regression (MLR), Solani River, ERS-2 SAR plays a dominant part in attenuation processes of the backscatter coefficient (Attema and Ulaby, ). PWC can be. The km wide swath of the ERS Wind scatterometer and its orbit geometry allows the measurement of the microwave backscatter of all the Antarctic region between latitudes 55°S and 79°S every three days.

The values of the backscatter coefficient depend on the incidence angle and look direction of the antenna beams. Radar Backscattering Measurements of Paddy Rice Field using Multifrequency(L, C and X) and full Polarization Many plant parameters such as leaf area index (LAI), examine the temporal behaviour of the radar backscatter from rice crops during the growth period at multi-frequency (L, C, X-band) with angular response.

Results using multi-temporal RADARSAT-1 imagery have confirmed that C-HH backscatter can detect differences in crop type, crop growth stage and crop indicators like crop height, biomass and leaf area index. Active microwave systems have a significant advantage over optical systems, particularly for crop monitoring, since SAR acquisitions are Cited by: The complex dielectric constant is a measure of the electric properties of surface materials.

It consists of two parts (permittivity and conductivity) that are both highly dependent on the moisture content of the material considered. In the microwave region, most natural materials have a dielectric constant between 3 and 8, in dry conditions.

"Microwave Backscatter and Attenuation Dependence on Leaf Area Index for a Flooded Rice Field." IEEE Transactions on Geoscience and Remote Sensing, L.

Johnson, J. Miller, R. McCreight, J. Freemantle, J. Runyon and P. Gong. "Remote Sensing of Seasonal Leaf Area Index Across the Oregon Transect." Ecological Applications () Backscatter is a compendium of the best technical articles that have been in Scatterpoint, the UK Microwave Group newsletter (and its predecessor) over the period to The original publication in was an A5 size book of pages and is an excellent reference with many articles on all aspects of microwaves.

A time domain processing technique is used to extract depth and frequency dependent signal ratios for the sample and the reference phantom.

The attenuation coefficient and backscatter coefficient of the sample are found from these ratios. The method is tested using tissue-mimicking phantoms with known scattering and attenuation properties. PMID:Cited by:   The ultimate goal of quantitative ultrasound (QUS) imaging methods based on backscatter coefficient (BSC) estimates is to obtain system-independent structural information about samples.

In the current study, three BSC estimation methods were compared and evaluated using the same backscattered pressure datasets in order to assess their by: 草原是干旱区生态系统中重要的可再生资源。本文基于草本植被的结构特征,利用asar和tm数据,结合mimics模型,提出了一种估算干旱区草原地上植被生物量的方法。该方法将光学遥感数据容易反演的叶面积指数(lai)作为反演生物量模型的参数之一,并利用lai成功估算了单位面积内的草.

RADAR REMOTE SENSING FOR ESTIMATION OF SURFACE SOIL MOISTURE AT THE WATERSHED SCALE 5 and R is a surface roughness term (Engman and Chauhan, ). Considering this, many algorithms using single-wavelength, single-polarization SAR for estimatingm sfollow a standard two-step approach, where the first step is to estimate and remove the signal due to backscatterFile Size: 92KB.

MICROWAVE EMISSION AND SCATTERING FROM VEGETATED TERRAIN (NASA-CR) MICROWAVE EMISSION AND N SCATTERING FROM VEGETATED TERRAIN (Texas A&1n Univ.) p HC $ CSCL 08F Unclas G3/13 by TERRELL GENE SIBLEY August I supported by National Aeronautics and Space Administration File Size: 2MB.

Estimation of Canopy Attenuation at L-band by a Time Domain Analysis of Radar Backscatter Response moisture estimation on a global basis because the primary physical property that affects the microwave measurement is directly dependent on the amount of water present in the soil.

Time Domain Analysis of Radar Backscatter Response A File Size: KB. The tidal-flat low marsh produced less attenuation due to the lack of continuous vegetation cover.

The transition zone showed the least attenuation. A "volume scattering index" (vsi) was adapted from [2] and used as a measure of the depolarization relative to the sum of the co-polarized and cross-polarized returns.

SAR References. Beckmann, P. and A. Spizzichino, The Scattering of Electromagnetic Waves From Rough Surfaces, New York, New York: Pergamon,pp. and You can write a book review and share your experiences. Other readers will always be interested in your opinion of the books you've read.

Whether you've loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them. Soil moisture estimation in a semiarid rangeland using ERS-2 and TM imagery Cuizhen Wanga,*, Jiaguo Qia, Susan Moranb, Robin Marsettb aCentre for Global Change and Earth Observations and Department of Geography, Michigan State University, Manly Miles Building, South Harrison Road, East Lansing, MIUSA bUSDA-ARS Southwest Watershed Research Cited by:   Read "Waterline mapping in flooded vegetation from airborne SAR imagery, Remote Sensing of Environment" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

This saturation point is due to the competing mechanisms of scattering and attenuation (absorption) of microwave energy in the canopy of the vegetation, and is highly dependent on the canopy density, stem density, tree species, and vegetation and soil moisture conditions, as well as the characteristics of the radar data by: BACKSCATTER ANALYSIS USING MULTI-TEMPORAL SENTINEL-1 SAR DATA FOR CROP GROWTH OF MAIZE IN KONYA BASIN, TURKEY.

In all visited fields, the backscatter values showed similar trends in four periods. To reduce the effects of mixture of the classes, the polygons were the backscattering coefficient is reduced due to the attenuation by: 1.

COMPARISON OF MICROAW VE BACKSCATTER ANISOTROPY PARAMETERISATIONS OVER THE ANTARCTIC ICE SHEET Alexander D. Frasera, Neal W. Young a,b and Neil Adamsc aAntarctic Climate & Ecosystems Cooperative Research Centre University of .Read "SIR-C/X-SAR observations of rain storms, Remote Sensing of Environment" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

The soil wetness condition is a useful indicator of inundation hazard in floodplains, such as the Poyang Lake floodplain. Special Sensor Microwave Imager (SSM/I) passive microwave data were used to monitor water-saturated soil and open water areas of the Poyang Lake floodplain from tocapturing the inundation patterns of this area in space and Cited by: 9.