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1985 …2019
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Research Output 1985 2019

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2002
4 Citations (Scopus)

Information efficiency in hyperspectral imaging systems

Reichenbach, S. E., Cao, L. & Narayanan, R. M., Jul 1 2002, In : Journal of Electronic Imaging. 11, 3, p. 347-353 7 p.

Research output: Contribution to journalArticle

Imaging systems
Systems analysis
spectral bands
systems engineering
radiance

Land cover classification models using shuttle imaging radar (sir-c) data: A case study in new hampshire, u.s.a.

Narayanan, R. M. & Zhang, J., Jan 1 2002, In : Geocarto International. 17, 3, p. 59-68 10 p.

Research output: Contribution to journalArticle

land cover
radar
neural network
pixel
synthetic aperture radar
15 Citations (Scopus)

Multipath and ground clutter analysis for a UWB noise radar

Dawood, M. & Narayanan, R. M., Jul 1 2002, In : IEEE Transactions on Aerospace and Electronic Systems. 38, 3, p. 838-853 16 p.

Research output: Contribution to journalArticle

Spurious signal noise
Ultra-wideband (UWB)
Radar
Radar clutter
Radar cross section
54 Citations (Scopus)

Ultra-wideband continuous-wave random noise Arc-SAR

Garmatyuk, D. S. & Narayanan, R. M., Dec 1 2002, In : IEEE Transactions on Geoscience and Remote Sensing. 40, 12, p. 2543-2552 10 p.

Research output: Contribution to journalArticle

random wave
synthetic aperture radar
random noise
Synthetic aperture radar
Ultra-wideband (UWB)
2001
58 Citations (Scopus)

A review of wetlands remote sensing and defining new considerations

Rundquist, D. C., Narumalani, S. & Narayanan, R. M., Jan 1 2001, In : Remote Sensing Reviews. 20, 3, p. 207-226 20 p.

Research output: Contribution to journalArticle

wetlands
Wetlands
wetland
remote sensing
Remote sensing
66 Citations (Scopus)

FOPEN SAR imaging using UWB step-frequency and random noise waveforms

Xiaojian, X. U. & Narayanan, R. M., Oct 1 2001, In : IEEE Transactions on Aerospace and Electronic Systems. 37, 4, p. 1287-1300 14 p.

Research output: Contribution to journalArticle

Radar imaging
Synthetic aperture radar
Ultra-wideband (UWB)
Spurious signal noise
Frequency modulation

Fuzzy feature-based image mining in remote sensing

Li, J., Narayanan, R. M., Waltman, W. J. & Peters, A. J., Jan 1 2001, In : Proceedings of SPIE - The International Society for Optical Engineering. 4384, p. 46-55 10 p.

Research output: Contribution to journalArticle

Image Mining
Normalized Difference Vegetation Index
Remote Sensing
Data mining
remote sensing
21 Citations (Scopus)

Inverse synthetic aperture radar imaging using a coherent ultrawideband random noise radar system

Bell, D. C. & Narayanan, R. M., Nov 1 2001, In : Optical Engineering. 40, 11, p. 2612-2623 12 p.

Research output: Contribution to journalArticle

Inverse synthetic aperture radar
Radar imaging
synthetic aperture radar
Radar systems
random noise
7 Citations (Scopus)

Measurement of Stokes parameters of materials at 1064-nm and 532-nm wavelengths

Tan, S., Narayanan, R. M. & Kalshoven, J. E., Jan 1 2001, In : Proceedings of SPIE-The International Society for Optical Engineering. 4377, p. 263-271 9 p.

Research output: Contribution to journalArticle

Stokes
Optical radar
Wavelength
Polarization
Radar systems
4 Citations (Scopus)

On Wheeler’s method for efficiency measurement of small antennas

Huang, Y., Narayanan, R. M. & Kadambi, G. R., Jan 1 2001, In : IEEE Antennas and Propagation Society, AP-S International Symposium (Digest). 3, p. 346-349 4 p.

Research output: Contribution to journalArticle

Antennas
Experiments
55 Citations (Scopus)

Polarimetric processing of coherent random noise radar data for buried object detection

Xu, Y., Narayanan, R. M., Xu, X. & Curtis, J. O., Mar 1 2001, In : IEEE Transactions on Geoscience and Remote Sensing. 39, 3, p. 467-478 12 p.

Research output: Contribution to journalArticle

Spurious signal noise
Polarimeters
radar data
random noise
radar
9 Citations (Scopus)

Railroad track substructure monitoring using ground penetrating radar (GPR)

Narayanan, R. M., Kumke, C. J. & Li, D., Jan 1 2001, In : Rail International. 32, 1, p. 28-34 7 p.

Research output: Contribution to journalArticle

Railroad tracks
railroad
Radar
monitoring
Monitoring
56 Citations (Scopus)

Range sidelobe suppression technique for coherent ultra wide-band random noise radar imaging

Xu, X. & Narayanan, R. M., Dec 1 2001, In : IEEE Transactions on Antennas and Propagation. 49, 12, p. 1836-1842 7 p.

Research output: Contribution to journalArticle

Spurious signal noise
Radar imaging
Image enhancement
Jamming
Bandwidth
45 Citations (Scopus)

Receiver operating characteristics for the coherent UWB random noise radar

Dawood, M. & Narayanan, R. M., Apr 1 2001, In : IEEE Transactions on Aerospace and Electronic Systems. 37, 2, p. 586-594 9 p.

Research output: Contribution to journalArticle

Spurious signal noise
Ultra-wideband (UWB)
Probability density function
Electric delay lines
Photonics
14 Citations (Scopus)

Soil moisture estimation models using SIR-C SAR data: A case study in New Hampshire, USA

Narayanan, R. M. & Hirsave, P. P., Dec 1 2001, In : Remote Sensing of Environment. 75, 3, p. 385-396 12 p.

Research output: Contribution to journalArticle

synthetic aperture radar
Radar imaging
radar
Soil moisture
Synthetic aperture radar
29 Citations (Scopus)

Theoretical aspects of radar imaging using stochastic waveforms

Bell, D. C. & Narayanan, R. M., Feb 1 2001, In : IEEE Transactions on Signal Processing. 49, 2, p. 394-400 7 p.

Research output: Contribution to journalArticle

Radar imaging
Radar
Optical transfer function
Doppler radar
Random processes
135 Citations (Scopus)

Three-dimensional interferometric ISAR imaging for target scattering diagnosis and modeling

Xu, X. & Narayanan, R. M., Jul 1 2001, In : IEEE Transactions on Image Processing. 10, 7, p. 1094-1102 9 p.

Research output: Contribution to journalArticle

Inverse synthetic aperture radar
Radar
Radar imaging
Scattering
Image processing
2000
2 Citations (Scopus)

Dependence of image information content on gray-scale resolution

Narayanan, R. M., Sankaravadivelu, T. S. & Reichenbach, S. E., Jan 1 2000, In : Geocarto International. 15, 4, p. 17-30 14 p.

Research output: Contribution to journalArticle

information content
pixel
remote sensing
SIR
Landsat thematic mapper
2 Citations (Scopus)

Detection of buried pipes using polarimetric stepped-frequency GPR images

Narayanan, R. M., Becker, R. T. & Bashforth, M. B., Nov 1 2000, In : Pipes and Pipelines International. 45, 6, p. 15-31 17 p.

Research output: Contribution to journalArticle

Ground penetrating radar systems
Radar
Pipe
Polarization
Processing
101 Citations (Scopus)

Doppler estimation using a coherent ultrawide-band

Radar, R. N., Narayanan, R. M. & Dawood, M., Jun 1 2000, In : IEEE Transactions on Antennas and Propagation. 48, 6, p. 868-878 11 p.

Research output: Contribution to journalArticle

Electric delay lines
Spurious signal noise
Photonics
Microwaves
Bandwidth
5 Citations (Scopus)

Free-space microwave measurement of low moisture content in powdered foods

Narayanan, R. M. & Vu, K. T., Jan 1 2000, In : Journal of Food Processing and Preservation. 24, 1, p. 39-56 18 p.

Research output: Contribution to journalArticle

powdered foods
Microwave measurement
Microwaves
Powders
Moisture
2 Citations (Scopus)

Soil moisture estimation using combined multifrequency SAR data: A comparison between two inversion models using simulation

Narayanan, R. M. & Hegde, M. S., Jan 1 2000, In : Geocarto International. 15, 3, p. 65-76 12 p.

Research output: Contribution to journalArticle

simulation model
synthetic aperture radar
soil moisture
monitoring
simulation
1999
2 Citations (Scopus)

Application of principal component analysis to multisensor classification

Corner, B. R., Narayanan, R. M. & Reichenbach, S. E., 1999, In : Proceedings of SPIE - The International Society for Optical Engineering. 3584, p. 202-210 9 p.

Research output: Contribution to journalArticle

principal components analysis
Principal component analysis
Principal Component Analysis
Land Cover
Radar
Random Noise
Radar systems
System Development
random noise
Doppler

Effect of gray-scale resolution on the information content of remote sensing imagery

Narayanan, R. M., Sankaravadivelu, T. S. & Reichenbach, S. E., 1999, In : Proceedings of SPIE - The International Society for Optical Engineering. 3808, p. 192-201 10 p.

Research output: Contribution to journalArticle

gray scale
Information Content
imagery
Remote Sensing
remote sensing
5 Citations (Scopus)

Information theoretic assessment and design of hyperspectral imaging systems

Reichenbach, S. E., Xiong, Y., Narayanan, R. M. & Cao, L., 1999, In : Proceedings of SPIE - The International Society for Optical Engineering. 3716, p. 100-104 5 p.

Research output: Contribution to journalArticle

Hyperspectral Imaging
Imaging System
Imaging systems
spectral bands
Systems analysis
2 Citations (Scopus)

Multiple diffraction of a line source field by a three-part resistive plane

Yildirim, O. & Narayanan, R. M., Jan 1 1999, In : AEU-Archiv fur Elektronik und Ubertragungstechnik. 53, 1, p. 3-10 8 p.

Research output: Contribution to journalArticle

Diffraction
Factorization
Boundary value problems
Integral equations
1 Citation (Scopus)
Spurious signal noise
Inverse synthetic aperture radar
Radar Imaging
Radar imaging
Random Noise
Ground Penetrating Radar
Ground penetrating radar systems
ground penetrating radar
log spiral antennas
Polarization
6 Citations (Scopus)
Ground Penetrating Radar
rail transportation
Railroad tracks
ground penetrating radar
Radar
4 Citations (Scopus)

Remote sensing of vegetation stress and soil contamination using CO2 laser reflectance ratios

Narayanan, R. M. & Pflum, M. T., Jan 1 1999, In : International Journal of Infrared and Millimeter Waves. 20, 8, p. 1593-1617 25 p.

Research output: Contribution to journalArticle

soil pollution
vegetation
remote sensing
Remote sensing
contamination
11 Citations (Scopus)

SAR imaging using a coherent ultrawideband random noise radar

Garmatyuk, D. S. & Narayanan, R. M., 1999, In : Proceedings of SPIE - The International Society for Optical Engineering. 3810, p. 223-230 8 p.

Research output: Contribution to journalArticle

Spurious signal noise
Radar Imaging
Radar imaging
Random Noise
Synthetic Aperture

Simulation study of a robust algorithm for soil moisture and surface roughness estimation using L-band radar backscatter

Narayanan, R. M., Horner, J. R. & St. Germain, K. M., Jan 1 1999, In : Geocarto International. 14, 1, p. 6-13 8 p.

Research output: Contribution to journalArticle

surface roughness
backscatter
soil surface
soil moisture
radar
3 Citations (Scopus)

Simulation study of a robust algorithm for soil moisture and surface roughness estimation using L-Band radar backscatter

Narayanan, R. M., Horner, J. R. & St. Germain, K. M., Jan 1 1999, In : Geocarto International. 14, 1, p. 5-12 8 p.

Research output: Contribution to journalArticle

surface roughness
backscatter
soil surface
soil moisture
radar
20 Citations (Scopus)
research project
graduate
Students
experience
student
1998
114 Citations (Scopus)

Design, performance, and applications of a coherent ultra-wideband random noise radar

Narayanan, R. M., Xu, Y., Hoffmeyer, P. D. & Curtis, J. O., Jan 1 1998, In : Optical Engineering. 37, 6, p. 1855-1869 15 p.

Research output: Contribution to journalArticle

Spurious signal noise
Radar systems
random noise
Ultra-wideband (UWB)
radar
16 Citations (Scopus)

Effects of laboratory procedures on soil electrical property measurements

Curtis, J. & Narayanan, R. M., Dec 1 1998, In : IEEE Transactions on Instrumentation and Measurement. 47, 6, p. 1474-1480 7 p.

Research output: Contribution to journalArticle

soils
Electric properties
electrical properties
Soils
Extrapolation
7 Citations (Scopus)

Effects of laboratory procedures on soil electrical property measurements

Curtis, J. & Narayanan, R. M., Dec 1 1998, In : IEEE Transactions on Instrumentation and Measurement. 47, 6, p. 1469-1473 5 p.

Research output: Contribution to journalArticle

soils
Electric properties
electrical properties
Soils
Extrapolation
Boundary conditions
Scattering
boundary conditions
scattering
sidelobes
1997
2 Citations (Scopus)

A new spatial interferometry capability using the Arecibo 430-MHz radar

Palmer, R. D., Larsen, M. F., Howell, P. B., Cho, J. Y. N., Narayanan, R. M. & Kelley, M. C., Jan 1 1997, In : Radio Science. 32, 2, p. 749-755 7 p.

Research output: Contribution to journalArticle

Observatories
interferometry
Interferometry
radar
Radar
Reflectometers
snow
Snow
Millimeter waves
millimeter waves
5 Citations (Scopus)

Millimeter wave backscatter measurements in support of collision avoidance applications

Narayanan, R. M. & Snuttjer, B. R. J., Jan 1 1997, In : International Journal of Infrared and Millimeter Waves. 18, 11, p. 2077-2109 33 p.

Research output: Contribution to journalArticle

collision avoidance
radar cross sections
Radar cross section
clutter
Collision avoidance

Using ERS-1 data to measure and MAP selected conditions related to the production of methane in a wetland environment: The Nebraska Sandhills, USA

Rundquist, D. C., Leavitt, B. C., Payton, S. L. & Narayanan, R. M., 1997, In : European Space Agency, (Special Publication) ESA SP. 414 PART 1, p. 197-201 5 p.

Research output: Contribution to journalArticle

ERS-1 (ESA satellite)
wetlands
Wetlands
Methane
methane
1996
11 Citations (Scopus)

Millimeter-wave specular and diffuse multipath components of terrain

Narayanan, R. M., Cox, D. D., Ralston, J. M. & Christian, M. R., Dec 1 1996, In : IEEE Transactions on Antennas and Propagation. 44, 5, p. 627-645 19 p.

Research output: Contribution to journalArticle

Millimeter waves
Antennas
Horn antennas
Geometry
Gravel
1994
6 Citations (Scopus)

Field Measurements of Natural and Artificial Targets Using a Mid-Infrared Laser Reflectance Sensor

Narayanan, R. M. & Green, S. E., Jan 1 1994, In : IEEE Photonics Technology Letters. 6, 8, p. 1023-1026 4 p.

Research output: Contribution to journalArticle

Infrared lasers
infrared lasers
reflectance
deciduous trees
sensors
2 Citations (Scopus)

First Order Exponential Approximations for Small Arguments

Narayanan, R. M., Jan 1 1994, In : IEEE Aerospace and Electronic Systems Magazine. 9, 2, p. 33-35 3 p.

Research output: Contribution to journalArticle

antenna
scattering
decomposition
engineering
quotients
11 Citations (Scopus)

Power spectrum of wind-influenced vegetation backscatter at x-band

Narayanan, R. M., Doerr, D. W. & Rundquist, D. C., Apr 1 1994, In : IEE Proceedings: Radar, Sonar and Navigation. 141, 2, p. 125-131 7 p.

Research output: Contribution to journalArticle

Power spectrum
Power spectral density
Radar
Continuous wave radar
Electric delay lines
14 Citations (Scopus)
radar imagery
Soil moisture
bare soil
surface roughness
Radar
1993
3 Citations (Scopus)

Azimuthal Scattering Pattern of Trees at X-Band

Narayanan, R. M., Nelson, S. E. & Dalton, J. P., Jan 1 1993, In : IEEE Transactions on Aerospace and Electronic Systems. 29, 2, p. 588-593 6 p.

Research output: Contribution to journalArticle

Electromagnetic wave scattering
Radar clutter
Radar measurement
Forestry
Backscattering
11 Citations (Scopus)

Mid-infrared laser reflectance of moist soils

Narayanan, R. M., Green, S. E. & Alexander, D. R., Oct 20 1993, In : Applied Optics. 32, 30, p. 6043-6052 10 p.

Research output: Contribution to journalArticle

Infrared lasers
infrared lasers
moisture content
soils
Moisture