Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 22 for “"Remote sensing technique"”.
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Monitoring Regional Vegetation Changes in Seward Peninsula, Alaska, Using Remote Sensing Technique
Arctic vegetation has been undergoing various transitions depending on its regional characteristics and numerous contributors to these changes include direct human impact and natural changes in the earth’s climate system. The commonest causes of the vegetation change over a large arctic area are …
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Reflectance spectroscopy as a remote sensing technique for the identification of porphyry copper deposits.
Thesis. 1978. Ph.D.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Science.
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Derivation of Trace Gas Information combining Differential Optical Absorption Spectroscopy with Radiative Transfer Modelling
… Absorption Spectroscopy (DOAS) is an established remote sensing technique for atmospheric constituent probing. To derive quantitative distribution data of trace gas distributions it is necessary to combine novel measurement techniques like Multi-Axis DOAS with realistic radiative transfer …
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Three applications of satellite borne repeat pass SAR interferometry in Southern Africa
… Rada Interferometry (InSAR) is a relatively new remote sensing technique, which can be used to derive precise topographic height change information over large areas. It is a technique which has been used in a great variety of situations, from the topographic mapping of Venus to the detection of …
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Design And Development Of An Autonomous Radar Receiver For The Detection Of Ultra High Energy Cosmic Rays
… or anisotropy studies, means that new techniques that reduce manpower and financial resources are continually being sought. In this dissertation, the development of a remote sensing technique based observatory known as bistatic radar, which aims to achieve extensive coverage of the …
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Investigating Elevated Aqua Modis Aerosol Optical Depth Retrievals Over The Mid-Latitude Southern Oceans
… some satellite aerosol products based on passive remote sensing methods, is not seen in the CALIOP aerosol product based on an active remote sensing technique with an enhanced cloud detection capability and is not detected from ground-based observations such as MAN and AERONET data. The apparent …
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A stabilized master laser system for differential absorption LIDAR.
… using a passive 16 GHz bandpass filter. This technique can be expanded to stabilize any number of reference lasers with respect to each other and to an absolute optical standard. The prototype DIAL uses a Tapered optical Amplifier (TA) to form 1 μs 500 mW optical pulses with a repetition rate …
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Infrasound as upper atmospheric monitor
… we revisit the use of infrasound as a passive remote sensing technique for the upper atmosphere. Signals from the Tungurahua volcano in Ecuador are used to investigate the behavior of the upper atmosphere. Depending on the atmospheric conditions, stratospheric, mesospheric and thermospheric …
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Infrared spectroscopy of volcanic gases at Masaya, Nicaragua
… was investigated using the new ground-based remote sensing technique of open-path Fourier transform infrared spectroscopy. This technique meets criteria for safe and accurate quantitative characterisation of volcanic gases and on a temporal resolution previously impracticable. Flexibility of …
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Soil Salinity Study in Northern Great Plains Sodium Affected Soil
… in undisturbed soil columns and to develop a remote sensing technique to characterize salinization in South Dakota soils. Fortyeight undisturbed soil columns (30 cm x 15 cm) collected from White Lake, Redfield, and Pierpont were used to assess the chemical remediation strategies. In this study …
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Neotectonics Study Along The Frontal Thrust System Of The Fold-Thrust Belt Of Northwest Himalayas, Pakistan
Developments in geodetic techniques such as Interferometric Synthetic Aperture Radar (InSAR) and the launch of new satellite missions with high spatial and temporal coverage have significantly improved our understanding of the geologic and anthropogenic processes, which include but are not limited …
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Investigation of Radar Interferometric Techniques With Application to the Atmosphere
In this thesis various radar interferometric techniques for studying the atmosphere are investigated. The Radar interferometric imaging (RII) technique is a powerful remote sensing technique for the visualization and investigation of the cross-field dynamics of ionospheric plasma irregularity …
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Evaluating the Performance of the Resampled nSight-2 Sensor's Spectral Configuration in Discriminating Wetland Plant Species Using Advanced Classifiers and Spectroscopy.
… Sustainable Development Goals. Therefore, remote sensing technique has gained prominence in providing such information. However, broadband sensors are affected by effects of soil and water reflectances associated with wetlands hence cannot adequately discern subtle differences among wetland …
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Physics Guided Machine Learning algorithm for MAX-DOAS retrieval
… Absorption Spectroscopy (MAX-DOAS) is a passive remote sensing technique that has been widely used to derive aerosol extinction coefficient profiles and trace gas concentrations. The ill-posed nature of the MAX-DOAS inversion problem makes it almost impossible to design an inversion algorithm …
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Remote Sensing of the Lower Atmosphere: From Surface Concentration to Mixing Layer Height
… Optical Absorption Spectroscopy (DOAS) is a remote sensing technique to detect different trace gas concentrations in the atmosphere. The Multi Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) measurements by the Pandora instrument scan the sky at different elevation angles and …
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Retrieval of trace gases vertical profile in the lower atmosphere combining. Differential Optical Absorption Spectroscopy with radiative transfer models
… and ozone (O3) in the lower troposphere from remote sensing measurements. The remote sensing technique used, referred to as Multiple AXis Differential Optical Absorption Spectroscopy (MAX-DOAS), is a recent technique that represents a significant advance on the well-established DOAS, …
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Tracking urban growth and composition along the western portion of the U.S. - Mexico border: 1985 -2010
… 1985 - 2010 through three chapters. First, the remote sensing technique Multiple Endmember Spectral Mixture Analysis (MESMA) was used with spatial metrics to compare relative quantities of vegetation, impervious surface and soil, between eight cities along the western portion of the …
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Detection and Analysis of Coherent Structures within and above Tall-vegetated Canopies
… eddy covariance and relaxed eddy accumulation techniques. Data were mainly obtained using tower-based single-point turbulence measurements and acoustic remote sensing technique (Sodar-Rass) during extensive field campaigns conducted in summer 2003. The developed wavelet software tool for …
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Development of techniques for detection and dissolution enhancement of mineral deposits in petroleum pipelines using ultrasound.
… some of the above problems using ultrasonic techniques. Work presented in this thesis branches out into two main areas of interest, namely: (a) developments concerning location of deposits from both top-side and down-hole locations; and (b) developments relating to enhancement of scale …
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