東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Development of a Multimode Instrumen...

Salazar, Sean Elliott.

Linked to FindBook

Google Book

Amazon

博客來

Development of a Multimode Instrument for Remote Measurements of Unsaturated Soil Properties.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Development of a Multimode Instrument for Remote Measurements of Unsaturated Soil Properties./
Author:	Salazar, Sean Elliott.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
Description:	191 p.
Notes:	Source: Dissertations Abstracts International, Volume: 81-05, Section: B.
Contained By:	Dissertations Abstracts International81-05B.
Subject:	Civil engineering. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=22589611
ISBN:	9781088373064

Development of a Multimode Instrument for Remote Measurements of Unsaturated Soil Properties.
Salazar, Sean Elliott.

Development of a Multimode Instrument for Remote Measurements of Unsaturated Soil Properties. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 191 p.

Source: Dissertations Abstracts International, Volume: 81-05, Section: B.

Thesis (Ph.D.)--University of Arkansas, 2019.

This item must not be sold to any third party vendors.

The hydromechanical behavior of soil is governed by parameters that include the moisture content, soil matric potential, texture, and the mineralogical composition of the soil. Remote characterization of these and other key properties of the soil offers advantages over conventional in situ or laboratory-based measurements: information may be acquired rapidly over large, or inaccessible areas; samples do not need to be collected; and the measurements are non-destructive. A field-deployable, ground-based remote sensor, designated the Soil Observation Laser Absorption Spectrometer (SOLAS), was developed to infer parameters of bare soils and other natural surfaces over intermediate (100 m) and long (1,000 m) ranges. The SOLAS methodology combines hyperspectral remote sensing with differential absorption and laser ranging measurements. A transmitter propagates coherent, near-infrared light at on-line (823.20 nm) and off-line (847.00 nm) wavelengths. Backscattered light is received through a 203-mm diameter telescope aperture and is divided into two channels to enable simultaneous measurements of spectral reflectance, differential absorption, and range to the target. The spectral reflectance is measured on 2151 continuous bands that range from visible (380 nm) to shortwave infrared (2500 nm) wavelengths. A pair of photodetectors receive the laser backscatter in the 820-850 nm range. Atmospheric water vapor is inferred using a differential absorption technique in conjunction with an avalanche photodetector, while range to the target is based on a frequency-modulated, self-chirped, homodyne detection scheme. The design, fabrication, and testing of the SOLAS is described herein. The receiver was optimized for the desired backscatter measurements and assessed through a series of trials that were conducted in both indoor and outdoor settings. Spectral reflectance measurements collected at proximal range compared well with measurements collected at intermediate ranges, demonstrating the utility of the receiver. Additionally, the noise characteristics of the spectral measurements were determined across the full range of the detected wavelengths. Continued development of the SOLAS instrument will enable range-resolved and water vapor-corrected reflectance measurements over longer ranges. Anticipated applications for the SOLAS technology include rapid monitoring of earth construction projects, geohazard assessment, or ground-thruthing for current and future satellite-based multi- and hyperspectral data.

ISBN: 9781088373064Subjects--Topical Terms:

860360
Civil engineering.

Development of a Multimode Instrument for Remote Measurements of Unsaturated Soil Properties.
LDR:03528nmm a2200301 4500 001 2263274
005 20200214113228.5
008 220629s2019 ||||||||||||||||| ||eng d
020 $a 9781088373064
035 $a (MiAaPQ)AAI22589611
035 $a AAI22589611
040 $a MiAaPQ $c MiAaPQ
100 1 $a Salazar, Sean Elliott. $3 3540361
245 1 0 $a Development of a Multimode Instrument for Remote Measurements of Unsaturated Soil Properties.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2019
300 $a 191 p.
500 $a Source: Dissertations Abstracts International, Volume: 81-05, Section: B.
500 $a Advisor: Coffman, Richard.
502 $a Thesis (Ph.D.)--University of Arkansas, 2019.
506 $a This item must not be sold to any third party vendors.
520 $a The hydromechanical behavior of soil is governed by parameters that include the moisture content, soil matric potential, texture, and the mineralogical composition of the soil. Remote characterization of these and other key properties of the soil offers advantages over conventional in situ or laboratory-based measurements: information may be acquired rapidly over large, or inaccessible areas; samples do not need to be collected; and the measurements are non-destructive. A field-deployable, ground-based remote sensor, designated the Soil Observation Laser Absorption Spectrometer (SOLAS), was developed to infer parameters of bare soils and other natural surfaces over intermediate (100 m) and long (1,000 m) ranges. The SOLAS methodology combines hyperspectral remote sensing with differential absorption and laser ranging measurements. A transmitter propagates coherent, near-infrared light at on-line (823.20 nm) and off-line (847.00 nm) wavelengths. Backscattered light is received through a 203-mm diameter telescope aperture and is divided into two channels to enable simultaneous measurements of spectral reflectance, differential absorption, and range to the target. The spectral reflectance is measured on 2151 continuous bands that range from visible (380 nm) to shortwave infrared (2500 nm) wavelengths. A pair of photodetectors receive the laser backscatter in the 820-850 nm range. Atmospheric water vapor is inferred using a differential absorption technique in conjunction with an avalanche photodetector, while range to the target is based on a frequency-modulated, self-chirped, homodyne detection scheme. The design, fabrication, and testing of the SOLAS is described herein. The receiver was optimized for the desired backscatter measurements and assessed through a series of trials that were conducted in both indoor and outdoor settings. Spectral reflectance measurements collected at proximal range compared well with measurements collected at intermediate ranges, demonstrating the utility of the receiver. Additionally, the noise characteristics of the spectral measurements were determined across the full range of the detected wavelengths. Continued development of the SOLAS instrument will enable range-resolved and water vapor-corrected reflectance measurements over longer ranges. Anticipated applications for the SOLAS technology include rapid monitoring of earth construction projects, geohazard assessment, or ground-thruthing for current and future satellite-based multi- and hyperspectral data.
590 $a School code: 0011.
650 4 $a Civil engineering. $3 860360
650 4 $a Soil sciences. $3 2122699
690 $a 0543
690 $a 0481
710 2 $a University of Arkansas. $b Civil Engineering. $3 2094097
773 0 $t Dissertations Abstracts International $g 81-05B.
790 $a 0011
791 $a Ph.D.
792 $a 2019
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=22589611