&lt;title&gt;Temporal measurement and analysis of high-resolution spectral signatures of plants and relationships to biophysical characteristics&lt;/title&gt;

Bostater, Charles R.; Rebbman, Jan; Hall, Carlton R.; Provancha, Mark J.; Vieglais, Dave

doi:10.1117/12.227193

Cited by 9 publications

(8 citation statements)

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“…Successful algorithm development for feature characterization requires development of a quantitative understanding of complex interactions that occur between photons and the numerous absorbing and scattering components of targets (Bostater et al 1994, Asner 1998. For plants, these wavelength dependent interactions involve tissue optical properties, canopy biophysical attributes, bottom reflectance (soil and litter), and illumination characteristics.…”

Section: Resultsmentioning

confidence: 99%

“…A simple correlation analyses was run between the spectral reflectance data and the percent moisture to define first order relationships between reflectance values and leaf moisture. To assess possible relationships between leaf percent moisture and spectral curvature or inflection a three band inflection ratio (Grew 1980;Bostater et al 1994) was computed. Spectral smoothing was utilized to reduce influences of noise and maximize the signal (Demetriades-Shah et al 1990).…”

Section: Methodsmentioning

confidence: 99%

“…The determination of biomass, water status, photosynthetic rates, chemical concentrations, and biophysical features of vegetation are recognized as important objectives for remote sensing in agriculture, terrestrial ecology, and earth system science. Water-stressed plants are expected to exhibit a decrease in photosynthesis and conductance white experiencing an increase in fluorescence at high tight intensities and previous studies have shown that remote sensing techniques were useful for characterizing water status of scrub oak leaves (Bostater et al 1994) …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Examining Dehydration and Hypoxic Stress in Wheat Plants Using a Porous Tube Plant Nutrient Delivery System Developed for Microgravity

Dreschel¹,

Hall²,

Foster³

et al. 2005

SAE Technical Paper Series

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The Porous Tube Plant Nutrient Delivery System (PTPNDS) was designed for NASA to grow plants in microgravity of space. The system utilizes a controlled fluid loop to supply nutrients and water to plant roots growing on a ceramic surface moistened by capiflary action. A PTPNDS test bed was developed and utilizing remote sensing systems, spectral analyses procedures, gas-exchange, and fluorescence measurements, we examined differences in plant water status for wheat plants (Triticum aestivum, cv. Pengee) grown in a modified growth chamber during the summers of 2003 and 2004. Some differences in plant performance were detectable in the gas-exchange and fluorescence measurements. For instance, in both years the plants grown with the most available water had the lowest rates of photosynthesis and exhibited higher proportions of non-photochemical quenching particularly under low light levels. In addition, small differences in mean leaf water content between treatments were detected using spectral reflectance analyses.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Examining Dehydration and Hypoxic Stress in Wheat Plants Using a Porous Tube Plant Nutrient Delivery System Developed for Microgravity

Dreschel¹,

Hall²,

Foster³

et al. 2005

SAE Technical Paper Series

View full text Add to dashboard Cite

show abstract

“…Efforts to restore habitat endangered flora and fauna utilize non-destructive tools to provide spatial and temporal data for decision making. Remote sensing has been the fundamental tool used in determining some of the biophysical and biochemical variables for monitoring and research [5]. Use of airborne and satellite remote sensing works well in detecting bio-chemical, bio-physical attributes at the leaf and canopy level.…”

Section: Introductionmentioning

confidence: 99%

Use of ground penetrating radar for determination of water table depth and subsurface soil characteristics at Kennedy Space Center

Hengari¹,

Hall²,

Kozusko³

et al. 2013

Earth Resources and Environmental Remote Sensing/Gis Applications IV

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Sustainable use and management of natural resources require strategic responses using non-destructive tools to provide spatial and temporal data for decision making. Experiments conducted at John F. Kennedy Space Center (KSC) demonstrate ground penetrating radar (GPR) can provide high-resolution images showing depth to water tables. GPR data at KSC were acquired using a MALÅ Rough Terrain 100 MHz Antenna. Data indicate strong correlation (R 2 =0.80) between measured water table depth (shallow monitoring wells and soil auger) and GPR estimated depth. The study demonstrated the use of GPR to detect Holocene and Pleistocene depositional environments such as Anastasia Formation that consists of admixtures of sand, shell and coquinoid limestone at a depth of 20-25 ft. This corresponds well with the relatively strong reflections from 7.5 to 13 m (125-215 ns) in GPR images. Interpretations derived from radar data coupled with other non-GPR data (wells data and soil auger data) will aid in the understanding of climate change impacts due to sea level rise on the scrub vegetation composition at KSC. Climate change is believed to have a potentially significant impact potential on near coastal ground water levels and associated water table depth. Understanding the impacts of ground water levels changes will, in turn, lead to improved conceptual conservation efforts and identifications of climate change adaptation concepts related to the recovery of the Florida scrub jay (Aphelocoma coerulescens) and other endangered or threatened species which are directly dependent on a healthy near coastal scrub habitat. Transfer of this inexpensive and non-destructive technology to other areas at KSC, Florida, and to other countries, may prove useful in the development of future conservation programs.

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“…[4][5][6] Leaf water status was tested using spectral data. 1,7,8 Brightness spectral coefficients were used to test plant stresses and to evaluate photosynthesis. 9…”

Section: Introductionmentioning

confidence: 99%

New adaptive methods for sensing of chemical components and biological agents

2004

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It is known that leaf reflectance spectra can be used to estimate the contents of chemical components in vegetation. Recent novel applications include the detection of harmful biological agents that can originate from agricultural bioterrorism attacks. Such attacks have been identified as a major threat to the United States' agriculture. Nevertheless, the usefulness of such approach is currently limited by distorting factors, in particular soil reflectance.The quantitative analysis of the spectral curves from the reflection of plant leaves may be the basis for the development of new methods for interpreting the data obtained by the remote measurement of plants. We consider the problem of characterizing the chemical composition from noisy spectral data using an experimental optical method.Using our experience in signal processing and optimization of complex systems we propose a new mathematical model for sensing of chemical components in vegetation. Estimates are defined as minimizers of penalized cost functionals with sequential quadratic programming (SQR) methods. A deviation measure used in risk analysis is also considered. This framework is demonstrated for different agricultural plants using adaptive filtration, principal components analysis, and optimization techniques for classification of spectral curves of chemical components. Various estimation problems will be considered to illustrate the computational aspects of the proposed method.

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<title>Temporal measurement and analysis of high-resolution spectral signatures of plants and relationships to biophysical characteristics</title>

Cited by 9 publications

References 0 publications

Examining Dehydration and Hypoxic Stress in Wheat Plants Using a Porous Tube Plant Nutrient Delivery System Developed for Microgravity

Examining Dehydration and Hypoxic Stress in Wheat Plants Using a Porous Tube Plant Nutrient Delivery System Developed for Microgravity

Use of ground penetrating radar for determination of water table depth and subsurface soil characteristics at Kennedy Space Center

New adaptive methods for sensing of chemical components and biological agents

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