Search Results - "Campbell, Petya K."

Diurnal and Seasonal Variations in Chlorophyll Fluorescence Associated with Photosynthesis at Leaf and Canopy Scales by Campbell, Petya K., Huemmrich, Karl F., Middleton, Elizabeth M., Ward, Lauren A., Julitta, Tommaso, Daughtry, Craig S. T., Burkart, Andreas, Russ, Andrew L., Kustas, William P.

“…There is a critical need for sensitive remote sensing approaches to monitor the parameters governing photosynthesis, at the temporal scales relevant to their…”
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Unraveling the physical and physiological basis for the solar- induced chlorophyll fluorescence and photosynthesis relationship using continuous leaf and canopy measurements of a corn crop by Yang, Peiqi, van der Tol, Christiaan, Campbell, Petya K. E, Middleton, Elizabeth M

“…Estimates of the gross terrestrial carbon uptake exhibit large uncertainties. Sun-induced chlorophyll fluorescence (SIF) has an apparent near-linear…”
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Integrating Solar Induced Fluorescence and the Photochemical Reflectance Index for Estimating Gross Primary Production in a Cornfield by Cheng, Yen-Ben, Middleton, Elizabeth M, Zhang, Qingyuan, Huemmrich, Karl F, Campbell, Petya K. E, Corp, Lawrence A, Cook, Bruce D, Kustas, William P, Daughtry, Craig S

“…The utilization of remotely sensed observations for light use efficiency (LUE) and tower-based gross primary production (GPP) estimates was studied in a USDA…”
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Estimating major ion and nutrient concentrations in mangrove estuaries in Everglades National Park using leaf and satellite reflectance by Lagomasino, David, Price, René M., Whitman, Dean, Campbell, Petya K.E., Melesse, Assefa

“…Coastal mangrove ecosystems are under duress worldwide because of urban development, sea-level rise, and climate change, processes that are capable of changing…”
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EO-1 data quality and sensor stability with changing orbital precession at the end of a 16 year mission by Franks, Shannon, Neigh, Christopher S R, Campbell, Petya K, Sun, Guoqing, Yao, Tian, Zhang, Qingyuan, Huemmrich, Karl F, Middleton, Elizabeth M, Ungar, Stephen G, Frye, Stuart W

“…The Earth Observing One (EO-1) satellite has completed 16 years of Earth observations in early 2017. What started as a technology mission to test various new…”
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Fluorescence Correction Vegetation Index (FCVI): A physically based reflectance index to separate physiological and non-physiological information in far-red sun-induced chlorophyll fluorescence by Yang, Peiqi, van der Tol, Christiaan, Campbell, Petya K.E., Middleton, Elizabeth M.

“…Sun-induced chlorophyll fluorescence (SIF) has been used to track vegetation photosynthetic activity for improving estimation of gross primary productivity…”
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Variability of sun‐induced chlorophyll fluorescence according to stand age‐related processes in a managed loblolly pine forest by Colombo, Roberto, Celesti, Marco, Bianchi, Remo, Campbell, Petya K. E., Cogliati, Sergio, Cook, Bruce D., Corp, Lawrence A., Damm, Alexander, Domec, Jean‐Christophe, Guanter, Luis, Julitta, Tommaso, Middleton, Elizabeth M., Noormets, Asko, Panigada, Cinzia, Pinto, Francisco, Rascher, Uwe, Rossini, Micol, Schickling, Anke

“…Leaf fluorescence can be used to track plant development and stress, and is considered the most direct measurement of photosynthetic activity available from…”
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Remote Sensing of Tundra Ecosystems Using High Spectral Resolution Reflectance: Opportunities and Challenges by Nelson, Peter R., Maguire, Andrew J., Pierrat, Zoe, Orcutt, Erica L., Yang, Dedi, Serbin, Shawn, Frost, Gerald V., Macander, Matthew J., Magney, Troy S., Thompson, David R., Wang, Jonathan A., Oberbauer, Steven F., Zesati, Sergio Vargas, Davidson, Scott J., Epstein, Howard E., Unger, Steven, Campbell, Petya K. E., Carmon, Nimrod, Velez‐Reyes, Miguel, Huemmrich, K. Fred

“…Observing the environment in the vast regions of Earth through remote sensing platforms provides the tools to measure ecological dynamics. The Arctic tundra…”
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The 2013 FLEX-US Airborne Campaign at the Parker Tract Loblolly Pine Plantation in North Carolina, USA by Middleton, Elizabeth M., Rascher, Uwe, Corp, Lawrence A., Huemmrich, K. Fred, Cook, Bruce D., Noormets, Asko, Schickling, Anke, Pinto, Francisco, Alonso, Luis, Damm, Alexander, Guanter, Luis, Colombo, Roberto, Campbell, Petya K. E., Landis, David R., Zhang, Qingyuan, Rossini, Micol, Schuettemeyer, Dirk, Bianchi, Remo

“…The first European Space Agency (ESA) and NASA collaboration in an airborne campaign to support ESA's FLuorescence EXplorer (FLEX) mission was conducted in…”
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ISS as a Platform for Optical Remote Sensing of Ecosystem Carbon Fluxes: A Case Study Using HICO by Huemmrich, Karl Fred, Campbell, Petya K. Entcheva, Gao, Bo-Cai, Flanagan, Larry B., Goulden, Michael

“…Data from the hyperspectral imager for coastal ocean (HICO), mounted on the International Space Station (ISS), were used to develop and test algorithms for…”
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Monitoring Orbital Precession of EO-1 Hyperion With Three Atmospheric Correction Models in the Libya-4 PICS by Neigh, Christopher S. R., McCorkel, Joel, Campbell, Petya K. E., Ong, Lawrence, Ly, Vuong, Landis, David, Middleton, Elizabeth M.

“…Spaceborne spectrometers require spectral-temporal stability characterization to aid in validation of derived data products. Earth Observation 1 (EO-1) began…”
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Arctic Tundra Vegetation Functional Types Based on Photosynthetic Physiology and Optical Properties by Huemmrich, Karl Fred, Gamon, John A., Tweedie, Craig E., Campbell, Petya K. Entcheva, Landis, David R., Middleton

“…Non-vascular plants (lichens and mosses) are significant components of tundra landscapes and may respond to climate change differently from vascular plants…”
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Fluorescence sensing techniques for vegetation assessment by Corp, Lawrence A, Middleton, Elizabeth M, McMurtrey, James E, Campbell, Petya K Entcheva, Butcher, L Maryn

“…Active fluorescence (F) sensing systems have long been suggested as a means to identify species composition and determine physiological status of plants…”
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EO-1 Hyperion Reflectance Time Series at Calibration and Validation Sites: Stability and Sensitivity to Seasonal Dynamics by Campbell, Petya K. Entcheva, Middleton, Elizabeth M., Thome, Kurt J., Kokaly, Raymond F., Huemmrich, Karl Fred, Lagomasino, David, Novick, Kimberly A., Brunsell, Nathaniel A.

“…This study evaluated Earth Observing 1 (EO-1) Hyperion reflectance time series at established calibration sites to assess the instrument stability and…”
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Utilizing in situ directional hyperspectral measurements to validate bio-indicator simulations for a corn crop canopy by Cheng, Yen-Ben, Middleton, Elizabeth M., Huemmrich, Karl F., Zhang, Qingyuan, Campbell, Petya K.E., Corp, Lawrence A., Russ, Andrew L., Kustas, William P.

“…Two radiative transfer canopy models, SAIL and the two-layer Markov-Chain Canopy Reflectance Model (MCRM), were coupled with in situ leaf optical properties to…”
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Towards a standardized, ground-based network of hyperspectral measurements: Combining time series from autonomous field spectrometers with Sentinel-2 by Naethe, Paul, De Sanctis, Andrea, Burkart, Andreas, Campbell, Petya K.E., Colombo, Roberto, Di Mauro, Biagio, Damm, Alexander, El-Madany, Tarek, Fava, Francesco, Gamon, John A., Huemmrich, Karl F., Migliavacca, Mirco, Paul-Limoges, Eugenie, Rascher, Uwe, Rossini, Micol, Schüttemeyer, Dirk, Tagliabue, Giulia, Zhang, Yongguang, Julitta, Tommaso

“…Sentinel-2 satellite data enables multispectral monitoring of the earth at a high temporal revisit rate. Combining this information with a network of optical…”
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Remote Sensing of Tundra Ecosystems Using High Spectral Resolution Reflectance: Opportunities and Challenges by Nelson, Peter R., Maguire, Andrew J., Pierrat, Zoe, Orcutt, Erica L., Yang, Dedi, Serbin, Shawn, Frost, Gerald V., Macander, Matthew J., Magney, Troy S., Thompson, David R., Wang, Jonathan A., Oberbauer, Steven F., Zesati, Sergio Vargas, Davidson, Scott J., Epstein, Howard E., Unger, Steven, Campbell, Petya K. E., Carmon, Nimrod, Velez‐Reyes, Miguel, Huemmrich, K. Fred

“…Abstract Observing the environment in the vast regions of Earth through remote sensing platforms provides the tools to measure ecological dynamics. The Arctic…”
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Forecasting corn yield with imaging spectroscopy by Corp, Lawrence A, Middleton, Elizabeth M, Daughtry, Craig S T, Russ, Andrew L, Campbell, Petya K E, Huemmrich, K Fred, Yen-Ben Cheng

“…Corn is the most widely produced grain in the United States with 87 million acres planted in 2009 accounting for more than 90 percent of total value and…”
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Ground-Based Measurements and Validation Protocols for Flex by Middleton, Elizabeth M., Huemmrich, K. Fred, Campbell, Petya K.E., Zhany, Oinsyuan, Landis, David R., Garrish, Cris, Ong, Lawrence, Daughiry, Craig

“…The upcoming ESA Fluorescence Explorer (FLEX) mission will incorporate ground-based validations for fluorescence parameters and reflectance indices, drawing on…”
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Hyperion: The first global orbital spectrometer, earth observing-1 (EO-1) satellite (2000-2017) by Middleton, Elizabeth M., Campbell, Petya K. E., Ong, Lawrence, Landis, David R., Qingyuan Zhang, Neigh, Christopher S., Huemmrich, K. Fred, Ungar, Stephen G., Mandl, Daniel J., Frye, Stuart W., Ly, Vuong T., Cappelaere, Patrice G., Chien, Steve A., Franks, Shannon, Pollack, Nathan H.

“…In February 2017, the Earth Observing One (EO-1) satellite mission successfully completed sixteen years and three months of Earth imaging by its two unique…”
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