Elijah Ramsey, III, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 76
Remote sensing survey of Chinese tallow tree in the Toledo Bend Reservoir area, Louisiana and Texas Remote sensing survey of Chinese tallow tree in the Toledo Bend Reservoir area, Louisiana and Texas
We applied Hyperion sensor satellite data acquired by the National Aeronautics and Space Administration’s Earth Observing-1 (EO-1) satellite in conjunction with reconnaissance surveys to map the occurrences of the invasive Chinese tallow tree (Triadica sebifera) in the Toledo Bend Reservoir study area of northwestern Louisiana and northeastern Texas. The rationale for application of high...
Authors
Elijah W. Ramsey, Amina Rangoonwala, Terri Bannister, Yukihiro Suzuoki
Limitations and potential of satellite imagery to monitor environmental response to coastal flooding Limitations and potential of satellite imagery to monitor environmental response to coastal flooding
Storm-surge flooding and marsh response throughout the coastal wetlands of Louisiana were mapped using several types of remote sensing data collected before and after Hurricanes Gustav and Ike in 2008. These included synthetic aperture radar (SAR) data obtained from the (1) C-band advance SAR (ASAR) aboard the Environmental Satellite, (2) phased-array type L-band SAR (PALSAR) aboard the...
Authors
Elijah W. Ramsey, Dirk Werle, Yukihiro Suzuoki, Amina Rangoonwala, Zhong Lu
Flat-plate techniques for measuring reflectance of macro-algae (Ulva curvata) Flat-plate techniques for measuring reflectance of macro-algae (Ulva curvata)
We tested the consistency and accuracy of flat-plate spectral measurements (400–1000 nm) of the marine macrophyte Ulva curvata. With sequential addition of Ulva thallus layers, the reflectance progressively increased from 6% to 9% with six thalli in the visible (VIS) and from 5% to 19% with ten thalli in the near infrared (NIR). This progressive increase was simulated by a mathematical...
Authors
Elijah W. Ramsey, Amina Rangoonwala, Mads Solgaard Thomsen, Arthur Schwarzschild
Spectral definition of the macro-algae Ulva curvata in the back-barrier bays of the Eastern Shore of Virginia, USA Spectral definition of the macro-algae Ulva curvata in the back-barrier bays of the Eastern Shore of Virginia, USA
We have developed methods to determine the visible (VIS) to near-infrared (NIR) spectral properties of thalli and epiphytes of bloom-forming and green macrophyte Ulva curvata in back-barrier lagoons in Virginia, USA. A 2% increase in NIR thalli reflectance from winter to summer (ca. 9.5%) matched the drop in summer NIR transmittance (ca. 90%). In contrast, summer and winter VIS...
Authors
E. Ramsey, A. Rangoonwalaj, M.S. Thomsen, A. Schwarzschild
Hyperspectral remote sensing of wetland vegetation Hyperspectral remote sensing of wetland vegetation
Wetlands proportionally exert a higher influence on biogeochemical fluxes among the land, the atmosphere, and hydrologic systems than their 1% worldwide occurrence suggests [1]. Although their frequency of occurrence is low and their importance is high, wetlands continue to face high detrimental pressures from natural and human-induced forces [2]. Remote sensing offers the single best...
Authors
Elijah Ramsey III, Amina Rangoonwala
Mapping the Natchez Trace Parkway Mapping the Natchez Trace Parkway
Based on a National Park Service (NPS) landcover classification, a landcover map of the 715-km (444-mile) NPS Natchez Trace Parkway (hereafter referred to as the "Parkway") was created. The NPS landcover classification followed National Vegetation Classification (NVC) protocols. The landcover map, which extended the initial landcover classification to the entire Parkway, was based on...
Authors
Amina Rangoonwala, Terri Bannister, Elijah W. Ramsey
Science and Products
Filter Total Items: 76
Remote sensing survey of Chinese tallow tree in the Toledo Bend Reservoir area, Louisiana and Texas Remote sensing survey of Chinese tallow tree in the Toledo Bend Reservoir area, Louisiana and Texas
We applied Hyperion sensor satellite data acquired by the National Aeronautics and Space Administration’s Earth Observing-1 (EO-1) satellite in conjunction with reconnaissance surveys to map the occurrences of the invasive Chinese tallow tree (Triadica sebifera) in the Toledo Bend Reservoir study area of northwestern Louisiana and northeastern Texas. The rationale for application of high...
Authors
Elijah W. Ramsey, Amina Rangoonwala, Terri Bannister, Yukihiro Suzuoki
Limitations and potential of satellite imagery to monitor environmental response to coastal flooding Limitations and potential of satellite imagery to monitor environmental response to coastal flooding
Storm-surge flooding and marsh response throughout the coastal wetlands of Louisiana were mapped using several types of remote sensing data collected before and after Hurricanes Gustav and Ike in 2008. These included synthetic aperture radar (SAR) data obtained from the (1) C-band advance SAR (ASAR) aboard the Environmental Satellite, (2) phased-array type L-band SAR (PALSAR) aboard the...
Authors
Elijah W. Ramsey, Dirk Werle, Yukihiro Suzuoki, Amina Rangoonwala, Zhong Lu
Flat-plate techniques for measuring reflectance of macro-algae (Ulva curvata) Flat-plate techniques for measuring reflectance of macro-algae (Ulva curvata)
We tested the consistency and accuracy of flat-plate spectral measurements (400–1000 nm) of the marine macrophyte Ulva curvata. With sequential addition of Ulva thallus layers, the reflectance progressively increased from 6% to 9% with six thalli in the visible (VIS) and from 5% to 19% with ten thalli in the near infrared (NIR). This progressive increase was simulated by a mathematical...
Authors
Elijah W. Ramsey, Amina Rangoonwala, Mads Solgaard Thomsen, Arthur Schwarzschild
Spectral definition of the macro-algae Ulva curvata in the back-barrier bays of the Eastern Shore of Virginia, USA Spectral definition of the macro-algae Ulva curvata in the back-barrier bays of the Eastern Shore of Virginia, USA
We have developed methods to determine the visible (VIS) to near-infrared (NIR) spectral properties of thalli and epiphytes of bloom-forming and green macrophyte Ulva curvata in back-barrier lagoons in Virginia, USA. A 2% increase in NIR thalli reflectance from winter to summer (ca. 9.5%) matched the drop in summer NIR transmittance (ca. 90%). In contrast, summer and winter VIS...
Authors
E. Ramsey, A. Rangoonwalaj, M.S. Thomsen, A. Schwarzschild
Hyperspectral remote sensing of wetland vegetation Hyperspectral remote sensing of wetland vegetation
Wetlands proportionally exert a higher influence on biogeochemical fluxes among the land, the atmosphere, and hydrologic systems than their 1% worldwide occurrence suggests [1]. Although their frequency of occurrence is low and their importance is high, wetlands continue to face high detrimental pressures from natural and human-induced forces [2]. Remote sensing offers the single best...
Authors
Elijah Ramsey III, Amina Rangoonwala
Mapping the Natchez Trace Parkway Mapping the Natchez Trace Parkway
Based on a National Park Service (NPS) landcover classification, a landcover map of the 715-km (444-mile) NPS Natchez Trace Parkway (hereafter referred to as the "Parkway") was created. The NPS landcover classification followed National Vegetation Classification (NVC) protocols. The landcover map, which extended the initial landcover classification to the entire Parkway, was based on...
Authors
Amina Rangoonwala, Terri Bannister, Elijah W. Ramsey