Search Results - "O’Neill, P. E."

Effects of corn on C- and L-band radar backscatter: A correction method for soil moisture retrieval by Joseph, A.T., van der Velde, R., O'Neill, P.E., Lang, R., Gish, T.

“…This paper discusses the effects of vegetation on C- (4.75 GHz) and L- (1.6 GHz) band backscattering ( σ o) measured throughout a growth cycle at incidence…”
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Technical Note: Calibration and validation of geophysical observation models by Salama, M. S., Van der Velde, R., van der Woerd, H. J., Kromkamp, J. C., Philippart, C. J. M., Joseph, A. T., O'Neill, P. E., Lang, R. H., Gish, T., Werdell, P. J., Su, Z.

“…We present a method to calibrate and validate observational models that interrelate remotely sensed energy fluxes to geophysical variables of land and water…”
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Evaluating soil moisture retrievals from ESA's SMOS and NASA's SMAP brightness temperature datasets by Al-Yaari, A., Wigneron, J.-P., Kerr, Y., Rodriguez-Fernandez, N., O'Neill, P.E., Jackson, T.J., De Lannoy, G.J.M., Al Bitar, A., Mialon, A., Richaume, P., Walker, J.P., Mahmoodi, A., Yueh, S.

“…Two satellites are currently monitoring surface soil moisture (SM) using L-band observations: SMOS (Soil Moisture and Ocean Salinity), a joint ESA (European…”
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Partitioning evapotranspiration in semiarid grassland and shrubland ecosystems using time series of soil surface temperature by Moran, M.S., Scott, R.L., Keefer, T.O., Emmerich, W.E., Hernandez, M., Nearing, G.S., Paige, G.B., Cosh, M.H., O’Neill, P.E.

“…Information about the ratio of transpiration ( T) to total evapotranspiration ( T/ET) is related to critical global change concerns, including shrub…”
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Using a modeling approach to predict soil hydraulic properties from passive microwave measurements by Burke, E.J., Gurney, R.J., Simmonds, L.P., O'Neill, P.E.

“…A soil water and energy budget model coupled with a microwave emission model (MICRO-SWEAT) was used to predict the diurnal courses of soil surface water…”
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HIGH-RESOLUTION ENHANCED PRODUCT BASED ON SMAP ACTIVE-PASSIVE APPROACH USING SENTINEL 1A AND 1B SAR DATA by Das, N. N., Entekhabi, D., Kim, S., Jagdhuber, T., Dunbar, S., Yueh, S., O’Neill, P. E., Colliander, A., Walker, J., Jackson, T. J.

“…SMAP project released a new enhanced high-resolution (3km) soil moisture active-passive product. This product is obtained by combining the SMAP radiometer data…”
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Hydrosphere State (Hydros) Satellite Mission: An Earth System Pathfinder for Global Mapping of Soil Moisture and Land Freeze/Thaw by Entekhabi, Dara, Njoku, Eni G, Houser, Paul, Spencer, Michael, Doiron, Terence, Kim, Yunjin, Smith, Joel, Girard, Ralph, Belair, Stephane, Crow, Wade, Jackson, Thomas J, Kerr, Yann H, Kimball, John S, Koster, Randy, McDonald, Kyle C, O’Neill, Peggy E, Pultz, Terry, Running, Steve W, Shi, Jiancheng, Wood, E, Van Zyl, J

“…The Hydrosphere State Mission (Hydros) is a pathfinder mission in the National Aeronautics and Space Administration (NASA) Earth System Science Pathfinder…”
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The characterization of water in peat by McBrierty, V.J. (Trinity College, Dublin, Ireland.), Wardell, G.E, Keely, C.M, O'Neill, E.P, Prasad, M

“…The functionality and ultimate use of peat are intimately bound up with the way in which absorbed water behaves in the host matrix. Control of the amount of…”
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parameterized surface reflectivity model and estimation of bare-surface soil moisture with L-band radiometer by Shi, Jiancheng, Chen, K. S, Li, Qin, Jackson, Thomas J, O'Neill, Peggy E, Tsang, Leung

“…Soil moisture is an important parameter for hydrological and climatic investigations. Future satellite missions with L-band passive microwave radiometers will…”
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Observing System Simulation Experiment for Hydros Radiometer-Only Soil Moisture Products by Crow, Wade T, Chan, Steven Tsz K, Entekhabi, Dara, Houser, Paul R, Hsu, Ann Y, Jackson, Thomas J, Njoku, Eni G, O'Neill, Peggy E, Shi, Jiancheng, Zhan, Xiwu

“…Based on 1-km land surface model geophysical predictions within the United States Southern Great Plains (Red-Arkansas River basin), an observing system…”
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Estimation of bare surface soil moisture and surface roughness parameter using L-band SAR image data by Jiancheng Shi, Wang, J., Hsu, A.Y., O'Neill, P.E., Engman, E.T.

“…An algorithm based on a fit of the single-scattering integral equation method (IEM) was developed to provide estimation of soil moisture and surface roughness…”
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Soil moisture and rainfall estimation over a semiarid environment with the ESTAR microwave radiometer by Jackson, T.J., Le Vine, D.M., Griffis, A.J., Goodrich, D.C., Schmugge, T.J., Swift, C.T., O'Neill, P.E.

“…The application of an airborne electronically steered thinned array L-band radiometer (ESTAR) for soil moisture mapping was investigated over the semiarid…”
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Soil water infiltration observation with microwave radiometers by Jackson, T.J., Schmugge, T.J., O'Neill, P.E., Parlange, M.B.

“…Experiments were conducted using truck-based microwave radiometers operating at 1.41- (L-band) and 2.65-GHz (S-band) horizontal polarization to observe small…”
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Observations of coherent emissions from soils by Schmugge, T. J., Jackson, T. J., O'Neill, P. E., Parlange, M. B.

“…Observations of the microwave emissions at 1.413 GHz (L band) and 2.65 GHz (S band) from a silt loam soil exhibited an oscillatory behavior in time as the soil…”
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Validation of SMAP surface soil moisture products with core validation sites by Colliander, A., Jackson, T.J., Bindlish, R., Chan, S., Das, N., Kim, S.B., Cosh, M.H., Dunbar, R.S., Dang, L., Pashaian, L., Asanuma, J., Aida, K., Berg, A., Rowlandson, T., Bosch, D., Caldwell, T., Caylor, K., Goodrich, D., al Jassar, H., Lopez-Baeza, E., Martínez-Fernández, J., González-Zamora, A., Livingston, S., McNairn, H., Pacheco, A., Moghaddam, M., Montzka, C., Notarnicola, C., Niedrist, G., Pellarin, T., Prueger, J., Pulliainen, J., Rautiainen, K., Ramos, J., Seyfried, M., Starks, P., Su, Z., Zeng, Y., van der Velde, R., Thibeault, M., Dorigo, W., Vreugdenhil, M., Walker, J.P., Wu, X., Monerris, A., O'Neill, P.E., Entekhabi, D., Njoku, E.G., Yueh, S.

“…The NASA Soil Moisture Active Passive (SMAP) mission has utilized a set of core validation sites as the primary methodology in assessing the soil moisture…”
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The European Union and Migration: Security versus Identity? by O'Neill, P. E.

“…The Copenhagen School has encapsulated the new security thinking into a comprehensive framework for security analysis. O'Neill uses the Copenhagen School…”
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High Resolution Soil Moisture Product Based on Smap Active-Passive Approach Using Copernicus Sentinel 1 Data by Das, Narendra N., Entekhabi, Dara, Kim, Seungbum, Jagdhuber, Thomas, Dunbar, Scott, Yuehl, Simon, Oneill, P. E., Colliander, Andreas, Walker, Jeffery, Jackson, Thomas J.

“…SMAP project released a new enhanced high-resolution (3km) soil moisture active-passive product. This product is obtained by combining the SMAP radiometer data…”
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Effect of Digital Elevation Model resolution on topographic correction of airborne SAR by Goyal, S. K., Seyfried, M. S., O'Neill, P. E.

“…Topography in high relief mountainous areas may mask the signal variation in airborne Synthetic Aperture Radar (SAR) data caused by soil moisture, surface…”
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A First-Order Radiative Transfer Model for Microwave Radiometry of Forest Canopies at L-Band by Kurum, M., Lang, R. H., O'Neill, P. E., Joseph, A. T., Jackson, T. J., Cosh, M. H.

“…In this study, a first-order radiative transfer (RT) model is developed to more accurately account for vegetation canopy scattering by modifying the basic τ-ω…”
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Passive Microwave Soil Moisture Research by Schmugge, Thomas, O'Neill, Peggy E., Wang, James R.

“…During the four years of the AgRISTARS Program, significant progress was made in quantifying the capabilities of microwave sensors for the remote sensing of…”
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