Conference Papers
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
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Understanding aquatic animal virus survival and trafficking and its role in risk assessment Understanding aquatic animal virus survival and trafficking and its role in risk assessment
The stability of infectious agents in different media and under different physical and chemical environments has been extensively studied for some viruses and virtually ignored for others. Gaps in our knowledge are due in part to difficulties in reproducing virus «life cycles» and determination if the agent is in fact inactive. Additionally, isolation of the agent under certain...
Authors
S. LaPatra, R. Troyer, W. Shewmaker, G. Jones, Gael Kurath
Potential drinking water concerns in ground and surface water in the Illinois River Basin; U.S. Geological Survey perspective from the National Water Quality Assessment Potential drinking water concerns in ground and surface water in the Illinois River Basin; U.S. Geological Survey perspective from the National Water Quality Assessment
No abstract available.
Authors
Kelly L. Warner, Paul J. Terrio, Robin B. King, George E. Groschen, Terri Arnold, William S. Morrow, Michael J. Friedel, Mitchell A. Harris
Late-stage development of the Bryant Canyon turbidite pathway on the Louisiana continental slope Late-stage development of the Bryant Canyon turbidite pathway on the Louisiana continental slope
GLORIA sidescan imagery, multibeam bathymetry, seismic profiles, and piston cores (3–5 m penetration) reveal the near-surface geology of the Bryant Canyon turbidite pathway on the continental margin of Louisiana. This pathway extends from the continental shelf edge, across the continental slope, to a deep-sea fan on the continental rise. The pathway is narrow (
Authors
David C. Twichell, Hans Nelson, John E. Damuth
Land and water-resource development activities increase sinkhole frequency in the mantled karst region of Florida, USA Land and water-resource development activities increase sinkhole frequency in the mantled karst region of Florida, USA
No abstract available.
Authors
Ann B. Tihansky, Devin L. Galloway
Modeling residual aquifer-system compaction--Constraining the vertical hydraulic diffusivity of thick aquitards Modeling residual aquifer-system compaction--Constraining the vertical hydraulic diffusivity of thick aquitards
No abstract available.
Authors
Michelle Sneed, Michael T. Pavelko, Devin L. Galloway
Mapping recoverable aquifer-system deformation and land subsidence in Santa Clara Valley, California, USA, using space-borne synthetic aperture radar Mapping recoverable aquifer-system deformation and land subsidence in Santa Clara Valley, California, USA, using space-borne synthetic aperture radar
No abstract available.
Authors
Devin L. Galloway, R. Burgmann, E. Fielding, F. Amelung, R.L. Laczniak
Assessing the accuracy of large-area land cover maps — Experiences from the Multi-resolution Land-cover Characteristics (MRLC) project Assessing the accuracy of large-area land cover maps — Experiences from the Multi-resolution Land-cover Characteristics (MRLC) project
No abstract available.
Authors
Stephen V. Stehman, James D. Wickham, Limin Yang, Jonathan H. Smith
Landsat 7 on-orbit geometric calibration and performance Landsat 7 on-orbit geometric calibration and performance
The Landsat 7 Image Assessment System was developed to characterize and calibrate the radiometric and geometric performance of the Landsat 7 Enhanced Thematic Mapper Pius (ETM+) instrument. Algorithms and software assess the geometric performance of the Landsat 7 spacecraft and ETM+ sensor system and perform geometric calibration by estimating sensor and spacecraft geometric parameters...
Authors
James C. Storey, Mike Choate
Landsat 5/Landsat 7 underfly cross-calibration experiment Landsat 5/Landsat 7 underfly cross-calibration experiment
There was a one-time opportunity to obtain nearly coincident coverage from both Landsat 5 and Landsat 7 as Landsat 7 drifted to its final orbital position during the initialization and verification phase following launch. During the underfly period, Landsat 7 Enhanced Thematic Mapper Plus (ETM+) data were collected using the U.S Landsat 7 ground station network and the solid-state...
Authors
Grant R. Mah, James Vogelmann, Mike Choate
Landsat 7 processing on the EROS Data Center's National Land Archive Processing System (NLAPS) Landsat 7 processing on the EROS Data Center's National Land Archive Processing System (NLAPS)
Staff at the U.S. Geological Survey (USGS) EROS Data Center (EDC) process Landsat 7 data for customer distribution on two distinct systems. The Distributed Active Archive Center (DAAC) processing is done on the Level -1 Product Generation System (LPGS), and the USGS processing is completed on the National Land Archive Processing System (NLAPS). The NLAPS is capable of processing data...
Authors
Brenda Jones, LeAnn Dix
Mississippi Delta management systems evaluation area; insecticides in runoff, 1996-99 Mississippi Delta management systems evaluation area; insecticides in runoff, 1996-99
no abstract available.
Authors
L.M. Southwick, Richard A. Rebich, J.L. Fouss, Jeffery A. Ballweber
Recent planetary topographic mapping at the USGS, Flagstaff: Moon, Mars, Venus, and beyond Recent planetary topographic mapping at the USGS, Flagstaff: Moon, Mars, Venus, and beyond
We are currently using stereophotogrammetric techniques to compile digital topographic models of parts of the Moon, Mars, Venus, and the asteroid Eros in support of the NASA program of planetary exploration. This work requires the synergistic use of the USGS digital cartographic software system ISIS for data ingestion and calibration steps, along with the commercial software SOCET SET...
Authors
Randolph L. Kirk, Elpitha Howington-Kraus, Mark R. Rosiek