Conference Papers
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Geologic setting of the West Flank, a FORGE site adjacent to the Coso geothermal field Geologic setting of the West Flank, a FORGE site adjacent to the Coso geothermal field
The West Flank FORGE (Frontier Observatory for Research in Geothermal Energy) site is located immediately west and outside of the Coso geothermal field, eastern California. Coso is a fluid-dominated, high temperature geothermal system that has been producing power continuously since 1987. The reservoir is composed of highly faulted, fractured and hydrothermally altered Cretaceous and...
Authors
Andrew Sabin, Kelly Blake, Mike Lazaro, Dave Meade, Douglas Blankenship, Mack Kennedy, Jess McCulloch, Steve DeOreo, Stephen H. Hickman, Jonathan M.G. Glen, J. Ole Kaven, Martin Schoenball, Colin F. Williams, Geoffrey Phelps, James Faulds, Nick Hinz, Wendy Calvin, Drew Siler, Ann Robertson-Tait
Enriching the national map database for multi-scale use: Introducing the visibilityfilter attribution Enriching the national map database for multi-scale use: Introducing the visibilityfilter attribution
The US Geological Survey’s (USGS) National Geospatial Technical Operations Center is prototyping and evaluating the ability to filter data through a range of scales using 1:24,000-scale The National Map (TNM) datasets as the source. A “VisibilityFilter” attribute is under evaluation that can be added to all TNM vector data themes and will permit filtering of data to eight target scales...
Authors
Andrew J. Stauffer, Seth Webinger, Brittany Roche
First steps for mitigating bycatch of Pink-footed Shearwaters Ardenna creatopus: Identifying overlap of foraging areas and fisheries in Chile First steps for mitigating bycatch of Pink-footed Shearwaters Ardenna creatopus: Identifying overlap of foraging areas and fisheries in Chile
The Pink-footed Shearwater, Ardenna creatopus, is listed as in danger of extinction by Chile and under Annex 1 of ACAP, with an estimated global population of approximately 56,000 individuals. Incidental bycatch of this species in fisheries is thought to be an important cause in population decline (i.e. annual estimated mortality of >1000 adults). This species is an endemic breeder in...
Authors
Ryan Carle, Jonathan J. Felis, Verónica López, Josh Adams, Peter Hodum, Jessie Beck, Valentina Colodro, Rodrigo Vega, Andres Gonzalez
Landsat-7 ETM+ radiometric calibration status Landsat-7 ETM+ radiometric calibration status
Now in its 17th year of operation, the Enhanced Thematic Mapper + (ETM+), on board the Landsat-7 satellite, continues to systematically acquire imagery of the Earth to add to the 40+ year archive of Landsat data. Characterization of the ETM+ on-orbit radiometric performance has been on-going since its launch in 1999. The radiometric calibration of the reflective bands is still monitored...
Authors
Julia A. Barsi, Brian L. Markham, J. S. Czapla-Myers, Dennis L. Helder, Simon Hook, John R. Schott, Obaidul Haque
Migratory routes and at-sea threats to Pink-footed Shearwaters Migratory routes and at-sea threats to Pink-footed Shearwaters
The Pink-footed Shearwater (Ardenna creatopus) is a seabird with a breeding range restricted to three islands in Chile and an estimated world population of approximately 56,000 breeding individuals (Muñoz 2011, Oikonos unpublished data). Due to multiple threats on breeding colonies and at-sea, Pink-footed Shearwaters are listed as Endangered by the government of Chile (Reglamento de...
Authors
Josh Adams, Jonathan J. Felis, Peter Hodum, Valentina Colodro, Ryan Carle, Verónica López
Radiometric calibration updates to the Landsat collection Radiometric calibration updates to the Landsat collection
The Landsat Project is planning to implement a new collection management strategy for Landsat products generated at the U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center. The goal of the initiative is to identify a collection of consistently geolocated and radiometrically calibrated images across the entire Landsat archive that is readily suitable for...
Authors
Esad Micijevic, Obaidul Haque, Nischal Mishra
Seiche-induced unsteady flows in the Huron-Erie Corridor: Spectral analysis of oscillations in stage and discharge in the St. Clair and Detroit Rivers Seiche-induced unsteady flows in the Huron-Erie Corridor: Spectral analysis of oscillations in stage and discharge in the St. Clair and Detroit Rivers
Animations of highly dynamic water-surface profiles through the St. Clair and Detroit Rivers have identified transient disturbances propagating from Lakes Huron and Erie into the St. Clair and Detroit Rivers, respectively. To determine any relation to seiche and tidal oscillations on Lakes Huron and Erie, a spectral analysis was performed on stage and discharge data from the Huron-Erie...
Authors
P. Ryan Jackson
Three-dimensional numerical modeling of mixing at the junction of the Calumet-Sag Channel and the Chicago Sanitary and Ship Canal: A comparison between density-driven and advection-driven mixing Three-dimensional numerical modeling of mixing at the junction of the Calumet-Sag Channel and the Chicago Sanitary and Ship Canal: A comparison between density-driven and advection-driven mixing
The Chicago Area Waterway System (CAWS) includes the Chicago Sanitary and Ship Canal (CSSC) and the Calumet-Sag Channel (Cal-Sag), the two primary, man-made connections between the Mississippi River Basin and the Great Lakes. The U.S. Geological Survey (USGS) monitors diversion of Great Lakes water at a streamgage just downstream of the confluence of the CSSC and Cal-Sag (known as Sag...
Authors
Dongchen Wang, Som Dudda, P. Ryan Jackson, Marcelo H. Garcia
Validation of the ASTER Global Digital Elevation Model version 3 over the conterminous United States Validation of the ASTER Global Digital Elevation Model version 3 over the conterminous United States
The ASTER Global Digital Elevation Model Version 3 (GDEM v3) was evaluated over the conterminous United States in a manner similar to the validation conducted for the original GDEM Version 1 (v1) in 2009 and GDEM Version 2 (v2) in 2011. The absolute vertical accuracy of GDEM v3 was calculated by comparison with more than 23,000 independent reference geodetic ground control points from...
Authors
Dean B. Gesch, Michael J. Oimoen, Jeffrey J. Danielson, David Meyer
Spatial differences in hydrologic characteristics and water chemistry of a temperate coastal plain peatland: The Great Dismal Swamp, USA Spatial differences in hydrologic characteristics and water chemistry of a temperate coastal plain peatland: The Great Dismal Swamp, USA
Spatial differences in hydrologic processes and geochemistry across forested peatlands control the response of the wetland-community species and resiliency to natural and anthropogenic disturbances. Knowing these controls is essential to effectively managing peatlands as resilient wetland habitats. The Great Dismal Swamp is a 45,325 hectare peatland in the Atlantic Coastal Plain of...
Authors
Gary K. Speiran, Frederick C. Wurster
Applications for General Purpose Command Buffers: The Emergency Conjunction Avoidance Maneuver Applications for General Purpose Command Buffers: The Emergency Conjunction Avoidance Maneuver
A case study is presented for the use of Relative Operation Sequence (ROS) command buffers to quickly execute a propulsive maneuver to avoid a collision with space debris. In this process, a ROS is custom-built with a burn time and magnitude, uplinked to the spacecraft, and executed in 15 percent of the time of the previous method. This new process provides three primary benefits. First...
Authors
Robert J Scheid, Martin England
Bigheaded carps of the Yangtze and Mississippi Rivers: Biology, status, and management Bigheaded carps of the Yangtze and Mississippi Rivers: Biology, status, and management
No abstract available.
Authors
Duane Chapman, Daqing Chen, Jan J. Hoover, Hao Du, Quinton E. Phelps, Li Shen, Chenyou Wang, Qiwei Wei, Hui Zhang