Datasets


Published By US Fish and Wildlife Service, Department of the Interior

Issued over 9 years ago

US
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Summary

Type of release
a one-off release of a set of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

This data set includes 22 georeferenced images, acquired on November 7th and 9th, 1965, over portions of Bear River Migratory Bird Refuge, in Box Elder County, Utah. The frames were downloaded from Earth Explorer USGS and georeferenced within ArcGIS. The image files are named by frame number and can be referenced in the attached map. These images are georeferenced versions of original black and white aerial photographs downloaded from Earth Explorer USGS. The original photo was georeferenced against the Box Elder County 2014 NAIP images. There are 22 total frames in this collection covering all of the impounded areas of the refuge. The reference map can be used to identify locations of the images in relation to the refuge boundary. These images provide a valuable look back in time before the major flooding which occurred in the early 1980s which the Great Salt Lake covered nearly all of the refuge. Flooding conditions remained for 56 years. These images given their high resolution; resolution 0.66 meters allow delineation of landscape features and habitats including original infrastructure including levees and roads, distribution of emergent vegetation, etc. Change over time estimates can be made from these images using current imagery for comparison. These images, and others from 1937, are being used by refuge staff to assist in understanding and visualizing the historical content of the lands within the refuge and how they have changed over the last 80 years. Pixel resolution of these images is 0.66 meters. These images should be used for resourcelevel interpretation only.


Published By Small Business Administration

Issued over 9 years ago

US
beta

Summary

Type of release
a one-off release of a single dataset

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

Reflects amounts charged off by fiscal year for the major loan programs and aggregate totals for the small direct and guarantied programs.


Published By Federal Emergency Management Agency, Department of Homeland Security

Issued over 9 years ago

US
beta

Summary

Type of release
ongoing release of a series of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual- chance flood event, and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA). Spatial data is georeferenced to the earth surface using the Wisconsin Transverse Mercator projected coordinate system and the North American Datum of 1983. The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:6000.


Published By National Oceanic and Atmospheric Administration, Department of Commerce

Issued over 9 years ago

US
beta

Summary

Type of release
ongoing release of a series of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

Knowledge of the timing and strength of tidal currents is extremely important for safe navigation in coastal waters. Tidal currents are almost always the strongest current experienced by vessels operating offshore and for considerable distances inside bays and river estuaries. Standardized procedures exist for analyzing tidal current data to separate the tidal and nontidal parameters. The tidal parameters are used to produce the National Ocean Service Tidal Current Tables. Daily predictions are made based on information obtained from current reference stations in short-term current studies. Additional predictions are made for 2200 locations referenced to these tidal current reference stations. Predictions have varying degrees of accuracy dependant on the age of the data, the length of the measurements and the degree of non tidal influence a given location experiences. A clear understanding of current patterns in ports and estuaries which have economical and commercial importance is vital to ensure safe navigation and help in preventing accidents. In ports where currents are dominated by non-tidal factors, real-time current measurements are preferred.


Published By Social Security Administration

Issued over 9 years ago

US
beta

Summary

Type of release
a one-off release of a set of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

A central place for congressional data, zip code, census, etc


Published By Department of Labor

Issued over 9 years ago

US
beta

Summary

Type of release
a one-off release of a single dataset

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

The Mine dataset lists all Coal and Metal/Non-Metal mines under MSHA's jurisdiction since 1/1/1970. It includes such information as the current status of each mine (Active, Abandoned, NonProducing, etc.), the current owner and operating company, commodity codes and physical attributes of the mine. Mine ID is the unique key for this data.


Published By US Census Bureau, Department of Commerce

Issued over 9 years ago

US
beta

Summary

Type of release
a one-off release of a set of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

After each decennial census, the Census Bureau delineates urban areas that represent densely developed territory, encompassing residential, commercial, and other nonresidential urban land uses. In general, this territory consists of areas of high population density and urban land use resulting in a representation of the "urban footprint." There are two types of urban areas: urbanized areas (UAs) that contain 50,000 or more people and urban clusters (UCs) that contain at least 2,500 people, but fewer than 50,000 people (except in the U.S. Virgin Islands and Guam which each contain urban clusters with populations greater than 50,000). Each urban area is identified by a 5-character numeric census code that may contain leading zeroes.


Published By Department of Veterans Affairs

Issued over 9 years ago

US
beta

Summary

Type of release
a one-off release of a set of related datasets

Licence
Creative Commons CCZero

Verification
automatically awarded

Description

The Medical Care Cost Recovery National Database (MCCR NDB) provides a repository of summary Medical Care Collections Fund (MCCF) billing and collection information used by program management to compare facility performance. It stores summary information for Veterans Health Administration (VHA) receivables including the number of receivables and their summarized status information. This database is used to monitor the status of the VHA's collection process and to provide visibility on the types of bills and collections being done by the Department. The objective of the VA MCCF Program is to collect reimbursement from third party health insurers and co-payments from certain non-service-connected (NSC) Veterans for the cost of medical care furnished to Veterans. Legislation has authorized VHA to: submit claims to and recover payments from Veterans' third party health insurance carriers for treatment of non-service-connected conditions; recover co-payments from certain Veterans for treatment of non-service-connected conditions; and recover co-payments for medications from certain Veterans for treatment of non-service-connected conditions. All of the information captured in the MCCR NDB is derived from the Accounts Receivable (AR) modules running at each medical center. MCCR NDB is not used for official collections figures; instead, the Department uses the Financial Management System (FMS).


Published By Nuclear Regulatory Commission

Issued over 9 years ago

US
beta

Summary

Type of release
a one-off release of a single dataset

Licence
Creative Commons CCZero

Verification
automatically awarded

Description

Raw data of all the events for the last month. Raw data is presented in pipe delimited format. This data set is updated monthly on the first business day of the month.


Published By National Oceanic and Atmospheric Administration, Department of Commerce

Issued over 9 years ago

US
beta

Summary

Type of release
ongoing release of a series of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

The CO-OPS Station Map has many features designed to provide a quick and easy way to find a CO-OPS station, and to view real-time observations as well as plot the last 48 hours of data


Published By National Oceanic and Atmospheric Administration, Department of Commerce

Issued over 9 years ago

US
beta

Summary

Type of release
ongoing release of a series of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

The global temperature time series provides time series charts using station based observations of daily temperature. These charts provide information about the observations compared to the derived daily normal temperature for various time scales (30, 90, 365 days). Each station has a graphic that contains three charts. The first chart in the graphic is a time series in the format of a line graph, representing the daily average temperatures compared to the expected daily normal temperatures. The second chart is a bar graph displaying daily departures from normal, including a line depicting the mean departure for the period. The third chart is a time series of the observed daily maximum and minimum temperatures. The graphics are updated daily and the graphics reflect the updated observations including the latest daily data available. The available graphics are rotated, meaning that only the most recently created graphics are available. Previously made graphics are not archived.


Published By Office of Personnel Management

Issued over 9 years ago

US
beta

Summary

Type of release
a one-off release of a set of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

Used in the federal investigative process to conduct fingerprint checks


Published By Department of Education

Issued over 9 years ago

US
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Summary

Type of release
ongoing release of a series of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

Arts Education Surveys of Elementary School Teachers, 2009 is a study that is part of the Quick Response Information System. FRSS 102 (http://nces.ed.gov/surveys/frss/) is a sample survey that provides national estimates on arts education and arts instructors in public elementary schools during the 2009-10 school year. The study was conducted using mailed questionnaires that could be completed via mail or the web. Follow-up telephone interviews were also conducted. Elementary school teachers were sampled. The response rate for each of the three surveys was 86.5 percent for the music specialist survey, 87.6 percent for the visual arts specialist survey, and 81.5 percent for the classroom teacher survey. Key statistics produced from FRSS 102 were data on the teaching load of music and visual arts specialists in elementary schools; teacher participation in various professional development activities; the ways in which self-contained classroom teachers teach arts education as part of their instructional program; and teachers� use of formal methods of assessment of students� achievement in the arts.


Published By Department of State

Issued over 9 years ago

US
beta

Summary

Type of release
a one-off release of a single dataset

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

The Programme for International Student Assessment (PISA) was created by the OECD member countries in 1997 to produce direct assessments of student performance, on a regular basis in an efficient, timely and cost-effective manner; and to provide more relevant and powerful indicators of human capital. PISA produces assessments of reading literacy, mathematical literacy, scientific literacy and a growing range of cross-curricular competencies among 15-year-olds in school. The dataset contains the anonymized records from the over 450,000 students in 65 countries who were sampled and took the PISA assessments. The records include background information about the students as well as their motivations and learning styles. Background information on the schools attended by the students including school level policies and practices is included in the dataset.


Published By U.S. Geological Survey, Department of the Interior

Issued over 9 years ago

US
beta

Summary

Type of release
ongoing release of a series of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

This tabular data set represents the mean base-flow index expressed as a percent, compiled for every catchment in NHDPlus for the conterminous United States. Base flow is the component of streamflow that can be attributed to ground-water discharge into streams. The source data set is Base-Flow Index for the Conterminous United States (Wolock, 2003). The NHDPlus Version 1.1 is an integrated suite of application-ready geospatial datasets that incorporates many of the best features of the National Hydrography Dataset (NHD) and the National Elevation Dataset (NED). The NHDPlus includes a stream network (based on the 1:100,00-scale NHD), improved networking, naming, and value-added attributes (VAAs). NHDPlus also includes elevation-derived catchments (drainage areas) produced using a drainage enforcement technique first widely used in New England, and thus referred to as "the New England Method." This technique involves "burning in" the 1:100,000-scale NHD and when available building "walls" using the National Watershed Boundary Dataset (WBD). The resulting modified digital elevation model (HydroDEM) is used to produce hydrologic derivatives that agree with the NHD and WBD. Over the past two years, an interdisciplinary team from the U.S. Geological Survey (USGS), and the U.S. Environmental Protection Agency (USEPA), and contractors, found that this method produces the best quality NHD catchments using an automated process (USEPA, 2007). The NHDPlus dataset is organized by 18 Production Units that cover the conterminous United States. The NHDPlus version 1.1 data are grouped by the U.S. Geologic Survey's Major River Basins (MRBs, Crawford and others, 2006). MRB1, covering the New England and Mid-Atlantic River basins, contains NHDPlus Production Units 1 and 2. MRB2, covering the South Atlantic-Gulf and Tennessee River basins, contains NHDPlus Production Units 3 and 6. MRB3, covering the Great Lakes, Ohio, Upper Mississippi, and Souris-Red-Rainy River basins, contains NHDPlus Production Units 4, 5, 7 and 9. MRB4, covering the Missouri River basins, contains NHDPlus Production Units 10-lower and 10-upper. MRB5, covering the Lower Mississippi, Arkansas-White-Red, and Texas-Gulf River basins, contains NHDPlus Production Units 8, 11 and 12. MRB6, covering the Rio Grande, Colorado and Great Basin River basins, contains NHDPlus Production Units 13, 14, 15 and 16. MRB7, covering the Pacific Northwest River basins, contains NHDPlus Production Unit 17. MRB8, covering California River basins, contains NHDPlus Production Unit 18.


Published By Federal Emergency Management Agency, Department of Homeland Security

Issued over 9 years ago

US
beta

Summary

Type of release
ongoing release of a series of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA). The file is georeferenced to earth's surface using the UTM projection and coordinate system. The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12,000.


Published By National Oceanic and Atmospheric Administration, Department of Commerce

Issued over 9 years ago

US
beta

Summary

Type of release
ongoing release of a series of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

This is one of the CPC?s Monthly Atmospheric and SST Indices. It is the 200-hPa zonal wind anomalies averaged over the area 5oN ? 5oS, 165oW-110oW. The anomalies are departures from the 1981-2010 base period means.


Published By Office of Personnel Management

Issued over 9 years ago

US
beta

Summary

Type of release
a one-off release of a single dataset

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

A listing of costs, brochures and popular benefits in the Federal Employees Health Benefits Program (FEHBP) based on search criteria.



Summary

Type of release
a one-off release of a single dataset

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

Incident/Accident Reports - Pipeline operators are required to submit incident reports within 30 days of a pipeline accident or incident. The key information that is collected contains; in-depth location information, facility and operating information, and cause of the accident and incident. Specific information includes the time and location of the incident, number of any injuries and/or fatalities, commodity spilled/gas released, causes of failure and evacuation procedures. Data sets are by following system types: 1) GD-Incident : Incident Report for Gas Distribution System, 2) GTGG-Incident: Incident Report for Natural and Other Gas Transmission and Gathering Systems, 3) HL-Incident: Accident Report for Hazardous Liquid Pipeline Systems, and 4) LNG-Incident: Incident Report for Liquefied Natural Gas (LNG) Facilities.


Published By National Aeronautics and Space Administration

Issued over 9 years ago

US
beta

Summary

Type of release
a one-off release of a single dataset

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

Exquadrum proposes a high-performance liquid bi-propellant rocket engine that uses propellants that are non-toxic, self-pressurizing, and low cost. The proposed engine and propellants provide the same performance as state-of-the-art storable propellants. The propellants are storable for long durations without decomposition or degradation. Because the propellants are self-pressurizing, they offer the potential for overall system weight savings by eliminating the pressurization system. In Phase I, Exquadrum will develop this engine concept through trade studies and analyses and conclude with a proof-of-concept hot fire demonstration of a full-scale laboratory engine. In Phase II, Exquadrum will mature the engine design to detail design, and deliver a full-scale engine to NASA for functional and environmental testing under simulated mission conditions.


Published By National Oceanic and Atmospheric Administration, Department of Commerce

Issued over 9 years ago

US
beta

Summary

Type of release
ongoing release of a series of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

On October 17, 1989, a 7.1 magnitude earthquake occurred near Loma Prieta in the Santa Cruz Mountains. Movement occurred along a 40-km segment of the San Andreas fault from southwestof Los Gatos to north of San Juan Bautista. This slide set includes damage in the more rural areas affected by the quake including: Boulder Creek, Aptos, Los Gatos, San Jose, Scott's Valley, and Watsonville. The slides also depict earth cracks and structural damage to homes in the Santa Cruz Mountains.Effects in Loma Prieta Vicinity - On October 17, 1989, at 5:04 P.M. (PDT), a 7.1 magnitude earthquake occurred near Loma Prieta in the Santa Cruz mountains, California. Movement occurred along a 40-km segment of the San Andreas fault from southwest of Los Gatos to north of San Juan Bautista. Measurements along Earth's surface after the earthquake show that the Pacific plate moved 1.9 m to the northwest and 1.3 m upward over the North American plate. The upward motion resulted from deformation of the plate boundary at the bend in the San Andreas fault. At the surface, the fault motion was evident as a complexseries of cracks and fractures. This earthquake was not unexpected. During the 1906 San Francisco earthquake, there was only about one meter of movement on the Santa Cruz segment of the San Andreas fault. Farther north in the San Francisco area, there was more than 2.5 m of movement. This indicated that all of thestrain had not been released in the Santa Cruz segment in the 1906 earthquake so this segment was likely to break before the northern segment. Thousands of landslides occurred throughout the area blocking roads and highways, hampering rescue efforts and causing damage to structures. Landslides were particularly prevalent in the Santa Cruz mountains, where they occur regularly even without earthquakes. These slides resulted in at least two deaths. One slump slide near Laurel took with it several dozen houses damaging them severely. Thirty percent of the buildings in the Pacific Garden Mall in downtown Santa Cruz were damaged severely by amplified ground shaking and ground deformation. The mall lies on unconsolidated deposits. One hundred thirty buildings-many dating from the 19th Century-were damaged in this historic section. Several hundred houses were either severely damaged or destroyed. The worst ground shaking appeared to occur in the Santa Cruz Mountains close to the epicenter. Many buildings were damaged or destroyed by ground cracking and shaking and by landsliding. Scores of mountain homes were also destroyed. Initial damages were estimated at $350 million in Santa Cruz. In Watsonville, two adjacent buildings of a department store sustained extensive structural damage due to a weak first story, insufficient shear reinforcement of the columns, and possible pounding of the two structures. Recently constructed buildings with tilt-up walls performed well. At the Stanford University campus, 30 miles northwest of the epicenter, 60 buildings sustained varying degrees of damage, with an estimated repair cost of $160 million. Concrete sidewalks and curbs were systematically fractured and buckled on northeast trending streets throughout downtown Los Gatos. Hollister also experienced severe damage. Sand boils appear in irrigated fields near Hollister. San Jose and Gilroy also reported collapsed and damaged buildings. Boulder Creek, Redwood Estates, Los Gatos, Scott's Valley, Santa Cruz, and Watsonville all experienced strong ground shaking and had a high percentage of damaged structures. These towns were only 16 to 32 km from the epicenter. The older structures in these towns were vulnerable for one or more of the following reasons: deterioration of the structure, lack of ties to the foundation, unreinforced masonry (brick or stone), lack of shear resistance in the ground floor, pounding of adjacent structures, and timber diaphragms not tied to unreinforced masonry walls, which allowed separation or pushing out of the walls. In the epicentral area most of the damage resulted from the strong ground shaking and landsliding. Ground shaking primarily affected unreinforced masonry structures, and was enhanced in areas of fine-grained sand. Landslides occurred on steep slopes where ground shaking was most severe.


Published By U.S. Geological Survey, Department of the Interior

Issued over 9 years ago

US
beta

Summary

Type of release
a one-off release of a single dataset

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

This part of DS 781 presents data for faults for the geologic and geomorphic map of the Offshore of Half Moon Bay map area, California. The vector data file is included in "Faults_OffshoreHalfMoonBay.zip," which is accessible from http://pubs.usgs.gov/ds/781/OffshoreHalfMoonBay/data_catalog_OffshoreHalfMoonBay.html. The Offshore of Half Moon Bay map area lies about 12 km southwest of the San Andreas Fault, the dominant structure in the distributed, right-lateral, transform boundary between the North American and Pacific plates. The map area straddles the right-lateral San Gregorio Fault, the most important structure west of the San Andreas Fault in this broad zone. The San Gregorio is part of fault system that occurs predominantly in the offshore, extending about 400 km from Point Conception on the south to Bolinas and Point Reyes on the north (Dickinson and others, 2005), intersecting land at a few coastal promontories. In the Offshore of Half Moon Bay map area, the San Gregorio Fault forms a distributed shear zone about 2 to 4.5 km wide that includes two primary diverging fault strands. The eastern strand (also known as the Seal Cove Fault or Coastways Fault) roughly parallels the shoreline, lies onshore for about 3 km at Pillar Point, and locally forms the boundary between outcrops of Cretaceous grantic rocks to the east and Purisima Formation to the west. The western strand (also known as the Frijoles Fault) lies entirely offshore and forms a boundary between the Purisima Formation on the east and undifferentiated Cretaceous and (or) Tertiary rocks (Pigeon Point Formation?) of the Pigeon Point structural block (McCulloch, 1987) on the west. The Pigeon Point block forms a northwest-trending bedrock ridge that extends offshore for about 30 km from Pescadero Point and forms the northwest boundary of the outer Santa Cruz Basin (McCulloch, 1987). Cumulative lateral slip on the San Gregorio Fault zone is thought to range from 4 to 10 mm/yr in this region (U.S. Geological Survey, 2010). Bathymetric (Bathymetry--Offshore Half Moon Bay, California, DS 781) and seismic-reflection data (see field activity S-15-10-NC) reveal that the offshore outcrops of the Purisima Formation between the eastern and western strands of the San Gregorio Fault Zone are spectacularly folded, faulted and rotated by the strike-slip motion and drag along the faults. The entire map area lies along strike with the young, high topography of the Santa Cruz Mountains and Coast Ranges. This regional uplift has been linked to a northwest transpressive bend in the San Andreas Fault (for example, Zoback and others, 1999). Uplift of nearby marine terraces at rates up to 0.44 mm/yr confirms that this uplift includes the coastal zone (Weber and others, 1995). Faults were primarily mapped by interpretation of seismic reflection profile data (see field activity S-15-10-NC). The seismic reflection profiles were collected between 2007 and 2010. References Cited Dickinson, W.R., Ducea, M., Rosenberg, L.I., Greene, H.G., Graham, S.A., Clark, J.C., Weber, G.E., Kidder, S., Ernst, W.G., and Brabb, E.E., 2005, Net dextral slip, Neogene San Gregorio-Hosgri fault zone, coastal California: Geologic evidence and tectonic implications: Geological Society of America Special Paper 391, 43 p. McCulloch, D.S., 1987, Regional geology and hydrocarbon potential of offshore Central California, in Scholl, D.W., Grantz, A., and Vedder, J.G., eds., Geology and resource potential of the continental margin of Western North America and adjacent ocean basins - Beaufort Sea to Baja California: Circum-Pacific Council for Energy and Mineral Resources Earth Science Series, v. 6, p. 353-401. U.S. Geological Survey and California Geological Survey, 2010, Quaternary fault and fold database for the United States, accessed April 5, 2012, from USGS website: http://earthquake.usgs.gov/hazards/qfaults/. Weber, G.E., Nolan, J.M., and Zinn, E.N., 1995, Determination of late Pleistocene-Holocene slip rates along the San Gregorio fault zone, San Mateo and Santa Cruz counties, California: Final Technical Report, National Earthquake Hazard Reduction Program, Contract No. 1434-93-G-2336, 70 p., 4 map sheets. Zoback, M.L., Jachens, R.C., and Olson, J.A., 1999, Abrupt along-strike change in tectonic style: San Andreas fault zone, San Francisco Peninsula: Journal of Geophysical Research, v. 104 (B5), p. 10,719-10,742.


Published By National Oceanic and Atmospheric Administration, Department of Commerce

Issued over 9 years ago

US
beta

Summary

Type of release
ongoing release of a series of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

The ionosphere is that part of the Earth's atmosphere that results mainly from the ionizing effect of Solar electromagnetic radiation. For poleware latitudes, the ionizing effect of incident energetic particles is also significant. Traditionally, the following ionospheric regions and their approximate height ranges have been designated: D region (60-90 km); E region (90-150 km); F1 region (150-250 km); and F2 region (above 250 km). Ionosondes utilize the radio wave-reflecting properties of the ionosphere. The product of the speed of light in a vacuum and half the elapsed time between vertical transmission of a single frequency electromagnetic wave and reception of the reflected wave at the transmitting location is defined as the virtual height of that frequency. A sweep-frequency ionogram is a plot of virtual height versus frequency and is recorded as nearly instantaneously as possible. These ionospheric data consists mainly of hourly values for at least one to a maximum of all of the following ionospheric characteristics (parameters). They are foF2, M(3000)F2, hF2, foF1, M(3000)F1, hF, foE, hE, foE2, hE2, foEs, fbEs, hEs, fmI, and fxI. The values are five byte (character) fields. The first three bytes of the field are reserved for a numeric value; the last two bytes are reserved for the qualifying and descriptive letter, if present. There are no decimals encoded in these data. Documentation is supplied with each data order. Data are archived on CDROM, optical disk, and magnetic tape. There are two CD-ROM's sold as a set. One contains 1957 - 1975 data; the other contains 1976-1990 data. The CDROM contains ASCII files and runs on DOS-compatible machines. A catalog, which lists the contents of the CDROM data set, is available via anonymous FTP.ngdc.noaa.gov and GOPHER.ngdc.noaa.gov in the /STP/IONOSPHERE/CATALOG directory. Additional data are available, but have not yet been put on CDROM. Data are also available on magnetic tape and IBM compatible diskette.


Published By National Aeronautics and Space Administration

Issued over 9 years ago

US
beta

Summary

Type of release
a one-off release of a single dataset

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

Both the JSC Mark III and the ARC AX-5 suit have been designed to operate at a pressure of 8.3 psi. Current space shuttle spacesuits operate at 4.3 psi and require a time-consuming pre-breathing operation prior to the beginning of any spacewalk. Polygons: 34892 Vertices: 35222


Published By Department of Housing and Urban Development

Issued over 9 years ago

US
beta

Summary

Type of release
a one-off release of a single dataset

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

Picture of Subsidized Households describes the nearly 5 million households living in HUD-subsidized housing in the United States for the year 2008. Picture 2008 provides characteristics of assisted housing units and residents, summarized at the national, state, public housing agency (PHA), project,census tract, county, Core-Based Statistical Area and city levels.