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1. NOAA National Centers for Environmental Prediction (NCEP)'s Global Forecast System (GFS) Model [NOAA_NCEP_GFS_Model]
Two times daily global analysis fields from the NOAA National Centers for Environmental Prediction (NCEP)'s Global Forecast System (GFS) Model. Data are served by the Center for Ocean-Land-Atmosphere ...


2. NOAA/NCEP Global Forecast System (GFS) Atmospheric Model [ncep_global]
U.S. National Oceanic and Atmospheric Administration (NOAA) National Centers for Environmental Prediction (NCEP) Global Forecast System (GFS) numerical weather prediction model 8-day, 3-hourly forecast ...


3. DMSP SSM/I-SSMIS Pathfinder Daily EASE-Grid Brightness Temperatures [NSIDC-0032]
This Level-3 Equal-Area Scalable Earth-Grid (EASE-Grid) Brightness Temperature data set, collected since 09 July 1987, is a part of the NOAA/NASA Pathfinder Program. The data set consists of gridded ...


4. Nimbus-7 SMMR Pathfinder Daily EASE-Grid Brightness Temperatures [NSIDC-0071]
This data set consists of brightness temperatures acquired from the Scanning Multichannel Microwave Radiometer (SMMR) on board the Nimbus-7 Pathfinder satellite. The brightness temperatures have been ...


5. Northern Hemisphere EASE-Grid 2.0 Weekly Snow Cover and Sea Ice Extent [NSIDC-0046]
The Northern Hemisphere EASE-Grid 2.0 Weekly Snow Cover and Sea Ice Extent Version 4 product combine snow cover and sea ice extent at weekly intervals from 23 October 1978 through 31 December 2011, ...


6. Worldwide Interpretive Reports for Marine Seismic-Reflection and Other Geophysical Data [gov.noaa.ngdc.mgg.seismic.G00976]
This file contains US Geological Survey Open File Reports for Marine Seismic-Reflection data. The majority of these data are available on mylar/black line full-size sections. Lines may be obtained ...


7. Downhole Logging Data from the Deep Sea Drilling Project [gov.noaa.ngdc.mgg.well_log.G00913]
Digital downhole wire-line logging data from the Deep Sea Drilling Project (DSDP) previously available from NGDC on CD-ROM are now available from the Borehole Research Group of the Lamont-Doherty ...


8. Water Column Sonar Data Collection [gov.noaa.ngdc.mgg.wcd.WCD_Collection]
The collection and analysis of water column sonar data is a relatively new avenue of research into the marine environment. Primary uses include assessing biological abundance, species identification,and ...


9. Calculations of the Total Number of Electrons Along a Ray Path Extending from the Transmitter to the Receiver [gov.noaa.ngdc.stp.ionosphere.G00566]
Ionospheric Total Electron Content (TEC) is the total number of electrons in a column of unit cross section extending from the transmitter to the receiver. TEC is calculated from observations of the ...


10. Defense Meteorological Satellite Program (DMSP) - Space Weather Sensors [gov.noaa.ngdc.stp.ionosphere.G10022]
The Defense Meteorological Satellite Program (DMSP) maintains a constellation of sun-synchronous, near-polar orbiting satellites. The orbital period is 101 minutes and inclination is 99 degrees. The ...


11. Ionospheric Oblique Incidence Soundings by Satellites [gov.noaa.ngdc.stp.ionosphere.G00563]
The oblique incidence sweep-frequency ionospheric sounding technique uses the same principle of operation as the vertical incidence sounder. The primary difference is that the transmitter and receiver ...


12. Measurement of Incoherent Scatter [gov.noaa.ngdc.stp.ionosphere.G00145]
For radio waves transmitted through the ionosphere with frequencies much larger (50 to 1300MHz) than the plasma frequency (up to 15MHz), very small-scale fluctuations of electron density will scatter ...


13. AA Geomagnetic Activity Indices From Two Antipodal Observatories in Australia and England [gov.noaa.ngdc.stp.indices.G00588]
The National Geophysical Data Center receives, on a monthly basis, indices that are based on the data from two approximately antipodal observatories in England and Australia. The AA-indices are available ...


14. Air Force Geophysics Laboratory Magnetometer Network [gov.noaa.ngdc.stp.geomag.G09997]
This file is comprised of the variation one minute values of the geomagnetic components X, Y and Z. These data were calculated by the Air Force Geophysics Laboratory magnetometer network during the ...


15. Auroral Electrojet Index Designed to Provide a Global Measure, Hourly Intervals, of Auroral Zone Magnetic Activity [gov.noaa.ngdc.stp.indices.G00115]
The Auroral Electrojet (AE) index is designed to provide a global quantitative measure of auroral zone magnetic activity produced by enhanced ionospheric currents flowing below and within the auroral ...


16. Auroral Electrojet Index Designed to Provide a Global Measure, l-minute Intervals, of Auroral Zone Magnetic Activity [gov.noaa.ngdc.stp.indices.G00114]
The Auroral Electrojet index (AE) is designed to provide a global quantitative measure of auroral zone magnetic activity produced by enhanced ionospheric currents flowing below and within the auroral ...


17. Auroral Electrojet Indices Designed to Provide a Global Measure, 2.5-Minute Intervals, of Auroral Zone Magnetic Activity [gov.noaa.ngdc.stp.indices.G00113]
The Auroral Electrojet index (AE) is designed to provide a global quantitative measure of auroral zone magnetic activity produced by enhanced ionospheric currents flowing below and within the auroral ...


18. DMSP OLS - Operational Linescan System [gov.noaa.ngdc.stp.dmsp.G01119]
Visible and infrared imagery from DMSP Operational Linescan System (OLS) instruments are used to monitor the global distribution of clouds and cloud top temperatures twice each day. The archive data ...


19. DMSP SSM/I- Microwave Imager [gov.noaa.ngdc.stp.dmsp.G01123]
The SSM/I is a seven-channel, four frequency, linearly-polarized, passive microwave radiometric system which measures atmospheric, ocean and terrain microwave brightness temperatures at 19.35, 22.235, ...


20. DMSP SSMT/2 - Atmospheric Water Vapor Profiler [gov.noaa.ngdc.stp.dmsp.G10018]
The SSM/T-2 sensor is a five channel, total power microwave radiometer with three channels situated symmetrically about the 183.31 GHz water vapor resonance line and two window channels. This instrument ...


21. DST Indices - Reflection Variations in the Magnetospheric Tail Current and Field-aligned Currents in the Magnetosphere [gov.noaa.ngdc.stp.indices.G00587]
The file is comprised of monthly DST indices. These indices are derived from a network of eight stations in the equatorial latitudes. Hourly DST indices provide an index of geomagnetic activity as ...


22. Defense Meteorological Satellite Program (DMSP) [gov.noaa.ngdc.stp.dmsp.G10021]
The Defense Meteorological Satellite Program (DMSP) satellites collect visible and infrared cloud imagery as well as monitoring the atmospheric, oceanographic, hydrologic, cryospheric and near-Earth ...


23. Electron Density Profile Data Contains Virtual Height/Frequency Pairs from a Profile or Profiles (Composite Months) of Ionograms [gov.noaa.ngdc.stp.ionosonde.G00146]
The Electron Density Profile, N(h), data set contains both individual profiles and composite months. The data consist of virtual height/frequency pairs from a profile or profiles (composite months) ...


24. Geomagnetic Absolute Mean Values at Hourly Intervals from 220 Observatories Worldwide [gov.noaa.ngdc.stp.geomag.G00002]
This file is comprised of absolute mean hourly values of the geomagnetic components D, H and Z or X, Y and Z. These values, on magnetic tape, are available from approximately 220 of the 400 worldwide ...


25. Geomagnetic Components D, H, X, Y, Z, and R 10-second Instantaneous Measurements [gov.noaa.ngdc.stp.geomag.G00122]
These data are generated as part of the International Magnetospheric Study. The file consists of 10-second instantaneous measurements for the geomagnetic components D, H, X, Y, Z and R. The 10 second ...


26. Geomagnetic Indices Bulletin (GIB) [gov.noaa.ngdc.stp.geomag.G01344]
The Geomagnetic Indices Bulletin is a one page sheet containing the magnetic indices Kp, Ap, Cp, An, As, Am and the provisional aa indices. The bulletin is published monthly.


27. Geomagnetic Kn, Ks, Km Indices [gov.noaa.ngdc.stp.indices.G01185]
A full description of the indices Kn, Ks, Km is given in a monography,"Indices Kn, Ks et Km, 1964-1967", edited in 1968 by the Centre National de la Recherche Scientifique, 15 quai Anatole, France, ...


28. Geomagnetic Observatory Database February 2004 [gov.noaa.ngdc.stp.geomag.1806]
The National Geophysical Data Center maintains an active database of worldwide geomagnetic observatory data to further the understanding of Earth magnetism and the Sun-Earth environment. Historically, ...


29. Geomagnetic Principal Magnetic Storms [gov.noaa.ngdc.stp.geomag.G01183]
The abbreviations used for observatory names are as follows: GEOMAGNETIC OBSERVATORIES Code Station Geomagnetic Latitude ABG Alibag AMS Martin de Vivie. These data present the principal magnetic storms ...


30. Geomagnetic Variation Data - 1-Minute Remote Geophysical Observatory Network (RGON) [gov.noaa.ngdc.stp.geomag.G00124]
This data file was generated as part of the International Magnetospheric Study (IMS). The file consists of values of the geomagnetic components D, H, X, Y, Z, and R averaged from 10-second instantaneous ...


31. Geomagnetic aa Indices [gov.noaa.ngdc.stp.indices.G00020]
The geomagnetic aa indices are the continuation of the series beginning in the year 1868. A full description of these indices is given in the International Association of Geomagnetism and Aeronomy ...


32. Instantaneous Absolute Values of the Geomagnetic Components D, H, and Z or X,Y, and Z at 1-minute Intervals for 50 Observatories Database [gov.noaa.ngdc.stp.geomag.G00021]
The file is comprised of instantaneous absolute values of the geomagnetic components D, H, and Z or X, Y, and Z at 1-minute intervals. These values were derived either from analog recordings (magnetograms) ...


33. Ionospheric Digital Database [gov.noaa.ngdc.stp.ionosonde.G01257]
The ionosphere is that part of the Earth's atmosphere that results mainly from the photo ionization of the upper atmosphere. Traditionally, the following ionospheric regions and their approximate ...


34. K Indices of Magnetic Activity Relative to an assumed Quiet-day for each 3-Hour Period [gov.noaa.ngdc.stp.indices.G00590]
The National Geophysical Data Center receives the K indices on a current basis from approximately 85 observatories. The K index is a quasi-logarithmic local index of the 3-hourly range in magnetic ...


35. Pathfinder Climate Data [gov.noaa.ngdc.stp.dmsp.G01296]
The NOAA/NASA Pathfinder climate data CD-ROM contains seven data sets: Advanced Very High Resolution Radiometer (AVHRR)Land and Ocean, TIROS Operational Vertical Sounder (TOVS) Paths A, C1, C2, Special ...


36. Photographic Records Showing the Variations of the Virtual Height of Reflection as a Function of the Radio Frequency [gov.noaa.ngdc.stp.ionosonde.G00551]
The standard (analog) ionosonde produces photographic records known as ionograms, which show the variations of the virtual height of reflection as a function of the radio frequency. The frequency ...


37. Reflection of the Geomagnetic Activity Occurring in the Earth's Northern and Southern Hemisphere (KM, KN, KS Indices) [gov.noaa.ngdc.stp.indices.G00589]
The National Geophysical Data Center receives on a monthly basis, the KM, KN, KS indices from Institue De Physique Du Globe, Paris, France. These data are available from 1959 to present. The KN and ...


38. Values for the 15-minute Index of Geomagnetic Activity at High Latitude Stations (Geomagnetic Latitude 58 Degrees) [gov.noaa.ngdc.stp.indices.G00592]
The National Geophysical Data Center receives, on a monthly basis, Q indices from Sodankyla. These data are available from July 1957 to the present. Sodankyla indices are the most complete records ...


39. Values of Kp Indices, Ap Indices, Cp Indices, C9 Indices, Sunspot Number, and 10.7 cm Flux [gov.noaa.ngdc.stp.indices.G00191]
This data file consists of Kp indices, Ap indices, Cp indices, C9 indices, sunspot number, and 10.7 cm flux. The most often requested parameter of this file are the Kp indices. These planetary indices ...


40. Worldwide Hourly Values of Ionospheric Characteristics: foF2, M(3000)F2, hF2,FoF1, M(3000)F1, hF, FoE, hE, foE2, hE2, foEs, fbEs, fmI, and FxI [gov.noaa.ngdc.stp.ionosonde.G00004]
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 ...


41. Worldwide Instantaneous Values of Geomagnetic Components D, H, and Z or X, Y, and Z at 2.5-minute Intervals from 1964 to 1974 [gov.noaa.ngdc.stp.geomag.G00001]
This data file is comprised of instantaneous values of the geomagnetic components D, H, and Z or X, Y, and Z at 2.5-minute intervals. These values were derived from analog recordings (magnetograms) ...


42. Worldwide Magnetograms with Geomagnetic Components D, H, Z, or X, Y, and Z [gov.noaa.ngdc.stp.geomag.G00583]
The National Geophysical Data Center receives magnetograms from over 200 geomagnetic observatories. The Center archives data from 1867 to the present, however the primary holdings are from 1957 to ...


43. MultiBeam Bathymetric Data Base (MBBDB) [gov.noaa.ngdc.G01034]
NGDC manages a wide variety of geophysical data including trackline and survey data as two distinct types. Multibeam data tend to bridge these data models depending on scale and track pattern. One ...


44. Global Monthly EASE-Grid Snow Water Equivalent Climatology [NSIDC-0271]
This data set comprises global, monthly satellite-derived Snow Water Equivalent (SWE) climatologies from November 1978 through May 2007, with periodic updates released as resources permit. Global ...


45. AMSR-E/Aqua Daily EASE-Grid Brightness Temperatures [NSIDC-0301]
This document pertains to two data sets: AMSR-E/Aqua Daily EASE-Grid Brightness Temperatures (NSIDC-0301) and AMSR-E/Aqua Daily Global Quarter-Degree Gridded Brightness Temperatures (NISDC-0302). ...


46. AMSR-E/Aqua Daily Global Quarter-Degree Gridded Brightness Temperatures [NSIDC-0302]
The Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E) instrument on the NASA EOS Aqua satellite provides global passive microwave measurements of the Earth. NSIDC produces AMSR-E ...


47. Daily Global Land Surface Parameters Derived from AMSR-E [NSIDC-0451]
Notice to Data Users: The documentation for this data set was provided solely by the Principal Investigator(s) and was not further developed, thoroughly reviewed, or edited by NSIDC. Thus, support ...


48. EUMETSAT OSI SAF Global Sea Ice Concentration Reprocessing Data [NSIDC-0508]
The global reprocessed sea ice concentration data set from the EUMETSAT Ocean and Sea Ice Satellite Application Facility (OSI SAF) spans 1978 through 2009 and was generated with brightness temperature ...


49. World Reference Base for Soil Resources (WRB) [FAO_AGL_WRB]
Three volumes describing thirty Soil Reference Groups including pictures of soil profiles, landscapes in which they occur, brief overview of soil management implications, distribution of the Soil ...


50. Raptor Information System [usgsbrdfresc0007]
The Raptor Information System (RIS) is a computerized literature retrieval system. It deals with raptor management, human impacts on raptors, the mitigation of adverse impacts, and basic raptor biology ...


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