Global Change Master Directory gsfc-gcmduso@mail.nasa.gov 50 2013-06-19T12:07:00Z http://mddemo.gsfc.nasa.gov/KeywordSearch/OpenSearch.do 49 0 http://gcmd.gsfc.nasa.gov/getdif.htm?[AADC]IPS_IONOSONDE 60.0,-70.0,165.0,-50.0 1937-01-01T00:00:00Z T00:00:00Z 2013-02-05T05:00:00Z

Routine high latitude observations made in Antarctica form a climatological baseline of the ionosphere extending back to 1958 at Mawson and Casey, and for almost two decades at Davis and Macquarie ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]NICT_IONOSONDE_OBS 40.0,-69.0,40.0,-69.0 1956-01-01T00:00:00Z T00:00:00Z 2012-04-16T04:00:00Z

Virtual height profile of ionospheric electron density at Syowa Station, East Antarctica

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]SDO_DIF_PLACEHOLDER 2012-02-01T05:00:00Z

[Text Source: The Solar Dynamics Observatory (SDO) Project Home page, http://sdo.gsfc.nasa.gov/mission/about.php ] SDO: The Solar Dynamics Observatory is the first ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]WIND_EPACT -180.0,-90.0,180.0,90.0 1994-11-01T00:00:00Z T00:00:00Z 2011-12-15T05:00:00Z

The main purpose of the Wind spacecraft is to measure the incoming solar wind, magnetic fields and particles, although early on it will also observe the Earth's foreshock region. Wind, together with ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[NOAA-NMMR]gov.noaa.ngdc.G01257 -180.0,-90.0,180.0,90.0 1957-01-01T00:00:00Z 1990-01-01T00:00:00Z 2011-04-19T04:00:00Z

ABSTRACT: 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 ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[NOAA-NMMR]gov.noaa.ngdc.G01119 -180.0,-90.0,180.0,90.0 1975-04-01T00:00:00Z T00:00:00Z 2011-03-10T05:00:00Z

ABSTRACT: 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 ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[NOAA-NMMR]gov.noaa.ngdc.G01127 -180.0,-90.0,180.0,90.0 1975-04-01T00:00:00Z T00:00:00Z 2011-03-10T05:00:00Z

ABSTRACT: The SSIES measures the ambient electron density and temperatures, ambient ion density, the average ion temperature and molecular weight, the plasma drift and scintillation at the DMSP orbital ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[NOAA-NMMR]gov.noaa.ngdc.G00563 -180.0,-90.0,180.0,90.0 1957-01-15T00:00:00Z 1975-01-01T00:00:00Z 2011-03-03T05:00:00Z

ABSTRACT: 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 ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[NOAA-NMMR]gov.noaa.ngdc.G00556 -180.0,-90.0,180.0,90.0 1944-03-01T00:00:00Z T00:00:00Z 2011-03-03T05:00:00Z

ABSTRACT: These ionospheric data consist of scaling notes, equipment usage logs, and ionospheric values in the form of daily work sheets, F-Plots, tabulations, and booklets. The station notes list ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[NOAA-NMMR]gov.noaa.ngdc.G00569 -180.0,-90.0,180.0,90.0 1963-01-01T00:00:00Z 1990-12-31T00:00:00Z 2011-03-03T05:00:00Z

ABSTRACT: Absorption of radio waves occurs when electrons responding to the wave fields collide with and transfer energy to the neutral particles. A study of ionospheric absorption yields information ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[NOAA-NMMR]gov.noaa.ngdc.G00146 -180.0,-90.0,180.0,90.0 1954-12-15T00:00:00Z 1993-12-31T00:00:00Z 2011-03-01T05:00:00Z

ABSTRACT: 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 ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[NOAA-NMMR]gov.noaa.ngdc.G00145 -180.0,-90.0,180.0,90.0 1965-11-15T00:00:00Z 1977-12-15T00:00:00Z 2011-03-01T05:00:00Z

ABSTRACT: 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 ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]INCOHERENT_SCATTER_RADAR -76.0,-12.0,-76.0,-11.0-67.0,18.0,-66.0,19.0137.0,34.0,136.0,35.0-72.0,42.0,-71.0,43.00.0,44.0,3.0,48.0-148.0,65.0,-147.0,66.020.0,67.0,21.0,68.0-27.0,67.0,-26.0,68.0-51.0,67.0,-51.0,67.0 1966-01-01T00:00:00Z T00:00:00Z 2011-01-31T05:00:00Z

The Coupling, Energetics, and Dynamics of Atmospheric Regions (CEDAR) at the National Center for Atmospheric Research/High Altitude Observatory (NCAR/HAO) incoherent-radar data base was established ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]CEDAR_NCAR_HAO -180.0,-90.0,180.0,90.0 1966-01-01T00:00:00Z T00:00:00Z 2010-09-22T04:00:00Z

The Coupling, Energetics, and Dynamics of Atmospheric regions (CEDAR) is a program sponsored by the National Science Foundation (NSF) designed to enhance the capability of ground-based instruments ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]IPST_UMD_ANTARCTIC_IONOS -0.0,-90.0,-0.0,-90.0166.67,-77.85,166.67,-77.85 1986-01-01T00:00:00Z 2001-01-01T00:00:00Z 2010-07-07T04:00:00Z

The projects that operate from instrumentation at South Pole Station, and at the Arrival Heights Laboratory at McMurdo Station, examine natural phenomena occurring in the earth's atmosphere, ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]SIENA_ANTARCTIC_IONOS -0.0,-90.0,-0.0,-90.0166.67,-77.85,166.67,-77.85 1986-01-01T00:00:00Z 2001-01-01T00:00:00Z 2010-07-07T04:00:00Z

The projects that operate from instrumentation at South Pole Station, and at the Arrival Heights Laboratory at McMurdo Station, examine natural phenomena occurring in the earth's atmosphere, ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]SPDS-General -180.0,-90.0,180.0,90.0 2009-08-28T04:00:00Z

The Space Physics Data System (SPDS) ( http://spdf.gsfc.nasa.gov/ ) serves the four science disciplines encompassed within the programs of the NASA Space Physics Division, namely: ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]IMP8_LANL 1973-10-30T00:00:00Z T00:00:00Z 2009-08-27T04:00:00Z

IMP-8 (IMP-J) was launched by NASA on October 26, 1973 to measure the magnetic fields, plasmas, and energetic charged particles (e.g., cosmic rays) of the Earth's magnetotail ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]EQUATOR-S 1997-12-02T00:00:00Z T00:00:00Z 2009-04-14T04:00:00Z

EQUATOR-S is a low-cost mission designed to study the Earth's equatorial magnetosphere out to distances of 67000 km and it forms an element of the closely-coordinated ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]ACE_PARTCLE_FLUXES 1997-08-25T00:00:00Z T00:00:00Z 2009-03-30T04:00:00Z

The Advanced Composition Explorer (ACE) is an Explorer mission that is being managed by the Office of Space Science Mission and Payload Development Division of the National Aeronautics ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]ACE_SWEPAM_LEVEL2 1997-08-25T00:00:00Z T00:00:00Z 2009-03-30T04:00:00Z

The Solar Wind Electron, Proton, and Alpha Monitor (SWEPAM) measures the solar wind plasma electron and ion fluxes (rates of particle flow) as functions of direction and energy. These ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]ENVIRONET -180.0,-90.0,180.0,90.0 2008-05-29T04:00:00Z

The National Space Science Data Center (NSSDC) at NASA/Goddard Space Flight Center has many space physics and space weather models available on: - Gavitation and Geopotential Models - Atmospheric ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]SOHO_COSTEP 1995-12-02T00:00:00Z T00:00:00Z 2008-05-29T04:00:00Z

COSTEP addresses scientific objectives related to the following phenomena: * Steady state processes in the solar atmosphere * Energy release and particle acceleration in the solar atmosphere ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]DE_WATS_1 -180.0,-90.0,180.0,90.0 1981-08-05T00:00:00Z 1983-02-18T00:00:00Z 2008-05-28T04:00:00Z

The Wind and Temperature (WATS) experiment on the Dynamics Explorer-2 (DE-2) spacecraft consists of a closed source neutral mass spectrometer with two rectangular baffles which are swept across the ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]IMAGE 2000-03-25T00:00:00Z T00:00:00Z 2008-05-27T04:00:00Z

The Imager for Magnetosphere-to-Aurora Global Exploration (IMAGE) mission produced the first comprehensive global images of the plasma populations in the inner magnetosphere. IMAGE data are archived ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]NASA_POLAR 1996-02-24T00:00:00Z T00:00:00Z 2008-05-09T04:00:00Z

The Polar spacecraft was launched on February 24, 1996, to obtain data from both high- and low-altitude perspectives of this active region of geospace. High above the poles the particles of the solar ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]SOHO_CELIAS 1995-12-02T00:00:00Z T00:00:00Z 2008-05-07T04:00:00Z

The CELIAS instrument is designed to study the composition of the solar wind (SW) and of solar and interplanetary energetic particles on SOHO. SOHO is a project of international cooperation between ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]SOHO_ERNE 1995-12-02T00:00:00Z T00:00:00Z 2008-05-05T04:00:00Z

The Energetic and Relativistic Nuclei and Electron (ERNE) Sensor Unit (ESU) has two energetic particle sensors: LED and HED. ERNE will investigate the solar atmosphere by detecting charged particles ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]CIRA_MODEL -180.0,-80.0,180.0,80.0 2006-10-16T04:00:00Z

The COSPAR International Reference Atmosphere (CIRA) provides empirical models of atmospheric temperature and densities as recommended by the Committee on Space Research (COSPAR). Since the early ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]CEDAR_LIDAR -67.0,17.0,-66.0,18.0-155.0,20.0,-155.0,20.0-88.0,40.0,-88.0,40.0-106.0,41.0,-105.0,41.0 1989-10-01T00:00:00Z 1993-12-31T00:00:00Z 2006-10-13T04:00:00Z

The Coupling, Energetics, and Dynamics of Atmospheric Regions (CEDAR) Data Base at NCAR/HAO holds data collected from Lidar measurements. Basic parameters measured include photocounts, relative neutral ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]CEDAR_MODELS -180.0,-90.0,180.0,90.0 2006-10-13T04:00:00Z

The Coupling, Energetics, and Dynamics of Atmospheric Regions (CEDAR) Data Base at NCAR/HAO holds information on theoretical models and source code for several empirical models. Theoretical models ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]NASC_VERN_IONOSONDE -64.0,-65.0,-64.0,-65.0 1996-01-01T00:00:00Z 2004-12-31T00:00:00Z 2006-05-19T04:00:00Z

Ionosphere sounding is carried out using the semi-automatic station ISP-42. This is a radar system for impulse radio sounding of the ionosphere in the height interval up to 800 km at frequencies 1.0-22.6 ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]Ionospheric_vertical_sounding 164.1,-74.7,164.1,-74.7 1993-11-01T00:00:00Z 2002-01-01T00:00:00Z 2005-08-01T04:00:00Z

Ionospheric observations, using radio techniques, are an important part of the aeronomic studies that may be carried out in polar zones where the peculiarity of the physical phenomena, due to the ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]WIND_SWE 1994-11-01T00:00:00Z T00:00:00Z 2005-08-01T04:00:00Z

The main purpose of the Wind spacecraft is to measure the incoming solar wind, magnetic fields and particles, although early on it will also observe the Earth's foreshock region. Wind, together with ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]WIND_SMS 1994-11-01T00:00:00Z T00:00:00Z 2005-08-01T04:00:00Z

The main purpose of the Wind spacecraft is to measure the incoming solar wind, magnetic fields and particles, although early on it will also observe the Earth's foreshock region. Wind, together with ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]WIND_3DP -180.0,-90.0,180.0,90.0 1994-11-01T00:00:00Z T00:00:00Z 2005-07-29T04:00:00Z

The main purpose of the Wind spacecraft is to measure the incoming solar wind, magnetic fields and particles, although early on it will also observe the Earth's foreshock region. Wind, together with ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]CLUSTER-II 2000-07-16T00:00:00Z T00:00:00Z 2005-07-29T04:00:00Z

Cluster II is part of an international collaboration to investigate the physical connection between the Sun and Earth. Flying in a tetrahedral (triangular pyramid) formation, the four spacecraft collect ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]CRRES 1990-07-25T00:00:00Z 1991-10-12T00:00:00Z 2005-07-29T04:00:00Z

The Combined Release and Radiation Effects Satellite (CRRES) was launched into a geosynchronous transfer orbit (GTO) for a nominal three-year mission to investigate fields, plasmas, and energetic ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]IMP8_JHUCPME 1973-10-30T00:00:00Z T00:00:00Z 2005-07-29T04:00:00Z

IMP-8 (IMP-J) was launched by NASA on October 26, 1973 to measure the magnetic fields, plasmas, and energetic charged particles (e.g., cosmic rays) of the Earth's magnetotail and magnetosheath and ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]IMP8_GSFC 1973-10-30T00:00:00Z T00:00:00Z 2005-07-29T04:00:00Z

IMP-8 (IMP-J) was launched by NASA on October 26, 1973 to measure the magnetic fields, plasmas, and energetic charged particles (e.g., cosmic rays) of the Earth's magnetotail and magnetosheath and ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]IMP8_IOWA 1973-10-30T00:00:00Z T00:00:00Z 2005-07-29T04:00:00Z

IMP-8 (IMP-J) was launched by NASA on October 26, 1973 to measure the magnetic fields, plasmas, and energetic charged particles (e.g., cosmic rays) of the Earth's magnetotail and magnetosheath and ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]IMP8_MIT 1973-10-30T00:00:00Z T00:00:00Z 2005-07-29T04:00:00Z

IMP-8 (IMP-J) was launched by NASA on October 26, 1973 to measure the magnetic fields, plasmas, and energetic charged particles (e.g., cosmic rays) of the Earth's magnetotail and magnetosheath and ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]AD-ABC -180.0,-90.0,180.0,90.0 1963-12-19T00:00:00Z 1973-01-13T00:00:00Z 2005-07-28T04:00:00Z

This experiment was designed to determine nonsystematic changes of upper atmospheric density by conducting studies of the drag on a 3.6-m diameter, low-density sphere caused by short-term variations ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]HWM87_MODEL -180.0,-90.0,180.0,90.0 2005-07-28T04:00:00Z

The HWM87 is an empirical model of the horizontal neutral wind in the upper thermosphere analogous to the MSIS model for neutral temperature and density. It is based on wind data obtained from the ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]MSIS_Model -180.0,-90.0,180.0,90.0 2005-07-28T04:00:00Z

The Mass-Spectrometer-Incoherent-Scatter (MSIS) model describes the neutral temperature and densities in the Upper Atmosphere (above about 100 km). MSIS-86 constitutes the upper part of the COSPAR ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]63-009A -180.0,-90.0,180.0,90.0 1963-04-04T00:00:00Z 1984-09-30T00:00:00Z 2005-07-28T04:00:00Z

NSSDC holds many data sets containing measurements of the structure, composition, and dynamics of the Earth's neutral atmosphere. The measurements are both in situ and remote. For details about searching ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]73-101A -180.0,-90.0,180.0,90.0 1973-12-16T00:00:00Z 1981-06-07T00:00:00Z 2005-07-28T04:00:00Z

Data collected by the Atmosphere Explorer C, D and E satellites are provided on one CD-ROM. The CD also includes data-related atmospheric/ionospheric/ magnetospheric models and software. The data ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]NCAR_UPA -180.0,-90.0,180.0,90.0 1979-01-01T00:00:00Z T00:00:00Z 2005-07-28T04:00:00Z

These data sets including model data correspond mostly to the upper atmosphere between 80 and 1000 km and is archived at the National Center for Atmospheric Research (NCAR). A detailed catalog of ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]RIO-01 164.0,-74.0,164.0,-74.0 1993-12-01T00:00:00Z 1994-02-03T00:00:00Z 1997-06-11T04:00:00Z

Cosmic noise is received at 38.2 MHz by a solid state Riometer and dual dipole antenna at Terra Nova Bay, Italian Antarctic Base. These kind of measurements are useful to determine the ionospheric ...