• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 2012-01-01T00:00:00.000+00:00

Ionograms are recorded tracings of reflected high frequency radio pulses generated by an ionosonde. Unique relationships exist between the sounding frequency and the ionization densities which can...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 1958-01-01T00:00:00.000+00:00

Ionograms are recorded tracings of reflected high frequency radio pulses generated by an ionosonde. Unique relationships exist between the sounding frequency and the ionization densities which can...

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• Organization: National Aeronautics and Space Administration
• Updated: 2026-02-10

It has been known for nearly three decades that high-redshift radio galaxies exhibit steep radio spectra, and hence ultrasteep spectrum radio sources provide candidates for high-redshift radio...

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• Organization: Department of Homeland Security
• Updated: 2025-07-01T11:27:25-04:00

The FEMA National Radio System (FNARS) data set comprises semi-monthly testing data, including: test date/times, number of systems, system identifiers, system locations, frequencies, Call Signs,...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 2012-10-14T00:00:00.000+00:00

Scientists monitor the structure of the solar corona, the outer most regions of the Sun's atmosphere, using radio waves (100’s of MHz to 10’s of GHz). Variations in the radiowave...

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• Organization: National Aeronautics and Space Administration
• Updated: 2026-02-10

This table contains a catalog based on deep multifrequency observations made using the Giant Metrewave Radio Telescope (GMRT) at 153, 244, 610 and 1260 MHz of a field centred on J0916+6348, to...

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• Organization: National Aeronautics and Space Administration
• Updated: 2026-02-10

Wind Waves instrument, Plasma and Radio Wave Key Parameter data: electric field average intensity in dB above background at 76 log-spaced frequencies from 250 Hz to 9.4 MHz that is determined from...

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• Organization: Department of the Interior
• Updated: 2024-07-25T00:00:00Z

Raw detection tabular data collected of text files from each receiver download in 2020 using Sigma Eight orion radio telemetry receivers positioned in the Boquet River, NY to assess landlocked...

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• Organization: National Aeronautics and Space Administration
• Updated: 2026-02-10

The RADIO database table is a periodically revised master catalog that contains selected parameters from a number of the HEASARC database tables that have information on radio source flux...

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• Organization: National Aeronautics and Space Administration
• Updated: 2026-02-10

PKSCAT90 is the Parkes Catalog (1990) and consists of radio and optical data for 8,264 radio sources. It covers essentially all the sky south of declination +27 degrees but largely excludes the...

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• Organization: National Institute of Standards and Technology
• Updated: 2024-05-07 00:00:00

Datasets for the four published figures in the Paper "AC Metrology Applications of the Josephson Effect ". This paper is being submitted to Applied Physics Letters Special Topic, "Advances in...

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• Organization: National Aeronautics and Space Administration
• Updated: 2026-02-10

A well-known property of the gamma-ray sources detected by Cos-B in the 1970s, by the Compton Gamma-Ray Observatory in the 1990s, and recently by the Fermi Gamma-ray Observatory is the presence of...

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• Organization: National Aeronautics and Space Administration
• Updated: 2026-02-10

This table contains some of the results from the first dedicated radio continuum survey of a Kepler K2 mission field, Field 1, covering the North Galactic Cap. The survey was wide-field,...

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• Organization: National Aeronautics and Space Administration
• Updated: 2026-02-10

The Planck Early Release Compact Source Catalogue (ERCSC) includes nine lists of highly reliable sources, individually extracted at each of the nine Planck frequency channels. To facilitate the...

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• Organization: National Aeronautics and Space Administration
• Updated: 2026-02-10

This table contains some of the results from the first dedicated radio continuum survey of a Kepler K2 mission field, Field 1, covering the North Galactic Cap. The survey was wide-field,...

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• Organization: National Aeronautics and Space Administration
• Updated: 2025-07-17

This data set consists of raw data collected during the Titan radio occultation of Voyager 1 in November 1980 plus ancillary files that might be useful in analysis of those data. The raw data are...

• Organization: National Aeronautics and Space Administration
• Updated: 2026-02-10

This table contains some of the first results from the Australia Telescope Large Area Survey (ATLAS), which consists of deep radio observations of a 3.7 deg² field surrounding the...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 1958-01-01T00:00:00.000+00:00

Sudden ionospheric disturbances (SID) are caused by solar flare enhanced X-rays in the 1 to 10 angstrom range. Solar flares can produce large increases of ionization in the D-region of the...

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• Organization: National Aeronautics and Space Administration
• Updated: 2025-07-17

This data set consists of raw data collected during the Saturn egress radio occultation of Voyager 1 on 13 November 1980 plus ancillary files that might be useful in analysis of those data. The...

• Organization: National Aeronautics and Space Administration
• Updated: 2026-02-10

This table contains some of the first results from the Australia Telescope Large Area Survey (ATLAS), which consists of deep 1.4-GHz radio observations of a 3.7 deg² field surrounding...

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