• 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: 1973-01-01T00:00:00.000+00:00

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...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 1957-01-01T00:00:00.000+00:00

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...

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

All the data contributed come from 1957 through 1990. They have been digitized, reformatted, converted to universal time (the software also can display the data in local meridian time), and passed...

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

This data set tabulates local electron densities and local magnetic field strengths magnetic field strengths obtained from Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS)...

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

This data set tabulates local electron densities and local magnetic field strengths magnetic field strengths obtained from Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS)...

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

This data set tabulates local electron densities and local magnetic field strengths magnetic field strengths obtained from Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS)...

• 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: 2025-07-17

The Mars Express MARSIS Active Ionospheric Sounder (AIS) full resolution data set includes all spectral information calibrated in units of spectral density for the entire Mars Express nominal...

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

The Mars Express MARSIS Active Ionospheric Sounder (AIS) full resolution data set includes all spectral information calibrated in units of spectral density for the Mars Express third extended...

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

The Mars Express MARSIS Active Ionospheric Sounder (AIS) full resolution data set includes all spectral information calibrated in units of spectral density for the Mars Express fifth extended...

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

The Mars Express MARSIS Active Ionospheric Sounder (AIS) full resolution data set includes all spectral information calibrated in units of spectral density for the entire Mars Express nominal...

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

The Mars Express MARSIS Active Ionospheric Sounder (AIS) full resolution data set includes all spectral information calibrated in units of spectral density for the Mars Express fourth extended...

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

The Mars Express MARSIS Active Ionospheric Sounder (AIS) full resolution data set includes all spectral information calibrated in units of spectral density for the Mars Express sixth extended...

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

The Mars Express MARSIS Active Ionospheric Sounder (AIS) full resolution data set includes all spectral information calibrated in units of spectral density for the entire Mars Express nominal...

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

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...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 1984-01-01T00:00:00.000+00:00

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 the...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 1964-01-01T00:00:00.000+00:00

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 on...

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