-
Federal
Ionospheric Digital Database
National Oceanic and Atmospheric Administration, Department of Commerce —
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... -
Federal
Ionospheric Oblique Incidence Soundings by Satellites
National Oceanic and Atmospheric Administration, Department of Commerce —
The oblique incidence sweep-frequency ionospheric sounding technique uses the same principle of operation as the vertical incidence sounder. The primary difference is... -
Federal
Calculations of the Total Number of Electrons Along a Ray Path Extending from the Transmitter to the Receiver
National Oceanic and Atmospheric Administration, Department of Commerce —
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... -
Federal
Photographic Records Showing the Variations of the Virtual Height of Reflection as a Function of the Radio Frequency
National Oceanic and Atmospheric Administration, Department of Commerce —
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...