Assessment of the Status and Dynamics of the Ionospheric D region Using Space-Based Radio Facilities

• download

    The ionospheric D region is insufficiently studied in comparison with

   other regions. This is due to its composition (negative ions and cluster

   ions) and dynamics (aerological and meteorological factors and solar and

   galactic cosmic ionization), as well as to the absence of methods for

   routine global monitoring.

   An estimation method for the state of the ionospheric D region and the

   base of the E region by space based facilities is suggested on the basis

   of an analysis of differential absorption of radio waves of ordinary and

   extraordinary polarizations in the lower ionosphere. Satellite ionospheric

   sounding data are model analyzed in the frequency band above fxF2.

   Based on the model analysis of satellite ionospheric sounding data, the

   frequency band above fxF2 is shown to be prospective for the global

   satellite monitoring of the ionospheric D region.

   The presence of a reflecting surface (that of the Earth) does not require

   an increase in the power of an ionosonde board transmitter, and

   satellite-mounted equipment allows the operative monitoring of the

   D-region over seismically active regions.